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Java > Open Source Codes > org > xquark > extractor > algebra > BinaryAtomicOp


1 /*
2  * This file belongs to the XQuark distribution.
3  * Copyright (C) 2003 Universite de Versailles Saint-Quentin.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307.
18  * You can also get it at http://www.gnu.org/licenses/lgpl.html
19  *
20  * For more information on this software, see http://www.xquark.org.
21  */
22
23 package org.xquark.extractor.algebra;
24
25
26 public abstract class BinaryAtomicOp extends BinaryOperator {
27
28     private static final String JavaDoc RCSRevision = "$Revision: 1.4 $";
29     private static final String JavaDoc RCSName = "$Name: $";
30
31
32     public BinaryAtomicOp() {
33     }
34
35     public BinaryAtomicOp(Expression leftOperand, Expression rightOperand)
36     {
37         super(leftOperand, rightOperand);
38     }
39
40     public boolean replaceChild(Expression oldChild, Expression newChild)
41     {
42         //Trace.enter(this, "replaceChild(Expression oldChild, Expression newChild)");
43
44         boolean retVal = false;
45         if (getLeftOperand() == oldChild) {
46             setLeftOperand(newChild);
47             retVal = true;
48         }
49         else if (getRightOperand()== oldChild) {
50             setRightOperand(newChild);
51             retVal = true;
52         }
53
54         //Trace.exit(this, "replaceChild(Expression oldChild, Expression newChild)");
55 return retVal;
56     }
57 }
58
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