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


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
4  * <a HREF="mailto: support@coridan.com ">support@coridan.com</a>
5  *
6  * The contents of this file are subject to the Mozilla Public License Version
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/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
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.
21  *
22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
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
27  * provisions of LGPL are applicable instead of those above. If you wish to
28  * allow use of your version of this file only under the terms of the LGPL
29  * License and not to allow others to use your version of this file under
30  * the MPL, indicate your decision by deleting the provisions above and
31  * replace them with the notice and other provisions required by the LGPL.
32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
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.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */
46 package org.mr.api.jms.selector.syntax;
47
48
49 /**
50  * This class is an adapter for the Double type.
51  *
52  */
53 final class MantaDouble extends MantaNumber {
54
55     /**
56      * The wrapped value
57      */
58     private final double value;
59
60     /**
61      * Construct a new MantaDouble, initialised to 0
62      */
63     public MantaDouble() {
64         value = 0;
65     }//MantaDouble
66
67     
68     /**
69      * Construct a new MantaDouble
70      *
71      * @param value the underlying value
72      */
73     public MantaDouble(final double value) {
74         this.value = value;
75     }//MantaDouble
76
77     
78     /**
79      * Returns the addition of a number to this
80      *
81      * @param number the number to add
82      * @return the value of this + number
83      */
84     public MantaNumber add(final MantaNumber number) {
85         return new MantaDouble(value + number.getDouble());
86     }//add
87
88     
89     /**
90      * Returns the value of the substraction of a number from this
91      *
92      * @param number the number to subtract
93      * @return the value of this - number
94      */
95     public MantaNumber subtract(final MantaNumber number) {
96         return new MantaDouble(value - number.getDouble());
97     }//subtract
98
99     
100     /**
101      * Returns the multiplication of a number to this
102      *
103      * @param number the number to multiply
104      * @return the value of this * number
105      */
106     public MantaNumber multiply(final MantaNumber number) {
107         return new MantaDouble(value * number.getDouble());
108     }//multiply
109
110
111     /**
112      * Returns the division of a number from this
113      *
114      * @param number the number to divide
115      * @return the value of this / number
116      */
117     public MantaNumber divide(final MantaNumber number) {
118         MantaNumber result = null;
119         
120         try {
121             result = new MantaDouble(value / number.getDouble());
122         }//try
123 catch (ArithmeticException JavaDoc ignore) {
124         }//catch
125 return result;
126     }//divide
127
128
129     /**
130      * Returns the value of this as a long
131      *
132      * @return the value of this as a long
133      */
134     public long getLong() {
135         return (long) value;
136     }//getLong
137
138
139     /**
140      * Returns the value of this as a double
141      *
142      * @return the value of this as a double
143      */
144     public double getDouble() {
145         return value;
146     }//getDouble
147
148
149     /**
150      * Returns the value of this, wrapped in a Double
151      *
152      * @return the value of this, wrapped in a Double
153      */
154     public Object JavaDoc getObject() {
155         return new Double JavaDoc(value);
156     }//getObject
157
158
159     /**
160      * Determines if this is equal to another object.
161      *
162      * @param obj the object to compare. An instance of MantaNumber
163      * @return MantaBoolean.TRUE if this = obj, otherwise
164      * MantaBoolean.FALSE
165      */
166     public MantaBoolean equal(final MantaObject obj) {
167         MantaBoolean result = MantaBoolean.FALSE;
168         double rhs = ((MantaNumber) obj).getDouble();
169         if (value == rhs) {
170             result = MantaBoolean.TRUE;
171         }//if
172 return result;
173     }//equal
174
175
176     /**
177      * Determines if this is less than another object.
178      *
179      * @param obj the object to compare. An instance of MantaNumber
180      * @return MantaBoolean.TRUE if this &lt; obj, otherwise
181      * MantaBoolean.FALSE
182      */
183     public MantaBoolean less(final MantaObject obj) {
184         MantaBoolean result = MantaBoolean.FALSE;
185         double rightHand = ((MantaNumber) obj).getDouble();
186         
187         if (value < rightHand) {
188             result = MantaBoolean.TRUE;
189         }//if
190 return result;
191     }//less
192
193     
194     /**
195      * Determines if this is greater than another object.
196      *
197      * @param obj the object to compare. An instance of MantaNumber
198      * @return MantaBoolean.TRUE if this &gt; obj, otherwise
199      * MantaBoolean.FALSE
200      */
201     public MantaBoolean greater(final MantaObject obj) {
202         MantaBoolean result = MantaBoolean.FALSE;
203         double rightHand = ((MantaNumber) obj).getDouble();
204         
205         if (value > rightHand) {
206             result = MantaBoolean.TRUE;
207         }//if
208 return result;
209     }//greater
210 }//MantaDouble
211
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