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Java > Open Source Codes > org > netbeans > tax > TreeNode


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19 package org.netbeans.tax;
20
21 import java.beans.PropertyChangeListener JavaDoc;
22
23 import org.netbeans.tax.event.TreeEventManager;
24 import org.netbeans.tax.event.TreeEvent;
25
26 /**
27  * Tree node adds notion of owner document.
28  *
29  * @author Libor Kramolis
30  * @version 0.1
31  */
32 public abstract class TreeNode extends TreeObject {
33
34     /** */
35     public static final String JavaDoc PROP_NODE = "this"; // NOI18N
36
37
38     //
39 // init
40 //
41
42     /** Creates new TreeNode. */
43     protected TreeNode () {
44     }
45
46
47     /**
48      * Creates new TreeNode - copy constructor.
49      */
50     protected TreeNode (TreeNode node) {
51         super (node);
52     }
53     
54     
55     //
56 // itself
57 //
58
59     /**
60      * Traverse to the owner document and return it.
61      */
62     public abstract TreeDocumentRoot getOwnerDocument ();
63     
64     
65     //
66 // Event support
67 //
68
69     /** Get assigned event manager assigned to ownerDocument.
70      * If this node does not have its one, it returns null;
71      * @return assigned event manager (may be null).
72      */
73     public final TreeEventManager getEventManager () {
74         if ( getOwnerDocument () == null ) {
75             return null;
76         }
77         return getOwnerDocument ().getRootEventManager ();
78     }
79     
80 }
81
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