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


1 /*
2  * JacORB - a free Java ORB
3  *
4  * Copyright (C) 1999-2004 Gerald Brose
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Library General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Library General Public License for more details.
15  *
16  * You should have received a copy of the GNU Library General Public
17  * License along with this library; if not, write to the Free
18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19  *
20  */
21 package org.jacorb.notification.filter.etcl;
22
23 import org.jacorb.notification.filter.EvaluationContext;
24 import org.jacorb.notification.filter.EvaluationException;
25 import org.jacorb.notification.filter.EvaluationResult;
26
27 import antlr.Token;
28
29 /** A simple node to represent GTE operation */
30 public class GteOperator extends BinaryOperator
31 {
32
33     public GteOperator(Token tok)
34     {
35         super(tok);
36         setName("GteOperator");
37     }
38
39     public EvaluationResult evaluate(EvaluationContext context, EvaluationResult left,
40             EvaluationResult right) throws EvaluationException
41     {
42
43         int _comp = left.compareTo(right);
44
45         if (_comp == -1)
46         {
47             return EvaluationResult.BOOL_FALSE;
48         }
49         return EvaluationResult.BOOL_TRUE;
50
51     }
52
53     public String JavaDoc toString()
54     {
55         return ">=";
56     }
57
58     public void acceptInOrder(AbstractTCLVisitor visitor) throws VisitorException
59     {
60         left().acceptInOrder(visitor);
61         visitor.visitGteOperator(this);
62         right().acceptInOrder(visitor);
63     }
64
65     public void acceptPostOrder(AbstractTCLVisitor visitor) throws VisitorException
66     {
67         left().acceptPostOrder(visitor);
68         right().acceptPostOrder(visitor);
69         visitor.visitGteOperator(this);
70     }
71
72     public void acceptPreOrder(AbstractTCLVisitor visitor) throws VisitorException
73     {
74         visitor.visitGteOperator(this);
75         left().acceptPreOrder(visitor);
76         right().acceptPreOrder(visitor);
77     }
78 }
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