CallersTreeContentProvider


1   /*******************************************************************************
2    * Copyright (c) 2000, 2006 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.view;
12  
13  import java.util.Set  ;
14  
15  import org.eclipse.jface.viewers.ITreeContentProvider;
16  import org.eclipse.pde.core.plugin.IPlugin;
17  import org.eclipse.pde.core.plugin.IPluginBase;
18  import org.eclipse.pde.core.plugin.IPluginImport;
19  import org.eclipse.pde.core.plugin.IPluginModelBase;
20  
21  public class CallersTreeContentProvider extends CallersContentProvider
22          implements ITreeContentProvider {
23  
24      /**
25       * Constructor.
26       */
27      public CallersTreeContentProvider(DependenciesView view) {
28          super(view);
29      }
30  
31      /**
32       * @see ITreeContentProvider#getChildren(Object) return Object[] of
33       *      IPluginBase
34       */
35      public Object  [] getChildren(Object   parentElement) {
36          String   id = null;
37          if (parentElement instanceof IPluginModelBase) {
38              IPluginBase pluginBase = ((IPluginModelBase) parentElement)
39                      .getPluginBase(false);
40              if (pluginBase != null)
41                  id = pluginBase.getId();
42          } else if (parentElement instanceof IPlugin) {
43              id = ((IPlugin) parentElement).getId();
44          } else if (parentElement instanceof IPluginImport) {
45              id = ((IPluginImport) parentElement).getId();
46          }
47          if (id == null) {
48              return new Object  [0];
49          }
50          Set   l = findReferences(id);
51          return l.toArray();
52      }
53  
54      /**
55       * @see IStructuredContentProvider#getElements(Object)
56       * @return Object[] with 0 or 1 IPluginBase
57       */
58      public Object  [] getElements(Object   inputElement) {
59          if (inputElement instanceof IPluginModelBase) {
60              return new Object  [] { ((IPluginModelBase) inputElement)
61                      .getPluginBase() };
62          }
63          return new Object  [0];
64      }
65  
66      /**
67       * @see ITreeContentProvider#getParent(Object)
68       */
69      public Object   getParent(Object   element) {
70          return null;
71      }
72  
73      /**
74       * @see ITreeContentProvider#hasChildren(Object)
75       */
76      public boolean hasChildren(Object   element) {
77          return getChildren(element).length > 0;
78      }
79  
80  }
81
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