AbstractObservableMapping


1   /*******************************************************************************
2    * Copyright (c) 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  
12  package org.eclipse.jface.internal.databinding.provisional.observable.mapping;
13  
14  
15  import org.eclipse.jface.internal.databinding.provisional.observable.ObservableTracker;
16  
17  /**
18   * @since 1.0
19   * 
20   */
21  public abstract class AbstractObservableMapping extends BaseObservableMapping
22          implements IObservableMapping {
23  
24      final public Object   getMappingValue(Object   element) {
25          ObservableTracker.getterCalled(this);
26          return doGetMappingValue(element);
27      }
28      
29      public void setMappingValue(Object   element, Object   value) {
30          throw new UnsupportedOperationException  ();
31      }
32  
33      /**
34       * @return the value of this mapping for the given element
35       */
36      abstract protected Object   doGetMappingValue(Object   element);
37  
38      public boolean isStale() {
39          return false;
40      }
41      
42      public void dispose() {
43          mappingChangeListeners = null;
44          super.dispose();
45      }
46  }
47

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