FileEditorMappingContentProvider


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.ui.dialogs;
12  
13  import org.eclipse.jface.viewers.IStructuredContentProvider;
14  import org.eclipse.jface.viewers.Viewer;
15  import org.eclipse.ui.IFileEditorMapping;
16  
17  /**
18   * A content provider for displaying of <code>IFileEditorMapping</code>
19   * objects in viewers.
20   * <p>
21   * This class has a singleton instance, 
22   * <code>FileEditorMappingContentProvider.INSTANCE</code>,
23   * which can be used any place this kind of content provider is needed.
24   * </p>
25   *
26   * @see org.eclipse.jface.viewers.IContentProvider
27   */
28  public class FileEditorMappingContentProvider implements
29          IStructuredContentProvider {
30  
31      /**
32       * Singleton instance accessor.
33       */
34      public final static FileEditorMappingContentProvider INSTANCE = new FileEditorMappingContentProvider();
35  
36      /**
37       * Creates an instance of this class.  The private visibility of this
38       * constructor ensures that this class is only usable as a singleton.
39       */
40      private FileEditorMappingContentProvider() {
41          super();
42      }
43  
44      /* (non-Javadoc)
45       * Method declared on IContentProvider.
46       */
47      public void dispose() {
48      }
49  
50      /* (non-Javadoc)
51       * Method declared on IStructuredContentProvider.
52       */
53      public Object  [] getElements(Object   element) {
54          IFileEditorMapping[] array = (IFileEditorMapping[]) element;
55          return array == null ? new Object  [0] : array;
56      }
57  
58      /* (non-Javadoc)
59       * Method declared on IContentProvider.
60       */
61      public void inputChanged(Viewer viewer, Object   oldInput, Object   newInput) {
62      }
63  }
64
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