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Java > Open Source Codes > org > jacorb > notification > filter > etcl > DivOperator


1 package org.jacorb.notification.filter.etcl;
2
3 /*
4  * JacORB - a free Java ORB
5  *
6  * Copyright (C) 1999-2004 Gerald Brose
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Library General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Library General Public License for more details.
17  *
18  * You should have received a copy of the GNU Library General Public
19  * License along with this library; if not, write to the Free
20  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21  *
22  */
23
24 import org.jacorb.notification.filter.EvaluationContext;
25 import org.jacorb.notification.filter.EvaluationException;
26 import org.jacorb.notification.filter.EvaluationResult;
27
28 import antlr.Token;
29
30 /**
31  * A simple node to represent DIV operation
32  * @version $Id: DivOperator.java,v 1.5 2005/02/14 00:07:08 alphonse.bendt Exp $
33  */
34
35 public class DivOperator extends BinaryOperator {
36
37     public DivOperator(Token tok) {
38         super(tok);
39         setName("DivOperator");
40     }
41
42     public String JavaDoc toString() {
43         return " /";
44     }
45
46     public EvaluationResult evaluate(EvaluationContext context, EvaluationResult left, EvaluationResult right)
47         throws EvaluationException {
48
49         try {
50             return EvaluationResult.div(left, right);
51         } catch (ArithmeticException JavaDoc e) {
52             throw new EvaluationException(e.getMessage());
53         }
54     }
55
56     public void acceptInOrder(AbstractTCLVisitor visitor) throws VisitorException {
57         left().acceptInOrder(visitor);
58         visitor.visitDiv(this);
59         right().acceptInOrder(visitor);
60     }
61
62     public void acceptPostOrder(AbstractTCLVisitor visitor) throws VisitorException {
63         left().acceptPostOrder(visitor);
64         right().acceptPostOrder(visitor);
65         visitor.visitDiv(this);
66     }
67
68     public void acceptPreOrder(AbstractTCLVisitor visitor) throws VisitorException {
69         visitor.visitDiv(this);
70         left().acceptPreOrder(visitor);
71         right().acceptPreOrder(visitor);
72     }
73 }
74
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