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Java > Open Source Codes > org > netbeans > api > java > source > transform > TreeChange


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
20 package org.netbeans.api.java.source.transform;
21
22 import com.sun.source.tree.Tree;
23 import java.util.Map JavaDoc;
24
25 /**
26  * A Change which consists of a single tree replacement.
27  */
28 public class TreeChange implements Change {
29     private Tree oldTree;
30     private Tree newTree;
31     
32     public TreeChange(Tree oldTree, Tree newTree) {
33         this.oldTree = oldTree;
34         this.newTree = newTree;
35     }
36
37     /**
38      * Returns the changed tree, or null if no change exists for the
39      * specified tree.
40      */
41     public Tree getChange(Tree oldTree) {
42         return (this.oldTree == oldTree) ? newTree : null;
43     }
44
45     /**
46      * Returns the old tree for a specified new one, or null if no
47      * original exists for the specified tree.
48      */
49     public Tree getOriginal(Tree newTree) {
50         return (this.newTree == newTree) ? oldTree : null;
51     }
52
53     /**
54      * Returns true if this Change has a replacement for a specified tree.
55      */
56     public boolean hasChange(Tree old) {
57         return (this.oldTree == oldTree);
58     }
59
60     /**
61      * Returns true if this Change has an original for a specified tree.
62      */
63     public boolean hasOriginal(Tree newTree) {
64         return (this.newTree == newTree);
65     }
66     
67     /**
68      * Copies all changes into a specified Map.
69      */
70     public void addToMap(Map JavaDoc<Tree,Tree> map) {
71         map.put(oldTree, newTree);
72     }
73 }
74
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