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1 /*** 2 * Redistribution and use of this software and associated documentation 3 * ("Software"), with or without modification, are permitted provided 4 * that the following conditions are met: 5 * 6 * 1. Redistributions of source code must retain copyright 7 * statements and notices. Redistributions must also contain a 8 * copy of this document. 9 * 10 * 2. Redistributions in binary form must reproduce the 11 * above copyright notice, this list of conditions and the 12 * following disclaimer in the documentation and/or other 13 * materials provided with the distribution. 14 * 15 * 3. The name "Exolab" must not be used to endorse or promote 16 * products derived from this Software without prior written 17 * permission of Exoffice Technologies. For written permission, 18 * please contact info@exolab.org. 19 * 20 * 4. Products derived from this Software may not be called "Exolab" 21 * nor may "Exolab" appear in their names without prior written 22 * permission of Exoffice Technologies. Exolab is a registered 23 * trademark of Exoffice Technologies. 24 * 25 * 5. Due credit should be given to the Exolab Project 26 * (http://www.exolab.org/). 27 * 28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT 30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 39 * OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Copyright 2000,2001 (C) Exoffice Technologies Inc. All Rights Reserved. 42 */ 43 44 package org.exolab.jms.selector; 45 46 47 /*** 48 * This class is an adapter for the Double type. 49 * 50 * @version $Revision: 1.1 $ $Date: 2003/08/09 15:49:50 $ 51 * @author <a href="mailto:tima@intalio.com">Tim Anderson</a> 52 * @see SNumber 53 */ 54 final class SDouble extends SNumber { 55 56 /*** 57 * The wrapped value 58 */ 59 private final double _value; 60 61 /*** 62 * Construct a new <code>SDouble</code>, initialised to <code>0</code> 63 */ 64 public SDouble() { 65 _value = 0; 66 } 67 68 /*** 69 * Construct a new <code>SDouble</code> 70 * 71 * @param value the underlying value 72 */ 73 public SDouble(final double value) { 74 _value = value; 75 } 76 77 /*** 78 * Returns the addition of a number to this 79 * 80 * @param number the number to add 81 * @return the value of <code>this + number<code> 82 */ 83 public SNumber add(final SNumber number) { 84 return new SDouble(_value + number.getDouble()); 85 } 86 87 /*** 88 * Returns the value of the substraction of a number from this 89 * 90 * @param number the number to subtract 91 * @return the value of <code>this - number<code> 92 */ 93 public SNumber subtract(final SNumber number) { 94 return new SDouble(_value - number.getDouble()); 95 } 96 97 /*** 98 * Returns the multiplication of a number to this 99 * 100 * @param number the number to multiply 101 * @return the value of <code>this * number<code> 102 */ 103 public SNumber multiply(final SNumber number) { 104 return new SDouble(_value * number.getDouble()); 105 } 106 107 /*** 108 * Returns the division of a number from this 109 * 110 * @param number the number to divide 111 * @return the value of <code>this / number<code> 112 */ 113 public SNumber divide(final SNumber number) { 114 SNumber result = null; 115 try { 116 result = new SDouble(_value / number.getDouble()); 117 } catch (ArithmeticException ignore) { 118 } 119 return result; 120 } 121 122 /*** 123 * Returns the value of this as a <code>long</code> 124 * 125 * @return the value of this as a <code>long</code> 126 */ 127 public long getLong() { 128 return (long) _value; 129 } 130 131 /*** 132 * Returns the value of this as a <code>double</code> 133 * 134 * @return the value of this as a <code>double</code> 135 */ 136 public double getDouble() { 137 return _value; 138 } 139 140 /*** 141 * Returns the value of this, wrapped in a <code>Double</code> 142 * 143 * @return the value of this, wrapped in a <code>Double</code> 144 */ 145 public Object getObject() { 146 return new Double(_value); 147 } 148 149 /*** 150 * Determines if this is equal to another object. 151 * 152 * @param obj the object to compare. An instance of <code>SNumber</code> 153 * @return <code>SBool.TRUE</code> if <code>this = obj</code>, otherwise 154 * <code>SBool.FALSE</code> 155 */ 156 public SBool equal(final SObject obj) { 157 SBool result = SBool.FALSE; 158 double rhs = ((SNumber) obj).getDouble(); 159 if (_value == rhs) { 160 result = SBool.TRUE; 161 } 162 return result; 163 } 164 165 /*** 166 * Determines if this is less than another object. 167 * 168 * @param obj the object to compare. An instance of <code>SNumber</code> 169 * @return <code>SBool.TRUE</code> if <code>this < obj</code>, otherwise 170 * <code>SBool.FALSE</code> 171 */ 172 public SBool less(final SObject obj) { 173 SBool result = SBool.FALSE; 174 double rhs = ((SNumber) obj).getDouble(); 175 if (_value < rhs) { 176 result = SBool.TRUE; 177 } 178 return result; 179 } 180 181 /*** 182 * Determines if this is greater than another object. 183 * 184 * @param obj the object to compare. An instance of <code>SNumber</code> 185 * @return <code>SBool.TRUE</code> if <code>this > obj</code>, otherwise 186 * <code>SBool.FALSE</code> 187 */ 188 public SBool greater(final SObject obj) { 189 SBool result = SBool.FALSE; 190 double rhs = ((SNumber) obj).getDouble(); 191 if (_value > rhs) { 192 result = SBool.TRUE; 193 } 194 return result; 195 } 196 197 } //-- SDouble

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