ArrayContentProvider


1   /************************************************************************
2   Copyright (c) 2003 IBM Corporation and others.
3   All rights reserved.   This program and the accompanying materials
4   are made available under the terms of the Common Public License v1.0
5   which accompanies this distribution, and is available at
6   http://www.eclipse.org/legal/cpl-v10.html
7   
8   Contributors:
9       IBM - Initial implementation
10  ************************************************************************/
11  
12  package com.bull.eclipse.jonas;
13  
14  import java.util.Collection  ;
15  
16  import org.eclipse.jface.viewers.IStructuredContentProvider;
17  import org.eclipse.jface.viewers.Viewer;
18  
19  /**
20   * This implementation of <code>IStructuredContentProvider</code> handles
21   * the case where the input is an unchanging array or collection of elements.
22   */
23  public class ArrayContentProvider implements IStructuredContentProvider {
24      
25      /**
26       * Returns the elements in the input, which must be either an array or a
27       * <code>Collection</code>. 
28       */
29      public Object  [] getElements(Object   inputElement) {
30          if (inputElement instanceof Object  [])
31              return (Object  []) inputElement;
32          if (inputElement instanceof Collection  )
33              return ((Collection  ) inputElement).toArray();
34          return new Object  [0];
35      }
36      
37      /**
38       * This implementation does nothing.
39       */
40      public void inputChanged(Viewer viewer, Object   oldInput, Object   newInput) {
41      }
42  
43      /**
44       * This implementation does nothing.
45       */
46      public void dispose() {
47      }
48  }

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