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Java > Open Source Codes > org > objectweb > medor > expression > lib > BasicBinaryOperator


1 /**
2  * MEDOR: Middleware Enabling Distributed Object Requests
3  *
4  * Copyright (C) 2001-2003 France Telecom R&D
5  * Contact: alexandre.lefebvre@rd.francetelecom.com
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  *
21  * Initial developers: M. Alia, A. Lefebvre
22  */
23
24 package org.objectweb.medor.expression.lib;
25
26 import org.objectweb.medor.expression.api.BinaryOperator;
27 import org.objectweb.medor.expression.api.Expression;
28 import org.objectweb.jorm.type.api.PType;
29
30 /**
31  *
32  * @author Sebastien Chassande-Barrioz
33  */
34 public abstract class BasicBinaryOperator extends BasicOperator
35         implements BinaryOperator {
36
37     public BasicBinaryOperator() {
38         super(new Expression[2]);
39     }
40
41     public BasicBinaryOperator(Expression e0, Expression e1) {
42         super(new Expression[]{e0, e1});
43     }
44
45     public BasicBinaryOperator(PType type) {
46         super(type, new Expression[2]);
47     }
48
49     public BasicBinaryOperator(PType type, Expression e0, Expression e1) {
50         super(type, new Expression[]{e0, e1});
51     }
52
53     // IMPLEMENTATION OF THE BinaryOperator INTERFACE //
54 //------------------------------------------------//
55
56     public void setLeftExpression(Expression leftChild)
57         throws IllegalStateException JavaDoc {
58         if (!verified) {
59             expressions[0] = leftChild;
60         }
61         else
62             throw new IllegalStateException JavaDoc("Compiled expression can't be modified");
63     }
64
65     public void setRightExpression(Expression rightChild)
66         throws IllegalStateException JavaDoc {
67         if (!verified) {
68             expressions[1] = rightChild;
69         }
70         else
71             throw new IllegalStateException JavaDoc("Compiled expression can't be modified");
72     }
73
74     public Expression getLeftExpression() {
75         return expressions[0];
76     }
77
78     public Expression getRightExpression() {
79         return expressions[1];
80     }
81
82 }
83
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