001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.el;
018
019import java.math.BigDecimal;
020import java.math.BigInteger;
021
022/**
023 *
024 * <p>The implementation of the minus operator
025 * 
026 * @author Nathan Abramson - Art Technology Group
027 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $
028 **/
029
030public class MinusOperator
031  extends ArithmeticOperator
032{
033  //-------------------------------------
034  // Singleton
035  //-------------------------------------
036
037  public static final MinusOperator SINGLETON =
038    new MinusOperator ();
039
040  //-------------------------------------
041  /**
042   *
043   * Constructor
044   **/
045  public MinusOperator ()
046  {
047  }
048
049  //-------------------------------------
050  // Expression methods
051  //-------------------------------------
052  /**
053   *
054   * Returns the symbol representing the operator
055   **/
056  public String getOperatorSymbol () {
057    return "-";
058  }
059
060  //-------------------------------------
061  /**
062   *
063   * Applies the operator to the given double values, returning a double
064   **/
065  public double apply (double pLeft, double pRight) {
066    return pLeft - pRight;
067  }
068  
069  //-------------------------------------
070  /**
071   *
072   * Applies the operator to the given double values, returning a double
073   **/
074  public long apply (long pLeft, long pRight) {
075    return pLeft - pRight;
076  }
077  
078  //-------------------------------------
079
080    /**
081     *
082     * Applies the operator to the given BigDecimal values, returning a BigDecimal.
083     **/
084    public BigDecimal apply(BigDecimal pLeft, BigDecimal pRight) {
085        return pLeft.subtract(pRight);
086    }
087
088    //-------------------------------------
089
090    /**
091     *
092     * Applies the operator to the given BigInteger values, returning a BigInteger.
093     **/
094    public BigInteger apply(BigInteger pLeft, BigInteger pRight) {
095        return pLeft.subtract(pRight);
096    }
097
098    //-------------------------------------
099}