Case Study: adding data and statistics

[ifi-stolz-refaktor.git] / case-study / jdt-after / ui / org / eclipse / jdt / internal / ui / filters / OutputFolderFilter.java

diff --git a/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/filters/OutputFolderFilter.java b/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/filters/OutputFolderFilter.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2011 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.internal.ui.filters;
+
+
+import org.eclipse.core.runtime.CoreException;
+import org.eclipse.core.runtime.IPath;
+
+import org.eclipse.core.resources.IFolder;
+import org.eclipse.core.resources.IProject;
+
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.jface.viewers.ViewerFilter;
+
+import org.eclipse.jdt.core.IClasspathEntry;
+import org.eclipse.jdt.core.IJavaProject;
+import org.eclipse.jdt.core.JavaCore;
+
+
+/**
+ * Filters out all output folders.
+ * <p>
+ * Note: Folder which are direct children of a Java element
+ * are already filtered by the Java Model.
+ * </p>
+ *
+ * @since 3.0
+ */
+public class OutputFolderFilter extends ViewerFilter {
+
+       /**
+        * Returns the result of this filter, when applied to the
+        * given element.
+        *
+        * @param viewer the viewer
+        * @param parent the parent
+        * @param element the element to test
+        * @return <code>true</code> if element should be included
+        * @since 3.0
+        */
+       @Override
+       public boolean select(Viewer viewer, Object parent, Object element) {
+               if (element instanceof IFolder) {
+                       IFolder folder= (IFolder)element;
+                       IProject proj= folder.getProject();
+                       try {
+                               if (!proj.hasNature(JavaCore.NATURE_ID))
+                                       return true;
+
+                               IJavaProject jProject= JavaCore.create(folder.getProject());
+                               if (jProject == null || !jProject.exists())
+                                       return true;
+
+                               // Check default output location
+                               IPath defaultOutputLocation= jProject.getOutputLocation();
+                               IPath folderPath= folder.getFullPath();
+                               if (defaultOutputLocation != null && defaultOutputLocation.equals(folderPath))
+                                       return false;
+
+                               // Check output location for each class path entry
+                               IClasspathEntry[] cpEntries= jProject.getRawClasspath();
+                               for (int i= 0, length= cpEntries.length; i < length; i++) {
+                                       IPath outputLocation= cpEntries[i].getOutputLocation();
+                                       if (outputLocation != null && outputLocation.equals(folderPath))
+                                               return false;
+                               }
+                       } catch (CoreException ex) {
+                               return true;
+                       }
+               }
+               return true;
+       }
+}