Compatibility fragment commit
[phpeclipse.git] / net.sourceforge.phpeclipse.32.compatibility / src / net / sourceforge / phpdt / internal / core / JavaModelManager.java
diff --git a/net.sourceforge.phpeclipse.32.compatibility/src/net/sourceforge/phpdt/internal/core/JavaModelManager.java b/net.sourceforge.phpeclipse.32.compatibility/src/net/sourceforge/phpdt/internal/core/JavaModelManager.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.core;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.text.NumberFormat;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.WeakHashMap;
+import java.util.zip.ZipFile;
+
+import net.sourceforge.phpdt.core.ElementChangedEvent;
+import net.sourceforge.phpdt.core.IClasspathEntry;
+import net.sourceforge.phpdt.core.ICompilationUnit;
+import net.sourceforge.phpdt.core.IElementChangedListener;
+import net.sourceforge.phpdt.core.IJavaElement;
+import net.sourceforge.phpdt.core.IJavaElementDelta;
+import net.sourceforge.phpdt.core.IJavaModel;
+import net.sourceforge.phpdt.core.IJavaProject;
+import net.sourceforge.phpdt.core.IPackageFragment;
+import net.sourceforge.phpdt.core.IPackageFragmentRoot;
+import net.sourceforge.phpdt.core.IParent;
+import net.sourceforge.phpdt.core.IProblemRequestor;
+import net.sourceforge.phpdt.core.IWorkingCopy;
+import net.sourceforge.phpdt.core.JavaCore;
+import net.sourceforge.phpdt.core.JavaModelException;
+import net.sourceforge.phpdt.core.WorkingCopyOwner;
+import net.sourceforge.phpdt.core.compiler.IProblem;
+import net.sourceforge.phpdt.internal.core.builder.PHPBuilder;
+import net.sourceforge.phpdt.internal.core.util.Util;
+import net.sourceforge.phpdt.internal.ui.util.PHPFileUtil;
+import net.sourceforge.phpeclipse.PHPeclipsePlugin;
+
+import org.eclipse.core.resources.IFile;
+import org.eclipse.core.resources.IFolder;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.IResourceDelta;
+import org.eclipse.core.resources.ISaveContext;
+import org.eclipse.core.resources.ISaveParticipant;
+import org.eclipse.core.resources.IWorkspace;
+import org.eclipse.core.resources.IWorkspaceDescription;
+import org.eclipse.core.resources.IWorkspaceRoot;
+import org.eclipse.core.resources.ResourcesPlugin;
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.ISafeRunnable;
+import org.eclipse.core.runtime.IStatus;
+import org.eclipse.core.runtime.MultiStatus;
+import org.eclipse.core.runtime.Path;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.Plugin;
+import org.eclipse.core.runtime.Preferences;
+import org.eclipse.core.runtime.Status;
+import org.eclipse.core.runtime.Preferences.PropertyChangeEvent;
+
+/**
+ * The <code>JavaModelManager</code> manages instances of
+ * <code>IJavaModel</code>. <code>IElementChangedListener</code>s register
+ * with the <code>JavaModelManager</code>, and receive
+ * <code>ElementChangedEvent</code>s for all <code>IJavaModel</code>s.
+ * <p>
+ * The single instance of <code>JavaModelManager</code> is available from the
+ * static method <code>JavaModelManager.getJavaModelManager()</code>.
+ */
+public class JavaModelManager implements ISaveParticipant {
+       /**
+        * Unique handle onto the JavaModel
+        */
+       final JavaModel javaModel = new JavaModel();
+
+       // public IndexManager indexManager = new IndexManager();
+       /**
+        * Classpath variables pool
+        */
+       public static HashMap Variables = new HashMap(5);
+
+       public static HashMap PreviousSessionVariables = new HashMap(5);
+
+       public static HashSet OptionNames = new HashSet(20);
+
+       public final static String CP_VARIABLE_PREFERENCES_PREFIX = PHPeclipsePlugin.PLUGIN_ID
+                       + ".classpathVariable."; //$NON-NLS-1$
+
+       public final static String CP_CONTAINER_PREFERENCES_PREFIX = PHPeclipsePlugin.PLUGIN_ID
+                       + ".classpathContainer."; //$NON-NLS-1$
+
+       public final static String CP_ENTRY_IGNORE = "##<cp entry ignore>##"; //$NON-NLS-1$
+
+       /**
+        * Classpath containers pool
+        */
+       public static HashMap containers = new HashMap(5);
+
+       public static HashMap PreviousSessionContainers = new HashMap(5);
+
+       /**
+        * Name of the extension point for contributing classpath variable
+        * initializers
+        */
+       // public static final String CPVARIABLE_INITIALIZER_EXTPOINT_ID =
+       // "classpathVariableInitializer" ; //$NON-NLS-1$
+       /**
+        * Name of the extension point for contributing classpath container
+        * initializers
+        */
+       // public static final String CPCONTAINER_INITIALIZER_EXTPOINT_ID =
+       // "classpathContainerInitializer" ; //$NON-NLS-1$
+       /**
+        * Name of the extension point for contributing a source code formatter
+        */
+       public static final String FORMATTER_EXTPOINT_ID = "codeFormatter"; // $/**
+
+       /**
+        * Value of the content-type for Java source files
+        */
+       public static final String JAVA_SOURCE_CONTENT_TYPE = PHPeclipsePlugin.PLUGIN_ID
+                       + ".phpSource"; //$NON-NLS-1$NON-NLS-1$
+
+       /**
+        * Special value used for recognizing ongoing initialization and breaking
+        * initialization cycles
+        */
+       public final static IPath VariableInitializationInProgress = new Path(
+                       "Variable Initialization In Progress"); //$NON-NLS-1$
+       // public final static IClasspathContainer ContainerInitializationInProgress
+       // = new IClasspathContainer() {
+       // public IClasspathEntry[] getClasspathEntries() { return null; }
+       // public String getDescription() { return "Container Initialization In
+       // Progress"; } //$NON-NLS-1$
+       // public int getKind() { return 0; }
+       // public IPath getPath() { return null; }
+       // public String toString() { return getDescription(); }
+       // };
+
+       private static final String INDEX_MANAGER_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/indexmanager"; //$NON-NLS-1$
+
+       private static final String COMPILER_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/compiler"; //$NON-NLS-1$
+
+       private static final String JAVAMODEL_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/javamodel"; //$NON-NLS-1$
+
+       private static final String CP_RESOLVE_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/cpresolution"; //$NON-NLS-1$
+
+       private static final String ZIP_ACCESS_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/zipaccess"; //$NON-NLS-1$
+
+       private static final String DELTA_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/javadelta"; //$NON-NLS-1$
+
+       private static final String HIERARCHY_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/hierarchy"; //$NON-NLS-1$
+
+       private static final String POST_ACTION_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/postaction"; //$NON-NLS-1$
+
+       private static final String BUILDER_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/builder"; //$NON-NLS-1$
+
+       private static final String COMPLETION_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/completion"; //$NON-NLS-1$
+
+       private static final String SELECTION_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/selection"; //$NON-NLS-1$
+
+       private static final String SHARED_WC_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/sharedworkingcopy"; //$NON-NLS-1$
+
+       private static final String SEARCH_DEBUG = PHPeclipsePlugin.PLUGIN_ID
+                       + "/debug/search"; //$NON-NLS-1$
+
+       public final static IWorkingCopy[] NoWorkingCopy = new IWorkingCopy[0];
+
+       /**
+        * Table from WorkingCopyOwner to a table of ICompilationUnit (working copy
+        * handle) to PerWorkingCopyInfo. NOTE: this object itself is used as a lock
+        * to synchronize creation/removal of per working copy infos
+        */
+       protected Map perWorkingCopyInfos = new HashMap(5);
+
+       /**
+        * Returns whether the given full path (for a package) conflicts with the
+        * output location of the given project.
+        */
+       public static boolean conflictsWithOutputLocation(IPath folderPath,
+                       JavaProject project) {
+               try {
+                       IPath outputLocation = project.getOutputLocation();
+                       if (outputLocation == null) {
+                               // in doubt, there is a conflict
+                               return true;
+                       }
+                       if (outputLocation.isPrefixOf(folderPath)) {
+                               // only allow nesting in project's output if there is a
+                               // corresponding source folder
+                               // or if the project's output is not used (in other words, if
+                               // all source folders have their custom output)
+                               IClasspathEntry[] classpath = project
+                                               .getResolvedClasspath(true);
+                               boolean isOutputUsed = false;
+                               for (int i = 0, length = classpath.length; i < length; i++) {
+                                       IClasspathEntry entry = classpath[i];
+                                       if (entry.getEntryKind() == IClasspathEntry.CPE_SOURCE) {
+                                               if (entry.getPath().equals(outputLocation)) {
+                                                       return false;
+                                               }
+                                               if (entry.getOutputLocation() == null) {
+                                                       isOutputUsed = true;
+                                               }
+                                       }
+                               }
+                               return isOutputUsed;
+                       }
+                       return false;
+               } catch (JavaModelException e) {
+                       // in doubt, there is a conflict
+                       return true;
+               }
+       }
+
+       // public static IClasspathContainer containerGet(IJavaProject project,
+       // IPath containerPath) {
+       // Map projectContainers = (Map)Containers.get(project);
+       // if (projectContainers == null){
+       // return null;
+       // }
+       // IClasspathContainer container =
+       // (IClasspathContainer)projectContainers.get(containerPath);
+       // return container;
+       // }
+
+       // public static void containerPut(IJavaProject project, IPath
+       // containerPath, IClasspathContainer container){
+       //
+       // Map projectContainers = (Map)Containers.get(project);
+       // if (projectContainers == null){
+       // projectContainers = new HashMap(1);
+       // Containers.put(project, projectContainers);
+       // }
+       //
+       // if (container == null) {
+       // projectContainers.remove(containerPath);
+       // Map previousContainers = (Map)PreviousSessionContainers.get(project);
+       // if (previousContainers != null){
+       // previousContainers.remove(containerPath);
+       // }
+       // } else {
+       // projectContainers.put(containerPath, container);
+       // }
+       //
+       // // do not write out intermediate initialization value
+       // if (container == JavaModelManager.ContainerInitializationInProgress) {
+       // return;
+       // }
+       // Preferences preferences =
+       // PHPeclipsePlugin.getPlugin().getPluginPreferences();
+       // String containerKey =
+       // CP_CONTAINER_PREFERENCES_PREFIX+project.getElementName()
+       // +"|"+containerPath;//$NON-NLS-1$
+       // String containerString = CP_ENTRY_IGNORE;
+       // try {
+       // if (container != null) {
+       // containerString =
+       // ((JavaProject)project).encodeClasspath(container.getClasspathEntries(),
+       // null, false);
+       // }
+       // } catch(JavaModelException e){
+       // }
+       // preferences.setDefault(containerKey, CP_ENTRY_IGNORE); // use this
+       // default to get rid of removed ones
+       // preferences.setValue(containerKey, containerString);
+       // PHPeclipsePlugin.getPlugin().savePluginPreferences();
+       // }
+
+       /**
+        * Returns the Java element corresponding to the given resource, or
+        * <code>null</code> if unable to associate the given resource with a Java
+        * element.
