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Java > Open Source Codes > org > eclipse > jdt > internal > ui > filters > OutputFolderFilter


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 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.resources.IFolder;
15 import org.eclipse.core.resources.IProject;
16 import org.eclipse.core.runtime.CoreException;
17 import org.eclipse.core.runtime.IPath;
18
19 import org.eclipse.jface.viewers.Viewer;
20 import org.eclipse.jface.viewers.ViewerFilter;
21
22 import org.eclipse.jdt.core.IClasspathEntry;
23 import org.eclipse.jdt.core.IJavaProject;
24 import org.eclipse.jdt.core.JavaCore;
25
26
27 /**
28  * Filters out all output folders.
29  * <p>
30  * Note: Folder which are direct children of a Java element
31  * are already filtered by the Java Model.
32  * </p>
33  *
34  * @since 3.0
35  */
36 public class OutputFolderFilter extends ViewerFilter {
37     
38     /**
39      * Returns the result of this filter, when applied to the
40      * given element.
41      *
42      * @param element the element to test
43      * @return <code>true</code> if element should be included
44      * @since 3.0
45      */
46     public boolean select(Viewer viewer, Object JavaDoc parent, Object JavaDoc element) {
47         if (element instanceof IFolder) {
48             IFolder folder= (IFolder)element;
49             IProject proj= folder.getProject();
50             try {
51                 if (!proj.hasNature(JavaCore.NATURE_ID))
52                     return true;
53                 
54                 IJavaProject jProject= JavaCore.create(folder.getProject());
55                 if (jProject == null || !jProject.exists())
56                     return true;
57                 
58                 // Check default output location
59 IPath defaultOutputLocation= jProject.getOutputLocation();
60                 IPath folderPath= folder.getFullPath();
61                 if (defaultOutputLocation != null && defaultOutputLocation.equals(folderPath))
62                     return false;
63                 
64                 // Check output location for each class path entry
65 IClasspathEntry[] cpEntries= jProject.getRawClasspath();
66                 for (int i= 0, length= cpEntries.length; i < length; i++) {
67                     IPath outputLocation= cpEntries[i].getOutputLocation();
68                     if (outputLocation != null && outputLocation.equals(folderPath))
69                         return false;
70                 }
71             } catch (CoreException ex) {
72                 return true;
73             }
74         }
75         return true;
76     }
77 }
78
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