StructuralEvent


1   package org.oddjob.structural;
2   
3   import java.io.Serializable  ;
4   import java.util.EventObject  ;
5   
6   /**
7    * This event is fire by an implementer of the Strucutral interface when its
8    * strucuture changes.
9    * 
10   * @author Rob Gordon
11   */
12  public class StructuralEvent extends EventObject   
13          implements Serializable   {
14  
15      /** The child that has been added or just removed */
16      private final Object   child;
17      
18      /** The position the child was added or removed (starting at 0). */
19      private final int index;
20      
21      /**
22       * Constructor.
23       * 
24       * @param source The source of the event. Generally the parent.
25       * @param child The child object that has been added or removed.
26       * @param index The position where it was added or removed (starting at 0).
27       */
28      public StructuralEvent(Object   source, Object   child, int index) {
29          
30          super(source);
31          this.child = child;
32          this.index = index;
33      }
34      
35      /**
36       * Get the child.
37       * 
38       * @return The child.
39       */
40      public Object   getChild() {
41          
42          return this.child;
43      }
44      
45      /**
46       * Get the index.
47       * 
48       * @return The index.
49       */
50      public int getIndex() {
51          
52          return this.index;
53      }
54  }
55

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