+        * <p>
+        * The resource must be one of:
+        * <ul>
+        * <li>a project - the element returned is the corresponding
+        * <code>IJavaProject</code></li>
+        * <li>a <code>.java</code> file - the element returned is the
+        * corresponding <code>ICompilationUnit</code></li>
+        * <li>a <code>.class</code> file - the element returned is the
+        * corresponding <code>IClassFile</code></li>
+        * <li>a <code>.jar</code> file - the element returned is the
+        * corresponding <code>IPackageFragmentRoot</code></li>
+        * <li>a folder - the element returned is the corresponding
+        * <code>IPackageFragmentRoot</code> or <code>IPackageFragment</code></li>
+        * <li>the workspace root resource - the element returned is the
+        * <code>IJavaModel</code></li>
+        * </ul>
+        * <p>
+        * Creating a Java element has the side effect of creating and opening all
+        * of the element's parents if they are not yet open.
+        */
+       public static IJavaElement create(IResource resource, IJavaProject project) {
+               if (resource == null) {
+                       return null;
+               }
+               int type = resource.getType();
+               switch (type) {
+               case IResource.PROJECT:
+                       return JavaCore.create((IProject) resource);
+               case IResource.FILE:
+                       return create((IFile) resource, project);
+               case IResource.FOLDER:
+                       return create((IFolder) resource, project);
+               case IResource.ROOT:
+                       return JavaCore.create((IWorkspaceRoot) resource);
+               default:
+                       return null;
+               }
+       }
+
+       /**
+        * Returns the Java element corresponding to the given file, its project
+        * being the given project. Returns <code>null</code> if unable to
+        * associate the given file with a Java element.
+        * 
+        * <p>
+        * The file must be one of:
+        * <ul>
+        * <li>a <code>.java</code> file - the element returned is the
+        * corresponding <code>ICompilationUnit</code></li>
+        * <li>a <code>.class</code> file - the element returned is the
+        * corresponding <code>IClassFile</code></li>
+        * <li>a <code>.jar</code> file - the element returned is the
+        * corresponding <code>IPackageFragmentRoot</code></li>
+        * </ul>
+        * <p>
+        * Creating a Java element has the side effect of creating and opening all
+        * of the element's parents if they are not yet open.
+        */
+       public static IJavaElement create(IFile file, IJavaProject project) {
+               if (file == null) {
+                       return null;
+               }
+               if (project == null) {
+                       project = JavaCore.create(file.getProject());
+               }
+
+               if (file.getFileExtension() != null) {
+                       String name = file.getName();
+                       if (PHPFileUtil.isValidPHPUnitName(name))
+                               // if (PHPFileUtil.isPHPFile(file))
+                               return createCompilationUnitFrom(file, project);
+                       // if (ProjectPrefUtil.isValidClassFileName(name))
+                       // return createClassFileFrom(file, project);
+                       // if (ProjectPrefUtil.isArchiveFileName(name))
+                       // return createJarPackageFragmentRootFrom(file, project);
+               }
+               return null;
+       }
+
+       /**
+        * Returns the package fragment or package fragment root corresponding to
+        * the given folder, its parent or great parent being the given project. or
+        * <code>null</code> if unable to associate the given folder with a Java
+        * element.
+        * <p>
+        * Note that a package fragment root is returned rather than a default
+        * package.
+        * <p>
+        * Creating a Java element has the side effect of creating and opening all
+        * of the element's parents if they are not yet open.
+        */
+       public static IJavaElement create(IFolder folder, IJavaProject project) {
+               if (folder == null) {
+                       return null;
+               }
+               if (project == null) {
+                       project = JavaCore.create(folder.getProject());
+               }
+               IJavaElement element = determineIfOnClasspath(folder, project);
+               if (conflictsWithOutputLocation(folder.getFullPath(),
+                               (JavaProject) project)
+                               || (folder.getName().indexOf('.') >= 0 && !(element instanceof IPackageFragmentRoot))) {
+                       return null; // only package fragment roots are allowed with dot
+                                                       // names
+               } else {
+                       return element;
+               }
+       }
+
+       /**
+        * Creates and returns a class file element for the given
+        * <code>.class</code> file, its project being the given project. Returns
+        * <code>null</code> if unable to recognize the class file.
+        */
+       // public static IClassFile createClassFileFrom(IFile file, IJavaProject
+       // project ) {
+       // if (file == null) {
+       // return null;
+       // }
+       // if (project == null) {
+       // project = PHPCore.create(file.getProject());
+       // }
+       // IPackageFragment pkg = (IPackageFragment) determineIfOnClasspath(file,
+       // project);
+       // if (pkg == null) {
+       // // fix for 1FVS7WE
+       // // not on classpath - make the root its folder, and a default package
+       // IPackageFragmentRoot root =
+       // project.getPackageFragmentRoot(file.getParent());
+       // pkg = root.getPackageFragment(IPackageFragment.DEFAULT_PACKAGE_NAME);
+       // }
+       // return pkg.getClassFile(file.getName());
+       // }
+       /**
+        * Creates and returns a compilation unit element for the given
+        * <code>.java</code> file, its project being the given project. Returns
+        * <code>null</code> if unable to recognize the compilation unit.
+        */
+       public static ICompilationUnit createCompilationUnitFrom(IFile file,
+                       IJavaProject project) {
+
+               if (file == null)
+                       return null;
+
+               if (project == null) {
+                       project = JavaCore.create(file.getProject());
+               }
+               IPackageFragment pkg = (IPackageFragment) determineIfOnClasspath(file,
+                               project);
+               if (pkg == null) {
+                       // not on classpath - make the root its folder, and a default
+                       // package
+                       IPackageFragmentRoot root = project.getPackageFragmentRoot(file
+                                       .getParent());
+                       pkg = root
+                                       .getPackageFragment(IPackageFragment.DEFAULT_PACKAGE_NAME);
+
+                       if (VERBOSE) {
+                               System.out
+                                               .println("WARNING : creating unit element outside classpath (" + Thread.currentThread() + "): " + file.getFullPath()); //$NON-NLS-1$//$NON-NLS-2$
+                       }
+               }
+               return pkg.getCompilationUnit(file.getName());
+       }
+
+       /**
+        * Creates and returns a handle for the given JAR file, its project being
+        * the given project. The Java model associated with the JAR's project may
+        * be created as a side effect. Returns <code>null</code> if unable to
+        * create a JAR package fragment root. (for example, if the JAR file
+        * represents a non-Java resource)
+        */
+       // public static IPackageFragmentRoot createJarPackageFragmentRootFrom(IFile
+       // file, IJavaProject project) {
+       // if (file == null) {
+       // return null;
+       // }
+       // if (project == null) {
+       // project = PHPCore.create(file.getProject());
+       // }
+       //
+       // // Create a jar package fragment root only if on the classpath
+       // IPath resourcePath = file.getFullPath();
+       // try {
+       // IClasspathEntry[] entries =
+       // ((JavaProject)project).getResolvedClasspath(true);
+       // for (int i = 0, length = entries.length; i < length; i++) {
+       // IClasspathEntry entry = entries[i];
+       // IPath rootPath = entry.getPath();
+       // if (rootPath.equals(resourcePath)) {
+       // return project.getPackageFragmentRoot(file);
+       // }
+       // }
+       // } catch (JavaModelException e) {
+       // }
+       // return null;
+       // }
+       /**
+        * Returns the package fragment root represented by the resource, or the
+        * package fragment the given resource is located in, or <code>null</code>
+        * if the given resource is not on the classpath of the given project.
+        */
+       public static IJavaElement determineIfOnClasspath(IResource resource,
+                       IJavaProject project) {
+
+               IPath resourcePath = resource.getFullPath();
+               try {
+                       IClasspathEntry[] entries = net.sourceforge.phpdt.internal.compiler.util.Util
+                                       .isJavaFileName(resourcePath.lastSegment()) ? project
+                                       .getRawClasspath() // JAVA file can only live inside SRC
+                                                                               // folder (on the raw path)
+                                       : ((JavaProject) project).getResolvedClasspath(true);
+
+                       for (int i = 0; i < entries.length; i++) {
+                               IClasspathEntry entry = entries[i];
+                               if (entry.getEntryKind() == IClasspathEntry.CPE_PROJECT)
+                                       continue;
+                               IPath rootPath = entry.getPath();
+                               if (rootPath.equals(resourcePath)) {
+                                       return project.getPackageFragmentRoot(resource);
+                               } else if (rootPath.isPrefixOf(resourcePath)
+                                               && !Util.isExcluded(resource, null,
+                                                               ((ClasspathEntry) entry)
+                                                                               .fullExclusionPatternChars())) {
+                                       // given we have a resource child of the root, it cannot be
+                                       // a JAR pkg root
+                                       IPackageFragmentRoot root = ((JavaProject) project)
+                                                       .getFolderPackageFragmentRoot(rootPath);
+                                       if (root == null)
+                                               return null;
+                                       IPath pkgPath = resourcePath.removeFirstSegments(rootPath
+                                                       .segmentCount());
+                                       if (resource.getType() == IResource.FILE) {
+                                               // if the resource is a file, then remove the last
+                                               // segment which
+                                               // is the file name in the package
+                                               pkgPath = pkgPath.removeLastSegments(1);
+
+                                               // don't check validity of package name (see
+                                               // http://bugs.eclipse.org/bugs/show_bug.cgi?id=26706)
+                                               // String pkgName = pkgPath.toString().replace('/',
+                                               // '.');
+                                               String pkgName = pkgPath.toString();
+                                               return root.getPackageFragment(pkgName);
+                                       } else {
+                                               String pkgName = Util.packageName(pkgPath);
+                                               if (pkgName == null) {// ||
+                                                                                               // JavaConventions.validatePackageName(pkgName).getSeverity()
+                                                                                               // == IStatus.ERROR) {
+                                                       return null;
+                                               }
+                                               return root.getPackageFragment(pkgName);
+                                       }
+                               }
+                       }
+               } catch (JavaModelException npe) {
+                       return null;
+               }
+               return null;
+       }
+
+       /**
+        * The singleton manager
+        */
+       private final static JavaModelManager Manager = new JavaModelManager();
+
+       /**
+        * Infos cache.
+        */
+       protected JavaModelCache cache = new JavaModelCache();
+
+       /*
+        * Temporary cache of newly opened elements
+        */
+       private ThreadLocal temporaryCache = new ThreadLocal();
+
+       /**
+        * Set of elements which are out of sync with their buffers.
+        */
+       protected Map elementsOutOfSynchWithBuffers = new HashMap(11);
+
+       /**
+        * Holds the state used for delta processing.
+        */
+       public DeltaProcessingState deltaState = new DeltaProcessingState();
+
+       /**
+        * Turns delta firing on/off. By default it is on.
+        */
+       private boolean isFiring = true;
+
+       /**
+        * Queue of deltas created explicily by the Java Model that have yet to be
+        * fired.
+        */
+       ArrayList javaModelDeltas = new ArrayList();
+
+       /**
+        * Queue of reconcile deltas on working copies that have yet to be fired.
+        * This is a table form IWorkingCopy to IJavaElementDelta
+        */
+       HashMap reconcileDeltas = new HashMap();
+
+       /**
+        * Collection of listeners for Java element deltas
+        */
+       private IElementChangedListener[] elementChangedListeners = new IElementChangedListener[5];
+
+       private int[] elementChangedListenerMasks = new int[5];
+
+       private int elementChangedListenerCount = 0;
+
+       public int currentChangeEventType = ElementChangedEvent.PRE_AUTO_BUILD;
+
+       public static final int DEFAULT_CHANGE_EVENT = 0; // must not collide with
+                                                                                                               // ElementChangedEvent
+                                                                                                               // event masks
+
+       /**
+        * Used to convert <code>IResourceDelta</code>s into
+        * <code>IJavaElementDelta</code>s.
+        */
+       // public final DeltaProcessor deltaProcessor = new DeltaProcessor(this);
+       /**
+        * Used to update the JavaModel for <code>IJavaElementDelta</code>s.
