case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/filters/OutputFolderFilter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2011 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.ui.filters;
  12
  13
  14 import org.eclipse.core.runtime.CoreException;
  15 import org.eclipse.core.runtime.IPath;
  16
  17 import org.eclipse.core.resources.IFolder;
  18 import org.eclipse.core.resources.IProject;
  19
  20 import org.eclipse.jface.viewers.Viewer;
  21 import org.eclipse.jface.viewers.ViewerFilter;
  22
  23 import org.eclipse.jdt.core.IClasspathEntry;
  24 import org.eclipse.jdt.core.IJavaProject;
  25 import org.eclipse.jdt.core.JavaCore;
  26
  27
  28 /**
  29  * Filters out all output folders.
  30  * <p>
  31  * Note: Folder which are direct children of a Java element
  32  * are already filtered by the Java Model.
  33  * </p>
  34  *
  35  * @since 3.0
  36  */
  37 public class OutputFolderFilter extends ViewerFilter {
  38
  39         /**
  40          * Returns the result of this filter, when applied to the
  41          * given element.
  42          *
  43          * @param viewer the viewer
  44          * @param parent the parent
  45          * @param element the element to test
  46          * @return <code>true</code> if element should be included
  47          * @since 3.0
  48          */
  49         @Override
  50         public boolean select(Viewer viewer, Object parent, Object element) {
  51                 if (element instanceof IFolder) {
  52                         IFolder folder= (IFolder)element;
  53                         IProject proj= folder.getProject();
  54                         try {
  55                                 if (!proj.hasNature(JavaCore.NATURE_ID))
  56                                         return true;
  57
  58                                 IJavaProject jProject= JavaCore.create(folder.getProject());
  59                                 if (jProject == null || !jProject.exists())
  60                                         return true;
  61
  62                                 // Check default output location
  63                                 IPath defaultOutputLocation= jProject.getOutputLocation();
  64                                 IPath folderPath= folder.getFullPath();
  65                                 if (defaultOutputLocation != null && defaultOutputLocation.equals(folderPath))
  66                                         return false;
  67
  68                                 // Check output location for each class path entry
  69                                 IClasspathEntry[] cpEntries= jProject.getRawClasspath();
  70                                 for (int i= 0, length= cpEntries.length; i < length; i++) {
  71                                         IPath outputLocation= cpEntries[i].getOutputLocation();
  72                                         if (outputLocation != null && outputLocation.equals(folderPath))
  73                                                 return false;
  74                                 }
  75                         } catch (CoreException ex) {
  76                                 return true;
  77                         }
  78                 }
  79                 return true;
  80         }
  81 }