1    /* 
2     * Javassist, a Java-bytecode translator toolkit. 
3     * Copyright (C) 1999-2003 Shigeru Chiba. All Rights Reserved. 
4     * 
5     * The contents of this file are subject to the Mozilla Public License Version 
6     * 1.1 (the "License"); you may not use this file except in compliance with 
7     * the License.  Alternatively, the contents of this file may be used under 
8     * the terms of the GNU Lesser General Public License Version 2.1 or later. 
9     * 
10    * Software distributed under the License is distributed on an "AS IS" basis, 
11    * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License 
12    * for the specific language governing rights and limitations under the 
13    * License. 
14    */ 
15    
16   package javassist.compiler.ast; 
17    
18   import javassist.compiler.CompileError; 
19    
20   /** 
21    * A node of a a binary tree.  This class provides concrete methods 
22    * overriding abstract methods in ASTree. 
23    */ 
24   public class Pair extends ASTree { 
25       protected ASTree left, right; 
26    
27       public Pair(ASTree _left, ASTree _right) { 
28           left = _left; 
29           right = _right; 
30       } 
31    
32       public void accept(Visitor v) throws CompileError { 
33           v.atPair(this); 
34       } 
35    
36       public String toString() { 
37           StringBuffer sbuf = new StringBuffer(); 
38           sbuf.append("(<Pair> "); 
39           sbuf.append(left == null ? "<null>" : left.toString()); 
40           sbuf.append(" . "); 
41           sbuf.append(right == null ? "<null>" : right.toString()); 
42           sbuf.append(')'); 
43           return sbuf.toString(); 
44       } 
45    
46       public ASTree getLeft() { 
47           return left; 
48       } 
49    
50       public ASTree getRight() { 
51           return right; 
52       } 
53    
54       public void setLeft(ASTree _left) { 
55           left = _left; 
56       } 
57    
58       public void setRight(ASTree _right) { 
59           right = _right; 
60       } 
61   } 
62