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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 2000-2001,2003 (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 Long type. 49 * 50 * @version $Revision: 1.1 $ $Date: 2003/08/09 15:49:50 $ 51 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a> 52 * @see SNumber 53 */ 54 final class SLong extends SNumber { 55 56 /*** 57 * The wrapped value 58 */ 59 private long _value; 60 61 /*** 62 * Construct a new <code>SLong</code> 63 * 64 * @param value the underlying value 65 */ 66 public SLong(final long value) { 67 _value = value; 68 } 69 70 /*** 71 * Returns the addition of a number to this 72 * 73 * @param number the number to add 74 * @return the value of <code>this + number<code> 75 */ 76 public SNumber add(final SNumber number) { 77 SNumber result; 78 if (number instanceof SDouble) { 79 result = promote().add(number); 80 } else { 81 result = new SLong(_value + number.getLong()); 82 } 83 return result; 84 } 85 86 /*** 87 * Returns the value of the substraction of a number from this 88 * 89 * @param number the number to subtract 90 * @return the value of <code>this - number<code> 91 */ 92 public SNumber subtract(final SNumber number) { 93 SNumber result; 94 if (number instanceof SDouble) { 95 result = promote().subtract(number); 96 } else { 97 result = new SLong(_value - number.getLong()); 98 } 99 return result; 100 } 101 102 /*** 103 * Returns the multiplication of a number to this 104 * 105 * @param number the number to multiply 106 * @return the value of <code>this * number<code> 107 */ 108 public SNumber multiply(final SNumber number) { 109 SNumber result; 110 if (number instanceof SDouble) { 111 result = promote().multiply(number); 112 } else { 113 result = new SLong(_value * number.getLong()); 114 } 115 return result; 116 } 117 118 /*** 119 * Returns the division of a number from this 120 * 121 * @param number the number to divide 122 * @return the value of <code>this / number<code> 123 */ 124 public SNumber divide(final SNumber number) { 125 SNumber result = null; 126 try { 127 if (number instanceof SDouble) { 128 result = promote().divide(number); 129 } else { 130 result = new SLong(_value / number.getLong()); 131 } 132 } catch (ArithmeticException ignore) { 133 } 134 return result; 135 } 136 137 /*** 138 * Returns the value of this as a <code>long</code> 139 * 140 * @return the value of this as a <code>long</code> 141 */ 142 public long getLong() { 143 return _value; 144 } 145 146 /*** 147 * Returns the value of this as a <code>double</code> 148 * 149 * @return the value of this as a <code>double</code> 150 */ 151 public double getDouble() { 152 return _value; 153 } 154 155 /*** 156 * Returns the value of this, wrapped in a <code>Long</code> 157 * 158 * @return the value of this, wrapped in a <code>Long</code> 159 */ 160 public Object getObject() { 161 return new Long(_value); 162 } 163 164 /*** 165 * Determines if this is equal to another object. 166 * 167 * @param obj the object to compare. An instance of <code>SNumber</code> 168 * @return <code>SBool.TRUE</code> if <code>this = obj</code>, otherwise 169 * <code>SBool.FALSE</code> 170 */ 171 public SBool equal(final SObject obj) { 172 SBool result = null; 173 if (obj instanceof SLong) { 174 long rhs = ((SNumber) obj).getLong(); 175 if (_value == rhs) { 176 result = SBool.TRUE; 177 } else { 178 result = SBool.FALSE; 179 } 180 } else if (obj instanceof SDouble) { 181 result = promote().equal(obj); 182 } 183 return result; 184 } 185 186 /*** 187 * Determines if this is less than another object. 188 * 189 * @param obj the object to compare. An instance of <code>SNumber</code> 190 * @return <code>SBool.TRUE</code> if <code>this < obj</code>, otherwise 191 * <code>SBool.FALSE</code> 192 */ 193 public SBool less(final SObject obj) { 194 SBool result = null; 195 if (obj instanceof SLong) { 196 long rhs = ((SNumber) obj).getLong(); 197 if (_value < rhs) { 198 result = SBool.TRUE; 199 } else { 200 result = SBool.FALSE; 201 } 202 } else if (obj instanceof SDouble) { 203 result = promote().less(obj); 204 } 205 return result; 206 } 207 208 /*** 209 * Determines if this is greater than another object. 210 * 211 * @param obj the object to compare. An instance of <code>SNumber</code> 212 * @return <code>SBool.TRUE</code> if <code>this > obj</code>, otherwise 213 * <code>SBool.FALSE</code> 214 */ 215 public SBool greater(final SObject obj) { 216 SBool result = null; 217 if (obj instanceof SLong) { 218 long rhs = ((SNumber) obj).getLong(); 219 if (_value > rhs) { 220 result = SBool.TRUE; 221 } else { 222 result = SBool.FALSE; 223 } 224 } else if (obj instanceof SDouble) { 225 result = promote().greater(obj); 226 } 227 return result; 228 } 229 230 /*** 231 * Promotes this to a double 232 * 233 * @return the value of this as a double 234 */ 235 private SDouble promote() { 236 return new SDouble(_value); 237 } 238 239 } //-- SLong

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