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
  27  * (eg GIF files).
  28  */
  29 public class DeleteResourceElementsOperation extends MultiOperation {
  30 /**
  31  * When executed, this operation will delete the given elements. The elements
  32  * to delete cannot be <code>null</code> or empty, and must have a corresponding
  33  * resource.
  34  */
  35 protected DeleteResourceElementsOperation(IJavaElement[] elementsToProcess, boolean force) {
  36         super(elementsToProcess, force);
  37 }
  38 /**
  39  * Deletes the direct children of <code>frag</code> corresponding to its kind
  40  * (K_SOURCE or K_BINARY), and deletes the corresponding folder if it is then
  41  * empty.
  42  */
  43 private void deletePackageFragment(IPackageFragment frag)
  44         throws JavaModelException {
  45         IResource res = frag.getResource();
  46         if (res != null && res.getType() == IResource.FOLDER) {
  47                 // collect the children to remove
  48                 IJavaElement[] childrenOfInterest = frag.getChildren();
  49                 if (childrenOfInterest.length > 0) {
  50                         IResource[] resources = new IResource[childrenOfInterest.length];
  51                         // remove the children
  52                         for (int i = 0; i < childrenOfInterest.length; i++) {
  53                                 resources[i] = childrenOfInterest[i].getCorrespondingResource();
  54                         }
  55                         deleteResources(resources, force);
  56                 }
  57
  58                 // Discard non-java resources
  59 //              Object[] nonJavaResources = frag.getNonJavaResources();
  60 //              int actualResourceCount = 0;
  61 //              for (int i = 0, max = nonJavaResources.length; i < max; i++){
  62 //                      if (nonJavaResources[i] instanceof IResource) actualResourceCount++;
  63 //              }
  64 //              IResource[] actualNonJavaResources = new IResource[actualResourceCount];
  65 //              for (int i = 0, max = nonJavaResources.length, index = 0; i < max; i++){
  66 //                      if (nonJavaResources[i] instanceof IResource) actualNonJavaResources[index++] = (IResource)nonJavaResources[i];
  67 //              }
  68 //              deleteResources(actualNonJavaResources, fForce);
  69
  70                 // delete remaining files in this package (.class file in the case where Proj=src=bin)
  71                 IResource[] remainingFiles;
  72                 try {
  73                         remainingFiles = ((IFolder) res).members();
  74                 } catch (CoreException ce) {
  75                         throw new JavaModelException(ce);
  76                 }
  77                 boolean isEmpty = true;
  78                 for (int i = 0, length = remainingFiles.length; i < length; i++) {
  79                         IResource file = remainingFiles[i];
  80                         if (file instanceof IFile) {
  81                                 this.deleteResource(file, IResource.FORCE | IResource.KEEP_HISTORY);
  82                         } else {
  83                                 isEmpty = false;
  84                         }
  85                 }
  86                 if (isEmpty) {
  87                         // delete recursively empty folders
  88                         IResource fragResource =  frag.getResource();
  89                         if (fragResource != null) {
  90                                 deleteEmptyPackageFragment(frag, false, fragResource.getParent());
  91                         }
  92                 }
  93         }
  94 }
  95 /**
  96  * @see MultiOperation
  97  */
  98 protected String getMainTaskName() {
  99         return Util.bind("operation.deleteResourceProgress"); //$NON-NLS-1$
 100 }
 101 /**
 102  * @see MultiOperation. This method delegate to <code>deleteResource</code> or
 103  * <code>deletePackageFragment</code> depending on the type of <code>element</code>.
 104  */
 105 protected void processElement(IJavaElement element) throws JavaModelException {
 106         switch (element.getElementType()) {
 107                 case IJavaElement.CLASS_FILE :
 108                 case IJavaElement.COMPILATION_UNIT :
 109                         deleteResource(element.getResource(), force ? IResource.FORCE | IResource.KEEP_HISTORY : IResource.KEEP_HISTORY);
 110                         break;
 111                 case IJavaElement.PACKAGE_FRAGMENT :
 112                         deletePackageFragment((IPackageFragment) element);
 113                         break;
 114                 default :
 115                         throw new JavaModelException(new JavaModelStatus(JavaModelStatus.INVALID_ELEMENT_TYPES, element));
 116         }
 117         // ensure the element is closed
 118         if (element instanceof IOpenable) {
 119                 ((IOpenable)element).close();
 120         }
 121 }
 122 /**
 123  * @see MultiOperation
 124  */
 125 protected void verify(IJavaElement element) throws JavaModelException {
 126         if (element == null || !element.exists())
 127                 error(JavaModelStatus.ELEMENT_DOES_NOT_EXIST, element);
 128
 129         int type = element.getElementType();
 130         if (type <= IJavaElement.PACKAGE_FRAGMENT_ROOT || type > IJavaElement.COMPILATION_UNIT)
 131                 error(JavaModelStatus.INVALID_ELEMENT_TYPES, element);
 132 //      else if (type == IJavaElement.PACKAGE_FRAGMENT && element instanceof JarPackageFragment)
 133 //              error(JavaModelStatus.INVALID_ELEMENT_TYPES, element);
 134         IResource resource = element.getResource();
 135         if (resource instanceof IFolder) {
 136                 if (resource.isLinked()) {
 137                         error(JavaModelStatus.INVALID_RESOURCE, element);
 138                 }
 139         }
 140 }
 141 }