+        */
+       private final ModelUpdater modelUpdater = new ModelUpdater();
+
+       /**
+        * Workaround for bug 15168 circular errors not reported This is a cache of
+        * the projects before any project addition/deletion has started.
+        */
+       public IJavaProject[] javaProjectsCache;
+
+       /**
+        * Table from IProject to PerProjectInfo. NOTE: this object itself is used
+        * as a lock to synchronize creation/removal of per project infos
+        */
+       protected Map perProjectInfo = new HashMap(5);
+
+       /**
+        * A map from ICompilationUnit to IWorkingCopy of the shared working copies.
+        */
+       public Map sharedWorkingCopies = new HashMap();
+
+       /**
+        * A weak set of the known scopes.
+        */
+       protected WeakHashMap searchScopes = new WeakHashMap();
+
+       // public static class PerProjectInfo {
+       // public IProject project;
+       // public Object savedState;
+       // public boolean triedRead;
+       // public IClasspathEntry[] classpath;
+       // public IClasspathEntry[] lastResolvedClasspath;
+       // public Map resolvedPathToRawEntries; // reverse map from resolved path to
+       // raw entries
+       // public IPath outputLocation;
+       // public Preferences preferences;
+       // public PerProjectInfo(IProject project) {
+       //
+       // this.triedRead = false;
+       // this.savedState = null;
+       // this.project = project;
+       // }
+       // }
+
+       public static class PerProjectInfo {
+
+               public IProject project;
+
+               public Object savedState;
+
+               public boolean triedRead;
+
+               public IClasspathEntry[] rawClasspath;
+
+               public IClasspathEntry[] resolvedClasspath;
+
+               public Map resolvedPathToRawEntries; // reverse map from resolved
+                                                                                               // path to raw entries
+
+               public IPath outputLocation;
+
+               public Preferences preferences;
+
+               public PerProjectInfo(IProject project) {
+
+                       this.triedRead = false;
+                       this.savedState = null;
+                       this.project = project;
+               }
+
+               // updating raw classpath need to flush obsoleted cached information
+               // about resolved entries
+               public synchronized void updateClasspathInformation(
+                               IClasspathEntry[] newRawClasspath) {
+
+                       this.rawClasspath = newRawClasspath;
+                       this.resolvedClasspath = null;
+                       this.resolvedPathToRawEntries = null;
+               }
+
+               public String toString() {
+                       StringBuffer buffer = new StringBuffer();
+                       buffer.append("Info for "); //$NON-NLS-1$
+                       buffer.append(this.project.getFullPath());
+                       buffer.append("\nRaw classpath:\n"); //$NON-NLS-1$
+                       if (this.rawClasspath == null) {
+                               buffer.append("  <null>\n"); //$NON-NLS-1$
+                       } else {
+                               for (int i = 0, length = this.rawClasspath.length; i < length; i++) {
+                                       buffer.append("  "); //$NON-NLS-1$
+                                       buffer.append(this.rawClasspath[i]);
+                                       buffer.append('\n');
+                               }
+                       }
+                       buffer.append("Resolved classpath:\n"); //$NON-NLS-1$
+                       IClasspathEntry[] resolvedCP = this.resolvedClasspath;
+                       if (resolvedCP == null) {
+                               buffer.append("  <null>\n"); //$NON-NLS-1$
+                       } else {
+                               for (int i = 0, length = resolvedCP.length; i < length; i++) {
+                                       buffer.append("  "); //$NON-NLS-1$
+                                       buffer.append(resolvedCP[i]);
+                                       buffer.append('\n');
+                               }
+                       }
+                       buffer.append("Output location:\n  "); //$NON-NLS-1$
+                       if (this.outputLocation == null) {
+                               buffer.append("<null>"); //$NON-NLS-1$
+                       } else {
+                               buffer.append(this.outputLocation);
+                       }
+                       return buffer.toString();
+               }
+       }
+
+       public static class PerWorkingCopyInfo implements IProblemRequestor {
+               int useCount = 0;
+
+               IProblemRequestor problemRequestor;
+
+               ICompilationUnit workingCopy;
+
+               public PerWorkingCopyInfo(ICompilationUnit workingCopy,
+                               IProblemRequestor problemRequestor) {
+                       this.workingCopy = workingCopy;
+                       this.problemRequestor = problemRequestor;
+               }
+
+               public void acceptProblem(IProblem problem) {
+                       if (this.problemRequestor == null)
+                               return;
+                       this.problemRequestor.acceptProblem(problem);
+               }
+
+               public void beginReporting() {
+                       if (this.problemRequestor == null)
+                               return;
+                       this.problemRequestor.beginReporting();
+               }
+
+               public void endReporting() {
+                       if (this.problemRequestor == null)
+                               return;
+                       this.problemRequestor.endReporting();
+               }
+
+               public ICompilationUnit getWorkingCopy() {
+                       return this.workingCopy;
+               }
+
+               public boolean isActive() {
+                       return this.problemRequestor != null
+                                       && this.problemRequestor.isActive();
+               }
+
+               public String toString() {
+                       StringBuffer buffer = new StringBuffer();
+                       buffer.append("Info for "); //$NON-NLS-1$
+                       buffer.append(((JavaElement) workingCopy).toStringWithAncestors());
+                       buffer.append("\nUse count = "); //$NON-NLS-1$
+                       buffer.append(this.useCount);
+                       buffer.append("\nProblem requestor:\n  "); //$NON-NLS-1$
+                       buffer.append(this.problemRequestor);
+                       return buffer.toString();
+               }
+       }
+
+       public static boolean VERBOSE = false;
+
+       public static boolean CP_RESOLVE_VERBOSE = false;
+
+       public static boolean ZIP_ACCESS_VERBOSE = false;
+
+       /**
+        * A cache of opened zip files per thread. (map from Thread to map of IPath
+        * to java.io.ZipFile) NOTE: this object itself is used as a lock to
+        * synchronize creation/removal of entries
+        */
+       private HashMap zipFiles = new HashMap();
+
+       /**
+        * Update the classpath variable cache
+        */
+       public static class PluginPreferencesListener implements
+                       Preferences.IPropertyChangeListener {
+               /**
+                * @see org.eclipse.core.runtime.Preferences.IPropertyChangeListener#propertyChange(PropertyChangeEvent)
+                */
+               public void propertyChange(Preferences.PropertyChangeEvent event) {
+                       // TODO : jsurfer temp-del
+                       // String propertyName = event.getProperty();
+                       // if (propertyName.startsWith(CP_VARIABLE_PREFERENCES_PREFIX)) {
+                       // String varName =
+                       // propertyName.substring(CP_VARIABLE_PREFERENCES_PREFIX.length());
+                       // String newValue = (String)event.getNewValue();
+                       // if (newValue != null && !(newValue =
+                       // newValue.trim()).equals(CP_ENTRY_IGNORE)) {
+                       // Variables.put(varName, new Path(newValue));
+                       // } else {
+                       // Variables.remove(varName);
+                       // }
+                       // }
+                       // if (propertyName.startsWith(CP_CONTAINER_PREFERENCES_PREFIX)) {
+                       // recreatePersistedContainer(propertyName,
+                       // (String)event.getNewValue(), false);
+                       // }
+               }
+       }
+
+       /**
+        * Line separator to use throughout the JavaModel for any source edit
+        * operation
+        */
+       public static String LINE_SEPARATOR = System.getProperty("line.separator"); //$NON-NLS-1$
+
+       /**
+        * Constructs a new JavaModelManager
+        */
+       private JavaModelManager() {
+       }
+
+       /**
+        * @deprecated - discard once debug has converted to not using it
+        */
+       public void addElementChangedListener(IElementChangedListener listener) {
+               this.addElementChangedListener(listener,
+                               ElementChangedEvent.POST_CHANGE
+                                               | ElementChangedEvent.POST_RECONCILE);
+       }
+
+       /**
+        * addElementChangedListener method comment. Need to clone defensively the
+        * listener information, in case some listener is reacting to some
+        * notification iteration by adding/changing/removing any of the other (for
+        * example, if it deregisters itself).
+        */
+       public void addElementChangedListener(IElementChangedListener listener,
+                       int eventMask) {
+               for (int i = 0; i < this.elementChangedListenerCount; i++) {
+                       if (this.elementChangedListeners[i].equals(listener)) {
+
+                               // only clone the masks, since we could be in the middle of
+                               // notifications and one listener decide to change
+                               // any event mask of another listeners (yet not notified).
+                               int cloneLength = this.elementChangedListenerMasks.length;
+                               System
+                                               .arraycopy(
+                                                               this.elementChangedListenerMasks,
+                                                               0,
+                                                               this.elementChangedListenerMasks = new int[cloneLength],
+                                                               0, cloneLength);
+                               this.elementChangedListenerMasks[i] = eventMask; // could be
+                                                                                                                                       // different
+                               return;
+                       }
+               }
+               // may need to grow, no need to clone, since iterators will have cached
+               // original arrays and max boundary and we only add to the end.
+               int length;
+               if ((length = this.elementChangedListeners.length) == this.elementChangedListenerCount) {
+                       System
+                                       .arraycopy(
+                                                       this.elementChangedListeners,
+                                                       0,
+                                                       this.elementChangedListeners = new IElementChangedListener[length * 2],
+                                                       0, length);
+                       System.arraycopy(this.elementChangedListenerMasks, 0,
+                                       this.elementChangedListenerMasks = new int[length * 2], 0,
+                                       length);
+               }
+               this.elementChangedListeners[this.elementChangedListenerCount] = listener;
+               this.elementChangedListenerMasks[this.elementChangedListenerCount] = eventMask;
+               this.elementChangedListenerCount++;
+       }
+
+       /**
+        * Starts caching ZipFiles. Ignores if there are already clients.
