Case Study: adding data and statistics

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

diff --git a/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/BuildpathIndicatorLabelDecorator.java b/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/BuildpathIndicatorLabelDecorator.java
new file mode 100644 (file)
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--- /dev/null
+++ b/case-study/jdt-after/ui/org/eclipse/jdt/internal/ui/BuildpathIndicatorLabelDecorator.java
@@ -0,0 +1,103 @@
+/*******************************************************************************
+ * Copyright (c) 2009, 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;
+
+import java.util.List;
+
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.IResource;
+
+import org.eclipse.jface.resource.ImageDescriptor;
+import org.eclipse.jface.viewers.IDecoration;
+
+import org.eclipse.jdt.core.IJavaElement;
+import org.eclipse.jdt.core.IJavaElementDelta;
+import org.eclipse.jdt.core.IJavaProject;
+import org.eclipse.jdt.core.IPackageFragmentRoot;
+import org.eclipse.jdt.core.JavaCore;
+import org.eclipse.jdt.core.JavaModelException;
+
+public class BuildpathIndicatorLabelDecorator extends AbstractJavaElementLabelDecorator {
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void decorate(Object element, IDecoration decoration) {
+               ImageDescriptor overlay= getOverlay(element);
+               if (overlay != null) {
+                       decoration.addOverlay(overlay, IDecoration.BOTTOM_LEFT);
+               }
+       }
+
+       private ImageDescriptor getOverlay(Object element) {
+               if (element instanceof IResource) {
+                       IResource resource= (IResource) element;
+                       IProject project= resource.getProject();
+                       if (project != null) {
+                               IJavaProject javaProject= JavaCore.create(project);
+                               if (javaProject != null) {
+                                       if (javaProject.isOnClasspath(resource)) {
+                                               IJavaElement javaElement= JavaCore.create(resource, javaProject);
+                                               try {
+                                                       if (javaElement instanceof IPackageFragmentRoot
+                                                                       && ((IPackageFragmentRoot)javaElement).getKind() != IPackageFragmentRoot.K_SOURCE) {
+                                                               return JavaPluginImages.DESC_OVR_LIBRARY;
+                                                       }
+                                               } catch (JavaModelException e) {
+                                                       return null;
+                                               }
+                                       }
+                               }
+                       }
+               }
+               return null;
+       }
+
+       @Override
+       protected void processDelta(IJavaElementDelta delta, List<IJavaElement> result) {
+               IJavaElement elem= delta.getElement();
+
+               boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
+               boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
+               int flags= delta.getFlags();
+
+               switch (elem.getElementType()) {
+                       case IJavaElement.JAVA_MODEL:
+                               processChildrenDelta(delta, result);
+                               return;
+                       case IJavaElement.JAVA_PROJECT:
+                               if (isRemoved || (isChanged &&
+                                               (flags & IJavaElementDelta.F_CLOSED) != 0)) {
+                                       return;
+                               }
+                               processChildrenDelta(delta, result);
+                               return;
+                       case IJavaElement.PACKAGE_FRAGMENT_ROOT:
+                               if (isRemoved) {
+                                       return;
+                               }
+                               try {
+                                       if ((((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) ||
+                                                       ((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0))
+                                                       && ((IPackageFragmentRoot)elem).getKind() != IPackageFragmentRoot.K_SOURCE) {
+                                               result.add(elem);
+                                       }
+                               } catch (JavaModelException e) {
+                                       // don't update
+                               }
+                               return;
+                       default:
+                               return;
+               }
+       }
+
+}