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Java > Open Source Codes > org > eclipse > help > ui > internal > search > HelpWorkingSetTreeContentProvider


1 /*******************************************************************************
2  * Copyright (c) 2000, 2005 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.help.ui.internal.search;
12
13 import org.eclipse.core.runtime.*;
14 import org.eclipse.help.internal.workingset.*;
15 import org.eclipse.jface.viewers.*;
16
17 public class HelpWorkingSetTreeContentProvider implements ITreeContentProvider {
18
19     /**
20      * Constructor for HelpWorkingSetTreeContentProvider.
21      */
22     public HelpWorkingSetTreeContentProvider() {
23         super();
24     }
25
26     /**
27      * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
28      */
29     public Object JavaDoc[] getChildren(Object JavaDoc parentElement) {
30         if (parentElement instanceof AdaptableTocsArray)
31             return ((AdaptableTocsArray) parentElement).getChildren();
32         else if (parentElement instanceof AdaptableToc)
33             return ((AdaptableToc) parentElement).getChildren();
34         else
35             return new IAdaptable[0];
36     }
37
38     /**
39      * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
40      */
41     public Object JavaDoc getParent(Object JavaDoc element) {
42         if (element instanceof AdaptableHelpResource)
43             return ((AdaptableHelpResource) element).getParent();
44         return null;
45     }
46
47     /**
48      * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
49      */
50     public boolean hasChildren(Object JavaDoc element) {
51         return (element instanceof AdaptableToc || element instanceof AdaptableTocsArray);
52     }
53
54     /**
55      * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
56      */
57     public Object JavaDoc[] getElements(Object JavaDoc inputElement) {
58         return getChildren(inputElement);
59     }
60
61     /**
62      * @see org.eclipse.jface.viewers.IContentProvider#dispose()
63      */
64     public void dispose() {
65     }
66
67     /**
68      * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer,
69      * java.lang.Object, java.lang.Object)
70      */
71     public void inputChanged(Viewer viewer, Object JavaDoc oldInput, Object JavaDoc newInput) {
72     }
73
74 }
75
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