+        */
+       public void cacheZipFiles() {
+               synchronized (this.zipFiles) {
+                       Thread currentThread = Thread.currentThread();
+                       if (this.zipFiles.get(currentThread) != null)
+                               return;
+                       this.zipFiles.put(currentThread, new HashMap());
+               }
+       }
+
+       public void closeZipFile(ZipFile zipFile) {
+               if (zipFile == null)
+                       return;
+               synchronized (this.zipFiles) {
+                       if (this.zipFiles.get(Thread.currentThread()) != null) {
+                               return; // zip file will be closed by call to flushZipFiles
+                       }
+                       try {
+                               if (JavaModelManager.ZIP_ACCESS_VERBOSE) {
+                                       System.out
+                                                       .println("(" + Thread.currentThread() + ") [JavaModelManager.closeZipFile(ZipFile)] Closing ZipFile on " + zipFile.getName()); //$NON-NLS-1$    //$NON-NLS-2$
+                               }
+                               zipFile.close();
+                       } catch (IOException e) {
+                       }
+               }
+       }
+
+       /**
+        * Configure the plugin with respect to option settings defined in
+        * ".options" file
+        */
+       public void configurePluginDebugOptions() {
+               if (JavaCore.getPlugin().isDebugging()) {
+                       // TODO jsurfer temp-del
+
+                       String option = Platform.getDebugOption(BUILDER_DEBUG);
+                       // if(option != null) JavaBuilder.DEBUG =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+                       //
+                       // option = Platform.getDebugOption(COMPILER_DEBUG);
+                       // if(option != null) Compiler.DEBUG =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+                       //
+                       // option = Platform.getDebugOption(COMPLETION_DEBUG);
+                       // if(option != null) CompletionEngine.DEBUG =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+                       //
+                       option = Platform.getDebugOption(CP_RESOLVE_DEBUG);
+                       if (option != null)
+                               JavaModelManager.CP_RESOLVE_VERBOSE = option
+                                               .equalsIgnoreCase("true"); //$NON-NLS-1$
+
+                       option = Platform.getDebugOption(DELTA_DEBUG);
+                       if (option != null)
+                               DeltaProcessor.VERBOSE = option.equalsIgnoreCase("true"); //$NON-NLS-1$
+
+                       // option = Platform.getDebugOption(HIERARCHY_DEBUG);
+                       // if(option != null) TypeHierarchy.DEBUG =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+                       //
+                       // option = Platform.getDebugOption(INDEX_MANAGER_DEBUG);
+                       // if(option != null) IndexManager.VERBOSE =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+
+                       option = Platform.getDebugOption(JAVAMODEL_DEBUG);
+                       if (option != null)
+                               JavaModelManager.VERBOSE = option.equalsIgnoreCase("true"); //$NON-NLS-1$
+
+                       option = Platform.getDebugOption(POST_ACTION_DEBUG);
+                       if (option != null)
+                               JavaModelOperation.POST_ACTION_VERBOSE = option
+                                               .equalsIgnoreCase("true"); //$NON-NLS-1$
+
+                       // option = Platform.getDebugOption(SEARCH_DEBUG);
+                       // if(option != null) SearchEngine.VERBOSE =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+                       //
+                       // option = Platform.getDebugOption(SELECTION_DEBUG);
+                       // if(option != null) SelectionEngine.DEBUG =
+                       // option.equalsIgnoreCase("true") ; //$NON-NLS-1$
+
+                       option = Platform.getDebugOption(ZIP_ACCESS_DEBUG);
+                       if (option != null)
+                               JavaModelManager.ZIP_ACCESS_VERBOSE = option
+                                               .equalsIgnoreCase("true"); //$NON-NLS-1$
+               }
+       }
+
+       /*
+        * Discards the per working copy info for the given working copy (making it
+        * a compilation unit) if its use count was 1. Otherwise, just decrement the
+        * use count. If the working copy is primary, computes the delta between its
+        * state and the original compilation unit and register it. Close the
+        * working copy, its buffer and remove it from the shared working copy
+        * table. Ignore if no per-working copy info existed. NOTE: it must be
+        * synchronized as it may interact with the element info cache (if useCount
+        * is decremented to 0), see bug 50667. Returns the new use count (or -1 if
+        * it didn't exist).
+        */
+       public synchronized int discardPerWorkingCopyInfo(
+                       CompilationUnit workingCopy) throws JavaModelException {
+               synchronized (perWorkingCopyInfos) {
+                       WorkingCopyOwner owner = workingCopy.owner;
+                       Map workingCopyToInfos = (Map) this.perWorkingCopyInfos.get(owner);
+                       if (workingCopyToInfos == null)
+                               return -1;
+
+                       PerWorkingCopyInfo info = (PerWorkingCopyInfo) workingCopyToInfos
+                                       .get(workingCopy);
+                       if (info == null)
+                               return -1;
+
+                       if (--info.useCount == 0) {
+                               // create the delta builder (this remembers the current content
+                               // of the working copy)
+                               JavaElementDeltaBuilder deltaBuilder = null;
+                               if (workingCopy.isPrimary()) {
+                                       deltaBuilder = new JavaElementDeltaBuilder(workingCopy);
+                               }
+
+                               // remove per working copy info
+                               workingCopyToInfos.remove(workingCopy);
+                               if (workingCopyToInfos.isEmpty()) {
+                                       this.perWorkingCopyInfos.remove(owner);
+                               }
+
+                               // remove infos + close buffer (since no longer working copy)
+                               removeInfoAndChildren(workingCopy);
+                               workingCopy.closeBuffer();
+
+                               // compute the delta if needed and register it if there are
+                               // changes
+                               if (deltaBuilder != null) {
+                                       deltaBuilder.buildDeltas();
+                                       if ((deltaBuilder.delta != null)
+                                                       && (deltaBuilder.delta.getAffectedChildren().length > 0)) {
+                                               getDeltaProcessor().registerJavaModelDelta(
+                                                               deltaBuilder.delta);
+                                       }
+                               }
+
+                       }
+                       return info.useCount;
+               }
+       }
+
+       /**
+        * @see ISaveParticipant
+        */
+       public void doneSaving(ISaveContext context) {
+       }
+
+       /**
+        * Fire Java Model delta, flushing them after the fact after post_change
+        * notification. If the firing mode has been turned off, this has no effect.
+        */
+       public void fire(IJavaElementDelta customDelta, int eventType) {
+
+               if (!this.isFiring)
+                       return;
+
+               if (DeltaProcessor.VERBOSE
+                               && (eventType == DEFAULT_CHANGE_EVENT || eventType == ElementChangedEvent.PRE_AUTO_BUILD)) {
+                       System.out
+                                       .println("-----------------------------------------------------------------------------------------------------------------------");//$NON-NLS-1$
+               }
+
+               IJavaElementDelta deltaToNotify;
+               if (customDelta == null) {
+                       deltaToNotify = this.mergeDeltas(this.javaModelDeltas);
+               } else {
+                       deltaToNotify = customDelta;
+               }
+
+               // Refresh internal scopes
+               if (deltaToNotify != null) {
+                       // TODO temp-del
+                       // Iterator scopes = this.scopes.keySet().iterator();
+                       // while (scopes.hasNext()) {
+                       // AbstractSearchScope scope = (AbstractSearchScope)scopes.next();
+                       // scope.processDelta(deltaToNotify);
+                       // }
+               }
+
+               // Notification
+
+               // Important: if any listener reacts to notification by updating the
+               // listeners list or mask, these lists will
+               // be duplicated, so it is necessary to remember original lists in a
+               // variable (since field values may change under us)
+               IElementChangedListener[] listeners = this.elementChangedListeners;
+               int[] listenerMask = this.elementChangedListenerMasks;
+               int listenerCount = this.elementChangedListenerCount;
+
+               switch (eventType) {
+               case DEFAULT_CHANGE_EVENT:
+                       firePreAutoBuildDelta(deltaToNotify, listeners, listenerMask,
+                                       listenerCount);
+                       firePostChangeDelta(deltaToNotify, listeners, listenerMask,
+                                       listenerCount);
+                       fireReconcileDelta(listeners, listenerMask, listenerCount);
+                       break;
+               case ElementChangedEvent.PRE_AUTO_BUILD:
+                       firePreAutoBuildDelta(deltaToNotify, listeners, listenerMask,
+                                       listenerCount);
+                       break;
+               case ElementChangedEvent.POST_CHANGE:
+                       firePostChangeDelta(deltaToNotify, listeners, listenerMask,
+                                       listenerCount);
+                       fireReconcileDelta(listeners, listenerMask, listenerCount);
+                       break;
+               }
+
+       }
+
+       private void firePreAutoBuildDelta(IJavaElementDelta deltaToNotify,
+                       IElementChangedListener[] listeners, int[] listenerMask,
+                       int listenerCount) {
+
+               if (DeltaProcessor.VERBOSE) {
+                       System.out
+                                       .println("FIRING PRE_AUTO_BUILD Delta [" + Thread.currentThread() + "]:"); //$NON-NLS-1$//$NON-NLS-2$
+                       System.out
+                                       .println(deltaToNotify == null ? "<NONE>" : deltaToNotify.toString()); //$NON-NLS-1$
+               }
+               if (deltaToNotify != null) {
+                       notifyListeners(deltaToNotify, ElementChangedEvent.PRE_AUTO_BUILD,
+                                       listeners, listenerMask, listenerCount);
+               }
+       }
+
+       private void firePostChangeDelta(IJavaElementDelta deltaToNotify,
+                       IElementChangedListener[] listeners, int[] listenerMask,
+                       int listenerCount) {
+
+               // post change deltas
+               if (DeltaProcessor.VERBOSE) {
+                       System.out
+                                       .println("FIRING POST_CHANGE Delta [" + Thread.currentThread() + "]:"); //$NON-NLS-1$//$NON-NLS-2$
+                       System.out
+                                       .println(deltaToNotify == null ? "<NONE>" : deltaToNotify.toString()); //$NON-NLS-1$
+               }
+               if (deltaToNotify != null) {
+                       // flush now so as to keep listener reactions to post their own
+                       // deltas for subsequent iteration
+                       this.flush();
+
+                       notifyListeners(deltaToNotify, ElementChangedEvent.POST_CHANGE,
+                                       listeners, listenerMask, listenerCount);
+               }
+       }
+
+       private void fireReconcileDelta(IElementChangedListener[] listeners,
+                       int[] listenerMask, int listenerCount) {
+
+               IJavaElementDelta deltaToNotify = mergeDeltas(this.reconcileDeltas
+                               .values());
+               if (DeltaProcessor.VERBOSE) {
+                       System.out
+                                       .println("FIRING POST_RECONCILE Delta [" + Thread.currentThread() + "]:"); //$NON-NLS-1$//$NON-NLS-2$
+                       System.out
+                                       .println(deltaToNotify == null ? "<NONE>" : deltaToNotify.toString()); //$NON-NLS-1$
+               }
+               if (deltaToNotify != null) {
+                       // flush now so as to keep listener reactions to post their own
+                       // deltas for subsequent iteration
+                       this.reconcileDeltas = new HashMap();
+
+                       notifyListeners(deltaToNotify, ElementChangedEvent.POST_RECONCILE,
+                                       listeners, listenerMask, listenerCount);
+               }
+       }
+
+       public void notifyListeners(IJavaElementDelta deltaToNotify, int eventType,
+                       IElementChangedListener[] listeners, int[] listenerMask,
+                       int listenerCount) {
+               final ElementChangedEvent extraEvent = new ElementChangedEvent(
+                               deltaToNotify, eventType);
+               for (int i = 0; i < listenerCount; i++) {
+                       if ((listenerMask[i] & eventType) != 0) {
+                               final IElementChangedListener listener = listeners[i];
+                               long start = -1;
+                               if (DeltaProcessor.VERBOSE) {
+                                       System.out
+                                                       .print("Listener #" + (i + 1) + "=" + listener.toString());//$NON-NLS-1$//$NON-NLS-2$
+                                       start = System.currentTimeMillis();
+                               }
+                               // wrap callbacks with Safe runnable for subsequent listeners to
+                               // be called when some are causing grief
+                               Platform.run(new ISafeRunnable() {
+                                       public void handleException(Throwable exception) {
+                                               Util
+                                                               .log(exception,
+                                                                               "Exception occurred in listener of Java element change notification"); //$NON-NLS-1$
+                                       }
+
+                                       public void run() throws Exception {
+                                               listener.elementChanged(extraEvent);
+                                       }
+                               });
+                               if (DeltaProcessor.VERBOSE) {
+                                       System.out
+                                                       .println(" -> " + (System.currentTimeMillis() - start) + "ms"); //$NON-NLS-1$ //$NON-NLS-2$
+                               }
+                       }
+               }
+       }
+
+       /**
+        * Flushes all deltas without firing them.
+        */
+       protected void flush() {
+               this.javaModelDeltas = new ArrayList();
+       }
+
+       /**
+        * Flushes ZipFiles cache if there are no more clients.
