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Java > Open Source Codes > org > mr > api > jms > selector > syntax > Subtract


1 /*
2  * Copyright 2002 by
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7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
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14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
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18  * The Initial Developer of the Original Code is Coridan.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
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25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
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33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
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36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
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41  * This library is distributed in the hope that it will be useful, but WITHOUT
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46 package org.mr.api.jms.selector.syntax;
47
48
49 /**
50  * This class implements a '-' expression.
51  *
52  */

53 class Subtract extends MathOperator {
54
55     /**
56      * Construct a new Subtract operator
57      *
58      * @param leftHand the left hand side of the expression
59      * @param rightHand the right hand side of the expression
60      */

61     public Subtract(final Expression leftHand, final Expression rightHand) {
62         super("-", leftHand, rightHand);
63     }//Subtract
64

65     
66     /**
67      * Evaluate the expression
68      *
69      * @param leftHand the left hand side of the expression
70      * @param rightHand the right hand side of the expression
71      * @return the value of leftHand - rightHand
72      */

73     protected final MantaNumber evaluate(final MantaNumber leftHand, final MantaNumber rightHand) {
74         return leftHand.subtract(rightHand);
75     }//evaluate
76
}//Subtract
77
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