CalleesTreeContentProvider


1   /*******************************************************************************
2    * Copyright (c) 2000, 2007 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.pde.internal.ui.views.dependencies;
12  
13  import org.eclipse.jface.viewers.ITreeContentProvider;
14  import org.eclipse.osgi.service.resolver.BundleDescription;
15  import org.eclipse.osgi.service.resolver.BundleSpecification;
16  import org.eclipse.osgi.service.resolver.ExportPackageDescription;
17  import org.eclipse.osgi.service.resolver.ImportPackageSpecification;
18  import org.eclipse.pde.core.plugin.IPluginBase;
19  import org.eclipse.pde.core.plugin.IPluginModelBase;
20  
21  public class CalleesTreeContentProvider extends CalleesContentProvider
22          implements ITreeContentProvider {
23  
24      /**
25       * Constructor.
26       */
27      public CalleesTreeContentProvider(DependenciesView view) {
28          super(view);
29      }
30  
31      public Object  [] getChildren(Object   parentElement) {
32          if (parentElement instanceof IPluginBase) {
33              parentElement = ((IPluginBase)parentElement).getModel();
34          }
35          if (parentElement instanceof IPluginModelBase) {
36              return findCallees(((IPluginModelBase)parentElement));
37          }
38          if (parentElement instanceof BundleSpecification) {
39              parentElement = ((BundleSpecification)parentElement).getSupplier();
40          }
41          if (parentElement instanceof ImportPackageSpecification) {
42              parentElement = ((ExportPackageDescription)(((ImportPackageSpecification)parentElement).getSupplier())).getExporter();
43          }
44          if (parentElement instanceof BundleDescription) {
45              return findCallees((BundleDescription)parentElement);
46          }
47          return new Object  [0];
48      }
49  
50      /**
51       * @see IStructuredContentProvider#getElements(Object)
52       * @return Object[] of IPluginBase
53       */
54      public Object  [] getElements(Object   inputElement) {
55          if (inputElement instanceof IPluginModelBase) {
56              // need to use PluginBase.  If we use BundleDescription, whenever the Manifest is update the tree refreshes and collapses
57              // If we use IPluginModelBase, it confuses the Tree since we return the same object as our input
58              return new Object  [] { ((IPluginModelBase) inputElement).getPluginBase() };
59          }
60          return new Object  [0];
61      }
62  
63      /**
64       * @see ITreeContentProvider#getParent(Object)
65       */
66      public Object   getParent(Object   element) {
67          return null;
68      }
69  
70      /**
71       * @see ITreeContentProvider#hasChildren(Object)
72       */
73      public boolean hasChildren(Object   element) {
74          return getChildren(element).length > 0;
75      }
76  
77  }
78
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