+        */
+       public void flushZipFiles() {
+               synchronized (this.zipFiles) {
+                       Thread currentThread = Thread.currentThread();
+                       HashMap map = (HashMap) this.zipFiles.remove(currentThread);
+                       if (map == null)
+                               return;
+                       Iterator iterator = map.values().iterator();
+                       while (iterator.hasNext()) {
+                               try {
+                                       ZipFile zipFile = (ZipFile) iterator.next();
+                                       if (JavaModelManager.ZIP_ACCESS_VERBOSE) {
+                                               System.out
+                                                               .println("(" + currentThread + ") [JavaModelManager.flushZipFiles()] Closing ZipFile on " + zipFile.getName()); //$NON-NLS-1$//$NON-NLS-2$
+                                       }
+                                       zipFile.close();
+                               } catch (IOException e) {
+                               }
+                       }
+               }
+       }
+
+       public DeltaProcessor getDeltaProcessor() {
+               return this.deltaState.getDeltaProcessor();
+       }
+
+       /**
+        * Returns the set of elements which are out of synch with their buffers.
+        */
+       protected Map getElementsOutOfSynchWithBuffers() {
+               return this.elementsOutOfSynchWithBuffers;
+       }
+
+       // public IndexManager getIndexManager() {
+       // return this.indexManager;
+       // }
+       /**
+        * Returns the <code>IJavaElement</code> represented by the
+        * <code>String</code> memento.
+        */
+       public IJavaElement getHandleFromMemento(String memento)
+                       throws JavaModelException {
+               if (memento == null) {
+                       return null;
+               }
+               JavaModel model = (JavaModel) getJavaModel();
+               if (memento.equals("")) { // workspace memento //$NON-NLS-1$
+                       return model;
+               }
+               int modelEnd = memento.indexOf(JavaElement.JEM_JAVAPROJECT);
+               if (modelEnd == -1) {
+                       return null;
+               }
+               boolean returnProject = false;
+               int projectEnd = memento.indexOf(JavaElement.JEM_PACKAGEFRAGMENTROOT,
+                               modelEnd);
+               if (projectEnd == -1) {
+                       projectEnd = memento.length();
+                       returnProject = true;
+               }
+               String projectName = memento.substring(modelEnd + 1, projectEnd);
+               JavaProject proj = (JavaProject) model.getJavaProject(projectName);
+               if (returnProject) {
+                       return proj;
+               }
+               int rootEnd = memento.indexOf(JavaElement.JEM_PACKAGEFRAGMENT,
+                               projectEnd + 1);
+               // TODO temp-del
+               // if (rootEnd == -1) {
+               // return model.getHandleFromMementoForRoot(memento, proj, projectEnd,
+               // memento.length());
+               // }
+               // IPackageFragmentRoot root =
+               // model.getHandleFromMementoForRoot(memento, proj, projectEnd,
+               // rootEnd);
+               // if (root == null)
+               // return null;
+               //
+               // int end= memento.indexOf(JavaElement.JEM_COMPILATIONUNIT, rootEnd);
+               // if (end == -1) {
+               // end= memento.indexOf(JavaElement.JEM_CLASSFILE, rootEnd);
+               // if (end == -1) {
+               // if (rootEnd + 1 == memento.length()) {
+               // return
+               // root.getPackageFragment(IPackageFragment.DEFAULT_PACKAGE_NAME);
+               // } else {
+               // return root.getPackageFragment(memento.substring(rootEnd + 1));
+               // }
+               // }
+               // //deal with class file and binary members
+               // return model.getHandleFromMementoForBinaryMembers(memento, root,
+               // rootEnd, end);
+               // }
+               //
+               // //deal with compilation units and source members
+               // return model.getHandleFromMementoForSourceMembers(memento, root,
+               // rootEnd, end);
+               return null;
+       }
+
+       // public IndexManager getIndexManager() {
+       // return this.deltaProcessor.indexManager;
+       // }
+
+       /**
+        * Returns the info for the element.
+        */
+       public Object getInfo(IJavaElement element) {
+               return this.cache.getInfo(element);
+       }
+
+       /**
+        * Returns the handle to the active Java Model.
+        */
+       public final JavaModel getJavaModel() {
+               return javaModel;
+       }
+
+       /**
+        * Returns the singleton JavaModelManager
+        */
+       public final static JavaModelManager getJavaModelManager() {
+               return Manager;
+       }
+
+       /**
+        * Returns the last built state for the given project, or null if there is
+        * none. Deserializes the state if necessary.
+        * 
+        * For use by image builder and evaluation support only
+        */
+       public Object getLastBuiltState(IProject project, IProgressMonitor monitor) {
+               if (!JavaProject.hasJavaNature(project))
+                       return null; // should never be requested on non-Java projects
+               PerProjectInfo info = getPerProjectInfo(project, true/*
+                                                                                                                                * create if
+                                                                                                                                * missing
+                                                                                                                                */);
+               if (!info.triedRead) {
+                       info.triedRead = true;
+                       try {
+                               if (monitor != null)
+                                       monitor.subTask(Util.bind(
+                                                       "build.readStateProgress", project.getName())); //$NON-NLS-1$
+                               info.savedState = readState(project);
+                       } catch (CoreException e) {
+                               e.printStackTrace();
+                       }
+               }
+               return info.savedState;
+       }
+
+       /*
+        * Returns the per-project info for the given project. If specified, create
+        * the info if the info doesn't exist.
+        */
+       public PerProjectInfo getPerProjectInfo(IProject project, boolean create) {
+               synchronized (perProjectInfo) { // use the perProjectInfo collection as
+                                                                               // its own lock
+                       PerProjectInfo info = (PerProjectInfo) perProjectInfo.get(project);
+                       if (info == null && create) {
+                               info = new PerProjectInfo(project);
+                               perProjectInfo.put(project, info);
+                       }
+                       return info;
+               }
+       }
+
+       /*
+        * Returns the per-project info for the given project. If the info doesn't
+        * exist, check for the project existence and create the info. @throws
+        * JavaModelException if the project doesn't exist.
+        */
+       public PerProjectInfo getPerProjectInfoCheckExistence(IProject project)
+                       throws JavaModelException {
+               JavaModelManager.PerProjectInfo info = getPerProjectInfo(project, false /*
+                                                                                                                                                                * don't
+                                                                                                                                                                * create
+                                                                                                                                                                * info
+                                                                                                                                                                */);
+               if (info == null) {
+                       if (!JavaProject.hasJavaNature(project)) {
+                               throw ((JavaProject) JavaCore.create(project))
+                                               .newNotPresentException();
+                       }
+                       info = getPerProjectInfo(project, true /* create info */);
+               }
+               return info;
+       }
+
+       /*
+        * Returns the per-working copy info for the given working copy at the given
+        * path. If it doesn't exist and if create, add a new per-working copy info
+        * with the given problem requestor. If recordUsage, increment the
+        * per-working copy info's use count. Returns null if it doesn't exist and
+        * not create.
+        */
+       public PerWorkingCopyInfo getPerWorkingCopyInfo(
+                       CompilationUnit workingCopy, boolean create, boolean recordUsage,
+                       IProblemRequestor problemRequestor) {
+               synchronized (perWorkingCopyInfos) { // use the perWorkingCopyInfo
+                                                                                               // collection as its own lock
+                       WorkingCopyOwner owner = workingCopy.owner;
+                       Map workingCopyToInfos = (Map) this.perWorkingCopyInfos.get(owner);
+                       if (workingCopyToInfos == null && create) {
+                               workingCopyToInfos = new HashMap();
+                               this.perWorkingCopyInfos.put(owner, workingCopyToInfos);
+                       }
+
+                       PerWorkingCopyInfo info = workingCopyToInfos == null ? null
+                                       : (PerWorkingCopyInfo) workingCopyToInfos.get(workingCopy);
+                       if (info == null && create) {
+                               info = new PerWorkingCopyInfo(workingCopy, problemRequestor);
+                               workingCopyToInfos.put(workingCopy, info);
+                       }
+                       if (info != null && recordUsage)
+                               info.useCount++;
+                       return info;
+               }
+       }
+
+       /**
+        * Returns the name of the variables for which an CP variable initializer is
+        * registered through an extension point
+        */
+       public static String[] getRegisteredVariableNames() {
+
+               Plugin jdtCorePlugin = JavaCore.getPlugin();
+               if (jdtCorePlugin == null)
+                       return null;
+
+               ArrayList variableList = new ArrayList(5);
+               // IExtensionPoint extension =
+               // jdtCorePlugin.getDescriptor().getExtensionPoint(JavaModelManager.CPVARIABLE_INITIALIZER_EXTPOINT_ID);
+               // if (extension != null) {
+               // IExtension[] extensions = extension.getExtensions();
+               // for(int i = 0; i < extensions.length; i++){
+               // IConfigurationElement [] configElements =
+               // extensions[i].getConfigurationElements();
+               // for(int j = 0; j < configElements.length; j++){
+               // String varAttribute = configElements[j].getAttribute("variable");
+               // //$NON-NLS-1$
+               // if (varAttribute != null) variableList.add(varAttribute);
+               // }
+               // }
+               // }
+               String[] variableNames = new String[variableList.size()];
+               variableList.toArray(variableNames);
+               return variableNames;
+       }
+
+       /**
+        * Returns the name of the container IDs for which an CP container
+        * initializer is registered through an extension point
+        */
+       // public static String[] getRegisteredContainerIDs(){
+       //
+       // Plugin jdtCorePlugin = PHPCore.getPlugin();
+       // if (jdtCorePlugin == null) return null;
+       //
+       // ArrayList containerIDList = new ArrayList(5);
+       // IExtensionPoint extension =
+       // jdtCorePlugin.getDescriptor().getExtensionPoint(JavaModelManager.CPCONTAINER_INITIALIZER_EXTPOINT_ID);
+       // if (extension != null) {
+       // IExtension[] extensions = extension.getExtensions();
+       // for(int i = 0; i < extensions.length; i++){
+       // IConfigurationElement [] configElements =
+       // extensions[i].getConfigurationElements();
+       // for(int j = 0; j < configElements.length; j++){
+       // String idAttribute = configElements[j].getAttribute("id"); //$NON-NLS-1$
+       // if (idAttribute != null) containerIDList.add(idAttribute);
+       // }
+       // }
+       // }
+       // String[] containerIDs = new String[containerIDList.size()];
+       // containerIDList.toArray(containerIDs);
+       // return containerIDs;
+       // }
+       /**
+        * Returns the File to use for saving and restoring the last built state for
+        * the given project.
+        */
+       private File getSerializationFile(IProject project) {
+               if (!project.exists())
+                       return null;
+               IPath workingLocation = project.getWorkingLocation(JavaCore.PLUGIN_ID);
+               return workingLocation.append("state.dat").toFile(); //$NON-NLS-1$
+       }
+
+       /*
+        * Returns the temporary cache for newly opened elements for the current
+        * thread. Creates it if not already created.
+        */
+       public HashMap getTemporaryCache() {
+               HashMap result = (HashMap) this.temporaryCache.get();
+               if (result == null) {
+                       result = new HashMap();
+                       this.temporaryCache.set(result);
+               }
+               return result;
+       }
+
+       /**
+        * Returns the open ZipFile at the given location. If the ZipFile does not
+        * yet exist, it is created, opened, and added to the cache of open
+        * ZipFiles. The location must be a absolute path.
