net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/core/DeleteResourceElementsOperation.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.core;
  12
  13 import net.sourceforge.phpdt.core.IJavaElement;
  14 import net.sourceforge.phpdt.core.IOpenable;
  15 import net.sourceforge.phpdt.core.IPackageFragment;
  16 import net.sourceforge.phpdt.core.JavaModelException;
  17 import net.sourceforge.phpdt.internal.core.util.Util;
  18
  19 import org.eclipse.core.resources.IFile;
  20 import org.eclipse.core.resources.IFolder;
  21 import org.eclipse.core.resources.IResource;
  22 import org.eclipse.core.runtime.CoreException;
  23
  24 /**
  25  * This operation deletes a collection of resources and all of their children.
  26  * It does not delete resources which do not belong to the Java Model (eg GIF
  27  * files).
  28  */
  29 public class DeleteResourceElementsOperation extends MultiOperation {
  30         /**
  31          * When executed, this operation will delete the given elements. The
  32          * elements to delete cannot be <code>null</code> or empty, and must have
  33          * a corresponding resource.
  34          */
  35         protected DeleteResourceElementsOperation(IJavaElement[] elementsToProcess,
  36                         boolean force) {
  37                 super(elementsToProcess, force);
  38         }
  39
  40         /**
  41          * Deletes the direct children of <code>frag</code> corresponding to its
  42          * kind (K_SOURCE or K_BINARY), and deletes the corresponding folder if it
  43          * is then empty.
  44          */
  45         private void deletePackageFragment(IPackageFragment frag)
  46                         throws JavaModelException {
  47                 IResource res = frag.getResource();
  48                 if (res != null && res.getType() == IResource.FOLDER) {
  49                         // collect the children to remove
  50                         IJavaElement[] childrenOfInterest = frag.getChildren();
  51                         if (childrenOfInterest.length > 0) {
  52                                 IResource[] resources = new IResource[childrenOfInterest.length];
  53                                 // remove the children
  54                                 for (int i = 0; i < childrenOfInterest.length; i++) {
  55                                         resources[i] = childrenOfInterest[i]
  56                                                         .getCorrespondingResource();
  57                                 }
  58                                 deleteResources(resources, force);
  59                         }
  60
  61                         // Discard non-java resources
  62                         // Object[] nonJavaResources = frag.getNonJavaResources();
  63                         // int actualResourceCount = 0;
  64                         // for (int i = 0, max = nonJavaResources.length; i < max; i++){
  65                         // if (nonJavaResources[i] instanceof IResource)
  66                         // actualResourceCount++;
  67                         // }
  68                         // IResource[] actualNonJavaResources = new
  69                         // IResource[actualResourceCount];
  70                         // for (int i = 0, max = nonJavaResources.length, index = 0; i <
  71                         // max; i++){
  72                         // if (nonJavaResources[i] instanceof IResource)
  73                         // actualNonJavaResources[index++] = (IResource)nonJavaResources[i];
  74                         // }
  75                         // deleteResources(actualNonJavaResources, fForce);
  76
  77                         // delete remaining files in this package (.class file in the case
  78                         // where Proj=src=bin)
  79                         IResource[] remainingFiles;
  80                         try {
  81                                 remainingFiles = ((IFolder) res).members();
  82                         } catch (CoreException ce) {
  83                                 throw new JavaModelException(ce);
  84                         }
  85                         boolean isEmpty = true;
  86                         for (int i = 0, length = remainingFiles.length; i < length; i++) {
  87                                 IResource file = remainingFiles[i];
  88                                 if (file instanceof IFile) {
  89                                         this.deleteResource(file, IResource.FORCE
  90                                                         | IResource.KEEP_HISTORY);
  91                                 } else {
  92                                         isEmpty = false;
  93                                 }
  94                         }
  95                         if (isEmpty) {
  96                                 // delete recursively empty folders
  97                                 IResource fragResource = frag.getResource();
  98                                 if (fragResource != null) {
  99                                         deleteEmptyPackageFragment(frag, false, fragResource
 100                                                         .getParent());
 101                                 }
 102                         }
 103                 }
 104         }
 105
 106         /**
 107          * @see MultiOperation
 108          */
 109         protected String getMainTaskName() {
 110                 return Util.bind("operation.deleteResourceProgress"); //$NON-NLS-1$
 111         }
 112
 113         /**
 114          * @see MultiOperation. This method delegate to <code>deleteResource</code>
 115          *      or <code>deletePackageFragment</code> depending on the type of
 116          *      <code>element</code>.
 117          */
 118         protected void processElement(IJavaElement element)
 119                         throws JavaModelException {
 120                 switch (element.getElementType()) {
 121                 case IJavaElement.CLASS_FILE:
 122                 case IJavaElement.COMPILATION_UNIT:
 123                         deleteResource(element.getResource(), force ? IResource.FORCE
 124                                         | IResource.KEEP_HISTORY : IResource.KEEP_HISTORY);
 125                         break;
 126                 case IJavaElement.PACKAGE_FRAGMENT:
 127                         deletePackageFragment((IPackageFragment) element);
 128                         break;
 129                 default:
 130                         throw new JavaModelException(new JavaModelStatus(
 131                                         JavaModelStatus.INVALID_ELEMENT_TYPES, element));
 132                 }
 133                 // ensure the element is closed
 134                 if (element instanceof IOpenable) {
 135                         ((IOpenable) element).close();
 136                 }
 137         }
 138
 139         /**
 140          * @see MultiOperation
 141          */
 142         protected void verify(IJavaElement element) throws JavaModelException {
 143                 if (element == null || !element.exists())
 144                         error(JavaModelStatus.ELEMENT_DOES_NOT_EXIST, element);
 145
 146                 int type = element.getElementType();
 147                 if (type <= IJavaElement.PACKAGE_FRAGMENT_ROOT
 148                                 || type > IJavaElement.COMPILATION_UNIT)
 149                         error(JavaModelStatus.INVALID_ELEMENT_TYPES, element);
 150                 // else if (type == IJavaElement.PACKAGE_FRAGMENT && element instanceof
 151                 // JarPackageFragment)
 152                 // error(JavaModelStatus.INVALID_ELEMENT_TYPES, element);
 153                 IResource resource = element.getResource();
 154                 if (resource instanceof IFolder) {
 155                         if (resource.isLinked()) {
 156                                 error(JavaModelStatus.INVALID_RESOURCE, element);
 157                         }
 158                 }
 159         }
 160 }