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