+        * 
+        * @exception CoreException
+        *                If unable to create/open the ZipFile
+        */
+       public ZipFile getZipFile(IPath path) throws CoreException {
+
+               synchronized (this.zipFiles) { // TODO: use PeThreadObject which does
+                                                                               // synchronization
+                       Thread currentThread = Thread.currentThread();
+                       HashMap map = null;
+                       ZipFile zipFile;
+                       if ((map = (HashMap) this.zipFiles.get(currentThread)) != null
+                                       && (zipFile = (ZipFile) map.get(path)) != null) {
+
+                               return zipFile;
+                       }
+                       String fileSystemPath = null;
+                       IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
+                       IResource file = root.findMember(path);
+                       if (path.isAbsolute() && file != null) {
+                               if (file == null) { // external file
+                                       fileSystemPath = path.toOSString();
+                               } else { // internal resource (not an IFile or not existing)
+                                       IPath location;
+                                       if (file.getType() != IResource.FILE
+                                                       || (location = file.getLocation()) == null) {
+                                               throw new CoreException(
+                                                               new Status(
+                                                                               IStatus.ERROR,
+                                                                               JavaCore.PLUGIN_ID,
+                                                                               -1,
+                                                                               Util
+                                                                                               .bind(
+                                                                                                               "file.notFound", path.toString()), null)); //$NON-NLS-1$
+                                       }
+                                       fileSystemPath = location.toOSString();
+                               }
+                       } else if (!path.isAbsolute()) {
+                               file = root.getFile(path);
+                               if (file == null || file.getType() != IResource.FILE) {
+                                       throw new CoreException(new Status(IStatus.ERROR,
+                                                       JavaCore.PLUGIN_ID, -1, Util.bind(
+                                                                       "file.notFound", path.toString()), null)); //$NON-NLS-1$
+                               }
+                               IPath location = file.getLocation();
+                               if (location == null) {
+                                       throw new CoreException(new Status(IStatus.ERROR,
+                                                       JavaCore.PLUGIN_ID, -1, Util.bind(
+                                                                       "file.notFound", path.toString()), null)); //$NON-NLS-1$
+                               }
+                               fileSystemPath = location.toOSString();
+                       } else {
+                               fileSystemPath = path.toOSString();
+                       }
+
+                       try {
+                               if (ZIP_ACCESS_VERBOSE) {
+                                       System.out
+                                                       .println("(" + currentThread + ") [JavaModelManager.getZipFile(IPath)] Creating ZipFile on " + fileSystemPath); //$NON-NLS-1$ //$NON-NLS-2$
+                               }
+                               zipFile = new ZipFile(fileSystemPath);
+                               if (map != null) {
+                                       map.put(path, zipFile);
+                               }
+                               return zipFile;
+                       } catch (IOException e) {
+                               throw new CoreException(new Status(Status.ERROR,
+                                               JavaCore.PLUGIN_ID, -1,
+                                               Util.bind("status.IOException"), e)); //$NON-NLS-1$
+                       }
+               }
+       }
+
+       /*
+        * Returns whether there is a temporary cache for the current thread.
+        */
+       public boolean hasTemporaryCache() {
+               return this.temporaryCache.get() != null;
+       }
+
+       // public void loadVariablesAndContainers() throws CoreException {
+       //
+       // // backward compatibility, consider persistent property
+       // QualifiedName qName = new QualifiedName(PHPCore.PLUGIN_ID, "variables");
+       // //$NON-NLS-1$
+       // String xmlString =
+       // ResourcesPlugin.getWorkspace().getRoot().getPersistentProperty(qName);
+       //
+       // try {
+       // if (xmlString != null){
+       // StringReader reader = new StringReader(xmlString);
+       // Element cpElement;
+       // try {
+       // DocumentBuilder parser =
+       // DocumentBuilderFactory.newInstance().newDocumentBuilder();
+       // cpElement = parser.parse(new InputSource(reader)).getDocumentElement();
+       // } catch(SAXException e) {
+       // return;
+       // } catch(ParserConfigurationException e){
+       // return;
+       // } finally {
+       // reader.close();
+       // }
+       // if (cpElement == null) return;
+       // if (!cpElement.getNodeName().equalsIgnoreCase("variables")) {
+       // //$NON-NLS-1$
+       // return;
+       // }
+       //
+       // NodeList list= cpElement.getChildNodes();
+       // int length= list.getLength();
+       // for (int i= 0; i < length; ++i) {
+       // Node node= list.item(i);
+       // short type= node.getNodeType();
+       // if (type == Node.ELEMENT_NODE) {
+       // Element element= (Element) node;
+       // if (element.getNodeName().equalsIgnoreCase("variable")) { //$NON-NLS-1$
+       // variablePut(
+       // element.getAttribute("name"), //$NON-NLS-1$
+       // new Path(element.getAttribute("path"))); //$NON-NLS-1$
+       // }
+       // }
+       // }
+       // }
+       // } catch(IOException e){
+       // } finally {
+       // if (xmlString != null){
+       // ResourcesPlugin.getWorkspace().getRoot().setPersistentProperty(qName,
+       // null); // flush old one
+       // }
+       //
+       // }
+       //
+       // // load variables and containers from preferences into cache
+       // Preferences preferences =
+       // PHPeclipsePlugin.getDefault().getPluginPreferences();
+
+       // // only get variable from preferences not set to their default
+       // String[] propertyNames = preferences.propertyNames();
+       // int variablePrefixLength = CP_VARIABLE_PREFERENCES_PREFIX.length();
+       // for (int i = 0; i < propertyNames.length; i++){
+       // String propertyName = propertyNames[i];
+       // if (propertyName.startsWith(CP_VARIABLE_PREFERENCES_PREFIX)){
+       // String varName = propertyName.substring(variablePrefixLength);
+       // IPath varPath = new Path(preferences.getString(propertyName).trim());
+       //
+       // Variables.put(varName, varPath);
+       // PreviousSessionVariables.put(varName, varPath);
+       // }
+       // if (propertyName.startsWith(CP_CONTAINER_PREFERENCES_PREFIX)){
+       // recreatePersistedContainer(propertyName,
+       // preferences.getString(propertyName), true/*add to container values*/);
+       // }
+       // }
+       // // override persisted values for variables which have a registered
+       // initializer
+       // String[] registeredVariables = getRegisteredVariableNames();
+       // for (int i = 0; i < registeredVariables.length; i++) {
+       // String varName = registeredVariables[i];
+       // Variables.put(varName, null); // reset variable, but leave its entry in
+       // the Map, so it will be part of variable names.
+       // }
+       // // override persisted values for containers which have a registered
+       // initializer
+       // String[] registeredContainerIDs = getRegisteredContainerIDs();
+       // for (int i = 0; i < registeredContainerIDs.length; i++) {
+       // String containerID = registeredContainerIDs[i];
+       // Iterator projectIterator = Containers.keySet().iterator();
+       // while (projectIterator.hasNext()){
+       // IJavaProject project = (IJavaProject)projectIterator.next();
+       // Map projectContainers = (Map)Containers.get(project);
+       // if (projectContainers != null){
+       // Iterator containerIterator = projectContainers.keySet().iterator();
+       // while (containerIterator.hasNext()){
+       // IPath containerPath = (IPath)containerIterator.next();
+       // if (containerPath.segment(0).equals(containerID)) { // registered
+       // container
+       // projectContainers.put(containerPath, null); // reset container value, but
+       // leave entry in Map
+       // }
+       // }
+       // }
+       // }
+       // }
+       // }
+
+       /**
+        * Merged all awaiting deltas.
+        */
+       public IJavaElementDelta mergeDeltas(Collection deltas) {
+               if (deltas.size() == 0)
+                       return null;
+               if (deltas.size() == 1)
+                       return (IJavaElementDelta) deltas.iterator().next();
+
+               if (DeltaProcessor.VERBOSE) {
+                       System.out
+                                       .println("MERGING " + deltas.size() + " DELTAS [" + Thread.currentThread() + "]"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+               }
+
+               Iterator iterator = deltas.iterator();
+               IJavaElement javaModel = this.getJavaModel();
+               JavaElementDelta rootDelta = new JavaElementDelta(javaModel);
+               boolean insertedTree = false;
+               while (iterator.hasNext()) {
+                       JavaElementDelta delta = (JavaElementDelta) iterator.next();
+                       if (DeltaProcessor.VERBOSE) {
+                               System.out.println(delta.toString());
+                       }
+                       IJavaElement element = delta.getElement();
+                       if (javaModel.equals(element)) {
+                               IJavaElementDelta[] children = delta.getAffectedChildren();
+                               for (int j = 0; j < children.length; j++) {
+                                       JavaElementDelta projectDelta = (JavaElementDelta) children[j];
+                                       rootDelta.insertDeltaTree(projectDelta.getElement(),
+                                                       projectDelta);
+                                       insertedTree = true;
+                               }
+                               IResourceDelta[] resourceDeltas = delta.getResourceDeltas();
+                               if (resourceDeltas != null) {
+                                       for (int i = 0, length = resourceDeltas.length; i < length; i++) {
+                                               rootDelta.addResourceDelta(resourceDeltas[i]);
+                                               insertedTree = true;
+                                       }
+                               }
+                       } else {
+                               rootDelta.insertDeltaTree(element, delta);
+                               insertedTree = true;
+                       }
+               }
+               if (insertedTree) {
+                       return rootDelta;
+               } else {
+                       return null;
+               }
+       }
+
+       /**
+        * Returns the info for this element without disturbing the cache ordering.
+        */
+       // TODO: should be synchronized, could answer unitialized info or if cache
+       // is in middle of rehash, could even answer distinct element info
+       protected Object peekAtInfo(IJavaElement element) {
+               return this.cache.peekAtInfo(element);
+       }
+
+       /**
+        * @see ISaveParticipant
+        */
+       public void prepareToSave(ISaveContext context) throws CoreException {
+       }
+
+       protected void putInfo(IJavaElement element, Object info) {
+               this.cache.putInfo(element, info);
+       }
+
+       /*
+        * Puts the infos in the given map (keys are IJavaElements and values are
+        * JavaElementInfos) in the Java model cache in an atomic way. First checks
+        * that the info for the opened element (or one of its ancestors) has not
+        * been added to the cache. If it is the case, another thread has opened the
+        * element (or one of its ancestors). So returns without updating the cache.
+        */
+       protected synchronized void putInfos(IJavaElement openedElement,
+                       Map newElements) {
+               // remove children
+               Object existingInfo = this.cache.peekAtInfo(openedElement);
+               if (openedElement instanceof IParent
+                               && existingInfo instanceof JavaElementInfo) {
+                       IJavaElement[] children = ((JavaElementInfo) existingInfo)
+                                       .getChildren();
+                       for (int i = 0, size = children.length; i < size; ++i) {
+                               JavaElement child = (JavaElement) children[i];
+                               try {
+                                       child.close();
+                               } catch (JavaModelException e) {
+                                       // ignore
+                               }
+                       }
+               }
+
+               Iterator iterator = newElements.keySet().iterator();
+               while (iterator.hasNext()) {
+                       IJavaElement element = (IJavaElement) iterator.next();
+                       Object info = newElements.get(element);
+                       this.cache.putInfo(element, info);
+               }
+       }
+
+       /**
+        * Reads the build state for the relevant project.
