001: /*
002: * The Apache Software License, Version 1.1
003: *
004: * Copyright (c) 1999 The Apache Software Foundation. All rights
005: * reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * 1. Redistributions of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The end-user documentation included with the redistribution, if
020: * any, must include the following acknowlegement:
021: * "This product includes software developed by the
022: * Apache Software Foundation (http://www.apache.org/)."
023: * Alternately, this acknowlegement may appear in the software itself,
024: * if and wherever such third-party acknowlegements normally appear.
025: *
026: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
027: * Foundation" must not be used to endorse or promote products derived
028: * from this software without prior written permission. For written
029: * permission, please contact apache@apache.org.
030: *
031: * 5. Products derived from this software may not be called "Apache"
032: * nor may "Apache" appear in their names without prior written
033: * permission of the Apache Group.
034: *
035: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: *
049: * This software consists of voluntary contributions made by many
050: * individuals on behalf of the Apache Software Foundation. For more
051: * information on the Apache Software Foundation, please see
052: * <http://www.apache.org/>.
053: *
054: */
055:
056: package org.apache.commons.el;
057:
058: import java.math.BigDecimal;
059: import java.math.BigInteger;
060:
061: /**
062: *
063: * <p>The implementation of the minus operator
064: *
065: * @author Nathan Abramson - Art Technology Group
066: * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
067: **/
068:
069: public class MinusOperator extends ArithmeticOperator {
070: //-------------------------------------
071: // Singleton
072: //-------------------------------------
073:
074: public static final MinusOperator SINGLETON = new MinusOperator();
075:
076: //-------------------------------------
077: /**
078: *
079: * Constructor
080: **/
081: public MinusOperator() {
082: }
083:
084: //-------------------------------------
085: // Expression methods
086: //-------------------------------------
087: /**
088: *
089: * Returns the symbol representing the operator
090: **/
091: public String getOperatorSymbol() {
092: return "-";
093: }
094:
095: //-------------------------------------
096: /**
097: *
098: * Applies the operator to the given double values, returning a double
099: **/
100: public double apply(double pLeft, double pRight) {
101: return pLeft - pRight;
102: }
103:
104: //-------------------------------------
105: /**
106: *
107: * Applies the operator to the given double values, returning a double
108: **/
109: public long apply(long pLeft, long pRight) {
110: return pLeft - pRight;
111: }
112:
113: //-------------------------------------
114:
115: /**
116: *
117: * Applies the operator to the given BigDecimal values, returning a BigDecimal.
118: **/
119: public BigDecimal apply(BigDecimal pLeft, BigDecimal pRight) {
120: return pLeft.subtract(pRight);
121: }
122:
123: //-------------------------------------
124:
125: /**
126: *
127: * Applies the operator to the given BigInteger values, returning a BigInteger.
128: **/
129: public BigInteger apply(BigInteger pLeft, BigInteger pRight) {
130: return pLeft.subtract(pRight);
131: }
132:
133: //-------------------------------------
134: }
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