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

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 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;
  12
  13 import java.util.List;
  14
  15 import org.eclipse.core.resources.IProject;
  16 import org.eclipse.core.resources.IResource;
  17
  18 import org.eclipse.jface.resource.ImageDescriptor;
  19 import org.eclipse.jface.viewers.IDecoration;
  20
  21 import org.eclipse.jdt.core.IJavaElement;
  22 import org.eclipse.jdt.core.IJavaElementDelta;
  23 import org.eclipse.jdt.core.IJavaProject;
  24 import org.eclipse.jdt.core.IPackageFragmentRoot;
  25 import org.eclipse.jdt.core.JavaCore;
  26 import org.eclipse.jdt.core.JavaModelException;
  27
  28 public class BuildpathIndicatorLabelDecorator extends AbstractJavaElementLabelDecorator {
  29
  30         /**
  31          * {@inheritDoc}
  32          */
  33         @Override
  34         public void decorate(Object element, IDecoration decoration) {
  35                 ImageDescriptor overlay= getOverlay(element);
  36                 if (overlay != null) {
  37                         decoration.addOverlay(overlay, IDecoration.BOTTOM_LEFT);
  38                 }
  39         }
  40
  41         private ImageDescriptor getOverlay(Object element) {
  42                 if (element instanceof IResource) {
  43                         IResource resource= (IResource) element;
  44                         IProject project= resource.getProject();
  45                         if (project != null) {
  46                                 IJavaProject javaProject= JavaCore.create(project);
  47                                 if (javaProject != null) {
  48                                         if (javaProject.isOnClasspath(resource)) {
  49                                                 IJavaElement javaElement= JavaCore.create(resource, javaProject);
  50                                                 try {
  51                                                         if (javaElement instanceof IPackageFragmentRoot
  52                                                                         && ((IPackageFragmentRoot)javaElement).getKind() != IPackageFragmentRoot.K_SOURCE) {
  53                                                                 return JavaPluginImages.DESC_OVR_LIBRARY;
  54                                                         }
  55                                                 } catch (JavaModelException e) {
  56                                                         return null;
  57                                                 }
  58                                         }
  59                                 }
  60                         }
  61                 }
  62                 return null;
  63         }
  64
  65         @Override
  66         protected void processDelta(IJavaElementDelta delta, List<IJavaElement> result) {
  67                 IJavaElement elem= delta.getElement();
  68
  69                 boolean isChanged= delta.getKind() == IJavaElementDelta.CHANGED;
  70                 boolean isRemoved= delta.getKind() == IJavaElementDelta.REMOVED;
  71                 int flags= delta.getFlags();
  72
  73                 switch (elem.getElementType()) {
  74                         case IJavaElement.JAVA_MODEL:
  75                                 processChildrenDelta(delta, result);
  76                                 return;
  77                         case IJavaElement.JAVA_PROJECT:
  78                                 if (isRemoved || (isChanged &&
  79                                                 (flags & IJavaElementDelta.F_CLOSED) != 0)) {
  80                                         return;
  81                                 }
  82                                 processChildrenDelta(delta, result);
  83                                 return;
  84                         case IJavaElement.PACKAGE_FRAGMENT_ROOT:
  85                                 if (isRemoved) {
  86                                         return;
  87                                 }
  88                                 try {
  89                                         if ((((flags & IJavaElementDelta.F_REMOVED_FROM_CLASSPATH) != 0) ||
  90                                                         ((flags & IJavaElementDelta.F_ADDED_TO_CLASSPATH) != 0))
  91                                                         && ((IPackageFragmentRoot)elem).getKind() != IPackageFragmentRoot.K_SOURCE) {
  92                                                 result.add(elem);
  93                                         }
  94                                 } catch (JavaModelException e) {
  95                                         // don't update
  96                                 }
  97                                 return;
  98                         default:
  99                                 return;
 100                 }
 101         }
 102
 103 }