+        */
+       protected Object readState(IProject project) throws CoreException {
+               File file = getSerializationFile(project);
+               if (file != null && file.exists()) {
+                       try {
+                               DataInputStream in = new DataInputStream(
+                                               new BufferedInputStream(new FileInputStream(file)));
+                               try {
+                                       String pluginID = in.readUTF();
+                                       if (!pluginID.equals(JavaCore.PLUGIN_ID))
+                                               throw new IOException(Util
+                                                               .bind("build.wrongFileFormat")); //$NON-NLS-1$
+                                       String kind = in.readUTF();
+                                       if (!kind.equals("STATE")) //$NON-NLS-1$
+                                               throw new IOException(Util
+                                                               .bind("build.wrongFileFormat")); //$NON-NLS-1$
+                                       if (in.readBoolean())
+                                               return PHPBuilder.readState(project, in);
+                                       if (PHPBuilder.DEBUG)
+                                               System.out
+                                                               .println("Saved state thinks last build failed for " + project.getName()); //$NON-NLS-1$
+                               } finally {
+                                       in.close();
+                               }
+                       } catch (Exception e) {
+                               e.printStackTrace();
+                               throw new CoreException(
+                                               new Status(
+                                                               IStatus.ERROR,
+                                                               JavaCore.PLUGIN_ID,
+                                                               Platform.PLUGIN_ERROR,
+                                                               "Error reading last build state for project " + project.getName(), e)); //$NON-NLS-1$
+                       }
+               }
+               return null;
+       }
+
+       // public static void recreatePersistedContainer(String propertyName, String
+       // containerString, boolean addToContainerValues) {
+       // int containerPrefixLength = CP_CONTAINER_PREFERENCES_PREFIX.length();
+       // int index = propertyName.indexOf('|', containerPrefixLength);
+       // if (containerString != null) containerString = containerString.trim();
+       // if (index > 0) {
+       // final String projectName = propertyName.substring(containerPrefixLength,
+       // index).trim();
+       // JavaProject project =
+       // (JavaProject)getJavaModelManager().getJavaModel().getJavaProject(projectName);
+       // final IPath containerPath = new
+       // Path(propertyName.substring(index+1).trim());
+       //
+       // if (containerString == null || containerString.equals(CP_ENTRY_IGNORE)) {
+       // containerPut(project, containerPath, null);
+       // } else {
+       // final IClasspathEntry[] containerEntries =
+       // project.decodeClasspath(containerString, false, false);
+       // if (containerEntries != null && containerEntries !=
+       // JavaProject.INVALID_CLASSPATH) {
+       // IClasspathContainer container = new IClasspathContainer() {
+       // public IClasspathEntry[] getClasspathEntries() {
+       // return containerEntries;
+       // }
+       // public String getDescription() {
+       // return "Persisted container ["+containerPath+" for project ["+
+       // projectName+"]"; //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
+       // }
+       // public int getKind() {
+       // return 0;
+       // }
+       // public IPath getPath() {
+       // return containerPath;
+       // }
+       // public String toString() {
+       // return getDescription();
+       // }
+       //
+       // };
+       // if (addToContainerValues) {
+       // containerPut(project, containerPath, container);
+       // }
+       // Map projectContainers = (Map)PreviousSessionContainers.get(project);
+       // if (projectContainers == null){
+       // projectContainers = new HashMap(1);
+       // PreviousSessionContainers.put(project, projectContainers);
+       // }
+       // projectContainers.put(containerPath, container);
+       // }
+       // }
+       // }
+       // }
+
+       /**
+        * Registers the given delta with this manager.
+        */
+       protected void registerJavaModelDelta(IJavaElementDelta delta) {
+               this.javaModelDeltas.add(delta);
+       }
+
+       /**
+        * Remembers the given scope in a weak set (so no need to remove it: it will
+        * be removed by the garbage collector)
+        */
+       // public void rememberScope(AbstractSearchScope scope) {
+       // // NB: The value has to be null so as to not create a strong reference on
+       // the scope
+       // this.scopes.put(scope, null);
+       // }
+       /**
+        * removeElementChangedListener method comment.
+        */
+       public void removeElementChangedListener(IElementChangedListener listener) {
+
+               for (int i = 0; i < this.elementChangedListenerCount; i++) {
+
+                       if (this.elementChangedListeners[i].equals(listener)) {
+
+                               // need to clone defensively since we might be in the middle of
+                               // listener notifications (#fire)
+                               int length = this.elementChangedListeners.length;
+                               IElementChangedListener[] newListeners = new IElementChangedListener[length];
+                               System.arraycopy(this.elementChangedListeners, 0, newListeners,
+                                               0, i);
+                               int[] newMasks = new int[length];
+                               System.arraycopy(this.elementChangedListenerMasks, 0, newMasks,
+                                               0, i);
+
+                               // copy trailing listeners
+                               int trailingLength = this.elementChangedListenerCount - i - 1;
+                               if (trailingLength > 0) {
+                                       System.arraycopy(this.elementChangedListeners, i + 1,
+                                                       newListeners, i, trailingLength);
+                                       System.arraycopy(this.elementChangedListenerMasks, i + 1,
+                                                       newMasks, i, trailingLength);
+                               }
+
+                               // update manager listener state (#fire need to iterate over
+                               // original listeners through a local variable to hold onto
+                               // the original ones)
+                               this.elementChangedListeners = newListeners;
+                               this.elementChangedListenerMasks = newMasks;
+                               this.elementChangedListenerCount--;
+                               return;
+                       }
+               }
+       }
+
+       /**
+        * Remembers the given scope in a weak set (so no need to remove it: it will
+        * be removed by the garbage collector)
+        */
+       // public void rememberScope(AbstractSearchScope scope) {
+       // // NB: The value has to be null so as to not create a strong reference on
+       // the scope
+       // this.searchScopes.put(scope, null);
+       // }
+       /*
+        * Removes all cached info for the given element (including all children)
+        * from the cache. Returns the info for the given element, or null if it was
+        * closed.
+        */
+       public synchronized Object removeInfoAndChildren(JavaElement element)
+                       throws JavaModelException {
+               Object info = this.cache.peekAtInfo(element);
+               if (info != null) {
+                       boolean wasVerbose = false;
+                       try {
+                               if (VERBOSE) {
+                                       System.out
+                                                       .println("CLOSING Element (" + Thread.currentThread() + "): " + element.toStringWithAncestors()); //$NON-NLS-1$//$NON-NLS-2$
+                                       wasVerbose = true;
+                                       VERBOSE = false;
+                               }
+                               element.closing(info);
+                               if (element instanceof IParent
+                                               && info instanceof JavaElementInfo) {
+                                       IJavaElement[] children = ((JavaElementInfo) info)
+                                                       .getChildren();
+                                       for (int i = 0, size = children.length; i < size; ++i) {
+                                               JavaElement child = (JavaElement) children[i];
+                                               child.close();
+                                       }
+                               }
+                               this.cache.removeInfo(element);
+                               if (wasVerbose) {
+                                       System.out
+                                                       .println("-> Package cache size = " + this.cache.pkgSize()); //$NON-NLS-1$
+                                       System.out
+                                                       .println("-> Openable cache filling ratio = " + NumberFormat.getInstance().format(this.cache.openableFillingRatio()) + "%"); //$NON-NLS-1$//$NON-NLS-2$
+                               }
+                       } finally {
+                               JavaModelManager.VERBOSE = wasVerbose;
+                       }
+                       return info;
+               }
+               return null;
+       }
+
+       public void removePerProjectInfo(JavaProject javaProject) {
+               synchronized (perProjectInfo) { // use the perProjectInfo collection as
+                                                                               // its own lock
+                       IProject project = javaProject.getProject();
+                       PerProjectInfo info = (PerProjectInfo) perProjectInfo.get(project);
+                       if (info != null) {
+                               perProjectInfo.remove(project);
+                       }
+               }
+       }
+
+       /*
+        * Resets the temporary cache for newly created elements to null.
+        */
+       public void resetTemporaryCache() {
+               this.temporaryCache.set(null);
+       }
+
+       /**
+        * @see ISaveParticipant
+        */
+       public void rollback(ISaveContext context) {
+       }
+
+       private void saveState(PerProjectInfo info, ISaveContext context)
+                       throws CoreException {
+
+               // passed this point, save actions are non trivial
+               if (context.getKind() == ISaveContext.SNAPSHOT)
+                       return;
+
+               // save built state
+               if (info.triedRead)
+                       saveBuiltState(info);
+       }
+
+       /**
+        * Saves the built state for the project.
+        */
+       private void saveBuiltState(PerProjectInfo info) throws CoreException {
+               if (PHPBuilder.DEBUG)
+                       System.out.println(Util.bind(
+                                       "build.saveStateProgress", info.project.getName())); //$NON-NLS-1$
+               File file = getSerializationFile(info.project);
+               if (file == null)
+                       return;
+               long t = System.currentTimeMillis();
+               try {
+                       DataOutputStream out = new DataOutputStream(
+                                       new BufferedOutputStream(new FileOutputStream(file)));
+                       try {
+                               out.writeUTF(JavaCore.PLUGIN_ID);
+                               out.writeUTF("STATE"); //$NON-NLS-1$
+                               if (info.savedState == null) {
+                                       out.writeBoolean(false);
+                               } else {
+                                       out.writeBoolean(true);
+                                       PHPBuilder.writeState(info.savedState, out);
+                               }
+                       } finally {
+                               out.close();
+                       }
+               } catch (RuntimeException e) {
+                       try {
+                               file.delete();
+                       } catch (SecurityException se) {
+                       }
+                       throw new CoreException(
+                                       new Status(
+                                                       IStatus.ERROR,
+                                                       JavaCore.PLUGIN_ID,
+                                                       Platform.PLUGIN_ERROR,
+                                                       Util
+                                                                       .bind(
+                                                                                       "build.cannotSaveState", info.project.getName()), e)); //$NON-NLS-1$
+               } catch (IOException e) {
+                       try {
+                               file.delete();
+                       } catch (SecurityException se) {
+                       }
+                       throw new CoreException(
+                                       new Status(
+                                                       IStatus.ERROR,
+                                                       JavaCore.PLUGIN_ID,
+                                                       Platform.PLUGIN_ERROR,
+                                                       Util
+                                                                       .bind(
+                                                                                       "build.cannotSaveState", info.project.getName()), e)); //$NON-NLS-1$
+               }
+               if (PHPBuilder.DEBUG) {
+                       t = System.currentTimeMillis() - t;
+                       System.out.println(Util.bind(
+                                       "build.saveStateComplete", String.valueOf(t))); //$NON-NLS-1$
+               }
+       }
+
+       private synchronized Map containerClone(IJavaProject project) {
+               Map originalProjectContainers = (Map) this.containers.get(project);
+               if (originalProjectContainers == null)
+                       return null;
+               Map projectContainers = new HashMap(originalProjectContainers.size());
+               projectContainers.putAll(originalProjectContainers);
+               return projectContainers;
+       }
+
+       /**
+        * @see ISaveParticipant
+        */
+       public void saving(ISaveContext context) throws CoreException {
+
+               // save container values on snapshot/full save
+               Preferences preferences = JavaCore.getPlugin().getPluginPreferences();
+               IJavaProject[] projects = getJavaModel().getJavaProjects();
+               for (int i = 0, length = projects.length; i < length; i++) {
+                       IJavaProject project = projects[i];
+                       // clone while iterating (see
+                       // https://bugs.eclipse.org/bugs/show_bug.cgi?id=59638)
+                       Map projectContainers = containerClone(project);
+                       if (projectContainers == null)
+                               continue;
+                       for (Iterator keys = projectContainers.keySet().iterator(); keys
+                                       .hasNext();) {
+                               IPath containerPath = (IPath) keys.next();
+                               // IClasspathContainer container = (IClasspathContainer)
+                               // projectContainers.get(containerPath);
+                               String containerKey = CP_CONTAINER_PREFERENCES_PREFIX
+                                               + project.getElementName() + "|" + containerPath;//$NON-NLS-1$
+                               String containerString = CP_ENTRY_IGNORE;
+                               // try {
+                               // if (container != null) {
+                               // containerString =
+                               // ((JavaProject)project).encodeClasspath(container.getClasspathEntries(),
+                               // null, false);
+                               // }
+                               // } catch(JavaModelException e){
+                               // // could not encode entry: leave it as CP_ENTRY_IGNORE
+                               // }
+                               preferences.setDefault(containerKey, CP_ENTRY_IGNORE); // use
+                                                                                                                                               // this
+                                                                                                                                               // default
+                                                                                                                                               // to
+                                                                                                                                               // get
+                                                                                                                                               // rid
+                                                                                                                                               // of
+                                                                                                                                               // removed
+                                                                                                                                               // ones
+                               preferences.setValue(containerKey, containerString);
+                       }
+               }
+               JavaCore.getPlugin().savePluginPreferences();
+
+               // if (context.getKind() == ISaveContext.FULL_SAVE) {
+               // // will need delta since this save (see
+               // https://bugs.eclipse.org/bugs/show_bug.cgi?id=38658)
+               // context.needDelta();
+               //
+               // // clean up indexes on workspace full save
+               // // (see https://bugs.eclipse.org/bugs/show_bug.cgi?id=52347)
+               // IndexManager manager = this.indexManager;
+               // if (manager != null) {
+               // manager.cleanUpIndexes();
+               // }
+               // }
+
+               IProject savedProject = context.getProject();
+               if (savedProject != null) {
+                       if (!JavaProject.hasJavaNature(savedProject))
+                               return; // ignore
+                       PerProjectInfo info = getPerProjectInfo(savedProject, true /*
+                                                                                                                                                * create
+                                                                                                                                                * info
+                                                                                                                                                */);
+                       saveState(info, context);
+                       return;
+               }
+
+               ArrayList vStats = null; // lazy initialized
+               for (Iterator iter = perProjectInfo.values().iterator(); iter.hasNext();) {
+                       try {
+                               PerProjectInfo info = (PerProjectInfo) iter.next();
+                               saveState(info, context);
+                       } catch (CoreException e) {
+                               if (vStats == null)
+                                       vStats = new ArrayList();
+                               vStats.add(e.getStatus());
+                       }
+               }
+               if (vStats != null) {
+                       IStatus[] stats = new IStatus[vStats.size()];
+                       vStats.toArray(stats);
+                       throw new CoreException(new MultiStatus(JavaCore.PLUGIN_ID,
+                                       IStatus.ERROR, stats,
+                                       Util.bind("build.cannotSaveStates"), null)); //$NON-NLS-1$
+               }
+       }
+
+       /**
+        * @see ISaveParticipant
+        */
+       // public void saving(ISaveContext context) throws CoreException {
+       //
+       // IProject savedProject = context.getProject();
+       // if (savedProject != null) {
+       // if (!JavaProject.hasJavaNature(savedProject)) return; // ignore
+       // PerProjectInfo info = getPerProjectInfo(savedProject, true /* create info
+       // */);
+       // saveState(info, context);
+       // return;
+       // }
+       //
+       // ArrayList vStats= null; // lazy initialized
+       // for (Iterator iter = perProjectInfo.values().iterator(); iter.hasNext();)
+       // {
+       // try {
+       // PerProjectInfo info = (PerProjectInfo) iter.next();
+       // saveState(info, context);
+       // } catch (CoreException e) {
+       // if (vStats == null)
+       // vStats= new ArrayList();
+       // vStats.add(e.getStatus());
+       // }
+       // }
+       // if (vStats != null) {
+       // IStatus[] stats= new IStatus[vStats.size()];
+       // vStats.toArray(stats);
+       // throw new CoreException(new MultiStatus(JavaCore.PLUGIN_ID,
+       // IStatus.ERROR, stats, Util.bind("build.cannotSaveStates"), null));
+       // //$NON-NLS-1$
+       // }
+       // }
+       /**
+        * Record the order in which to build the java projects (batch build). This
+        * order is based on the projects classpath settings.
+        */
+       protected void setBuildOrder(String[] javaBuildOrder)
+                       throws JavaModelException {
+
+               // optional behaviour
+               // possible value of index 0 is Compute
+               if (!JavaCore.COMPUTE.equals(JavaCore
+                               .getOption(JavaCore.CORE_JAVA_BUILD_ORDER)))
+                       return; // cannot be customized at project level
+
+               if (javaBuildOrder == null || javaBuildOrder.length <= 1)
+                       return;
+
+               IWorkspace workspace = ResourcesPlugin.getWorkspace();
+               IWorkspaceDescription description = workspace.getDescription();
+               String[] wksBuildOrder = description.getBuildOrder();
+
+               String[] newOrder;
+               if (wksBuildOrder == null) {
+                       newOrder = javaBuildOrder;
+               } else {
+                       // remove projects which are already mentionned in java builder
+                       // order
+                       int javaCount = javaBuildOrder.length;
+                       HashMap newSet = new HashMap(javaCount); // create a set for fast
+                                                                                                               // check
+                       for (int i = 0; i < javaCount; i++) {
+                               newSet.put(javaBuildOrder[i], javaBuildOrder[i]);
+                       }
+                       int removed = 0;
+                       int oldCount = wksBuildOrder.length;
+                       for (int i = 0; i < oldCount; i++) {
+                               if (newSet.containsKey(wksBuildOrder[i])) {
+                                       wksBuildOrder[i] = null;
+                                       removed++;
+                               }
+                       }
+                       // add Java ones first
+                       newOrder = new String[oldCount - removed + javaCount];
+                       System.arraycopy(javaBuildOrder, 0, newOrder, 0, javaCount); // java
+                                                                                                                                                       // projects
+                                                                                                                                                       // are
+                                                                                                                                                       // built
+                                                                                                                                                       // first
+
+                       // copy previous items in their respective order
+                       int index = javaCount;
+                       for (int i = 0; i < oldCount; i++) {
+                               if (wksBuildOrder[i] != null) {
+                                       newOrder[index++] = wksBuildOrder[i];
+                               }
+                       }
+               }
+               // commit the new build order out
+               description.setBuildOrder(newOrder);
+               try {
+                       workspace.setDescription(description);
+               } catch (CoreException e) {
+                       throw new JavaModelException(e);
+               }
+       }
+
+       /**
+        * Sets the last built state for the given project, or null to reset it.
+        */
+       public void setLastBuiltState(IProject project, Object state) {
+               if (!JavaProject.hasJavaNature(project))
+                       return; // should never be requested on non-Java projects
+               PerProjectInfo info = getPerProjectInfo(project, true /*
+                                                                                                                                * create if
+                                                                                                                                * missing
+                                                                                                                                */);
+               info.triedRead = true; // no point trying to re-read once using setter
+               info.savedState = state;
+               if (state == null) { // delete state file to ensure a full build
+                                                               // happens if the workspace crashes
+                       try {
+                               File file = getSerializationFile(project);
+                               if (file != null && file.exists())
+                                       file.delete();
+                       } catch (SecurityException se) {
+                       }
+               }
+       }
+
+       public void shutdown() {
+               // TODO temp-del
+               // if (this.deltaProcessor.indexManager != null){ // no more indexing
+               // this.deltaProcessor.indexManager.shutdown();
+               // }
+               try {
+                       IJavaModel model = this.getJavaModel();
+                       if (model != null) {
+
+                               model.close();
+                       }
+               } catch (JavaModelException e) {
+               }
+       }
+
+       /**
+        * Turns the firing mode to on. That is, deltas that are/have been
+        * registered will be fired.
+        */
+       public void startDeltas() {
+               this.isFiring = true;
+       }
+
+       /**
+        * Turns the firing mode to off. That is, deltas that are/have been
+        * registered will not be fired until deltas are started again.
+        */
+       public void stopDeltas() {
+               this.isFiring = false;
+       }
+
+       /**
+        * Update Java Model given some delta
+        */
+       public void updateJavaModel(IJavaElementDelta customDelta) {
+
+               if (customDelta == null) {
+                       for (int i = 0, length = this.javaModelDeltas.size(); i < length; i++) {
+                               IJavaElementDelta delta = (IJavaElementDelta) this.javaModelDeltas
+                                               .get(i);
+                               this.modelUpdater.processJavaDelta(delta);
+                       }
+               } else {
+                       this.modelUpdater.processJavaDelta(customDelta);
+               }
+       }
+
+       public static IPath variableGet(String variableName) {
+               return (IPath) Variables.get(variableName);
+       }
+
+       public static String[] variableNames() {
+               int length = Variables.size();
+               String[] result = new String[length];
+               Iterator vars = Variables.keySet().iterator();
+               int index = 0;
+               while (vars.hasNext()) {
+                       result[index++] = (String) vars.next();
+               }
+               return result;
+       }
+
+       public static void variablePut(String variableName, IPath variablePath) {
+
+               // update cache - do not only rely on listener refresh
+               if (variablePath == null) {
+                       Variables.remove(variableName);
+                       PreviousSessionVariables.remove(variableName);
+               } else {
+                       Variables.put(variableName, variablePath);
+               }
+
+               // do not write out intermediate initialization value
+               if (variablePath == JavaModelManager.VariableInitializationInProgress) {
+                       return;
+               }
+               Preferences preferences = JavaCore.getPlugin().getPluginPreferences();
+               String variableKey = CP_VARIABLE_PREFERENCES_PREFIX + variableName;
+               String variableString = variablePath == null ? CP_ENTRY_IGNORE
+                               : variablePath.toString();
+               preferences.setDefault(variableKey, CP_ENTRY_IGNORE); // use this
+                                                                                                                               // default to
+                                                                                                                               // get rid of
+                                                                                                                               // removed ones
+               preferences.setValue(variableKey, variableString);
+               JavaCore.getPlugin().savePluginPreferences();
+       }
+
+       /*
+        * Returns all the working copies which have the given owner. Adds the
+        * working copies of the primary owner if specified. Returns null if it has
+        * none.
+        */
+       public ICompilationUnit[] getWorkingCopies(WorkingCopyOwner owner,
+                       boolean addPrimary) {
+               synchronized (perWorkingCopyInfos) {
+                       ICompilationUnit[] primaryWCs = addPrimary
+                                       && owner != DefaultWorkingCopyOwner.PRIMARY ? getWorkingCopies(
+                                       DefaultWorkingCopyOwner.PRIMARY, false)
+                                       : null;
+                       Map workingCopyToInfos = (Map) perWorkingCopyInfos.get(owner);
+                       if (workingCopyToInfos == null)
+                               return primaryWCs;
+                       int primaryLength = primaryWCs == null ? 0 : primaryWCs.length;
+                       int size = workingCopyToInfos.size(); // note size is > 0
+                                                                                                       // otherwise
+                                                                                                       // pathToPerWorkingCopyInfos
+                                                                                                       // would be null
+                       ICompilationUnit[] result = new ICompilationUnit[primaryLength
+                                       + size];
+                       if (primaryWCs != null) {
+                               System.arraycopy(primaryWCs, 0, result, 0, primaryLength);
+                       }
+                       Iterator iterator = workingCopyToInfos.values().iterator();
+                       int index = primaryLength;
+                       while (iterator.hasNext()) {
+                               result[index++] = ((JavaModelManager.PerWorkingCopyInfo) iterator
+                                               .next()).getWorkingCopy();
+                       }
+                       return result;
+               }
+       }
+
+       /*
+        * A HashSet that contains the IJavaProject whose classpath is being
+        * resolved.
+        */
+       private ThreadLocal classpathsBeingResolved = new ThreadLocal();
+
+       private HashSet getClasspathBeingResolved() {
+               HashSet result = (HashSet) this.classpathsBeingResolved.get();
+               if (result == null) {
+                       result = new HashSet();
+                       this.classpathsBeingResolved.set(result);
+               }
+               return result;
+       }
+
+       public boolean isClasspathBeingResolved(IJavaProject project) {
+               return getClasspathBeingResolved().contains(project);
+       }
+
+       public void setClasspathBeingResolved(IJavaProject project,
+                       boolean classpathIsResolved) {
+               if (classpathIsResolved) {
+                       getClasspathBeingResolved().add(project);
+               } else {
+                       getClasspathBeingResolved().remove(project);
+               }
+       }
+}