/*
 * The Apache Software License, Version 1.1
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 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
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 *    distribution.
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 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
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package org.apache.commons.el;

import java.math.BigDecimal;
import java.math.BigInteger;

/**
 *
 * <p>The implementation of the minus operator
 * 
 * @author Nathan Abramson - Art Technology Group
 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
 **/

public class MinusOperator
  extends ArithmeticOperator
{
  //-------------------------------------
  // Singleton
  //-------------------------------------

  public static final MinusOperator SINGLETON =
    new MinusOperator ();

  //-------------------------------------
  /**
   *
   * Constructor
   **/
  public MinusOperator ()
  {
  }

  //-------------------------------------
  // Expression methods
  //-------------------------------------
  /**
   *
   * Returns the symbol representing the operator
   **/
  public String getOperatorSymbol () {
    return "-";
  }

  //-------------------------------------
  /**
   *
   * Applies the operator to the given double values, returning a double
   **/
  public double apply (double pLeft, double pRight) {
    return pLeft - pRight;
  }
  
  //-------------------------------------
  /**
   *
   * Applies the operator to the given double values, returning a double
   **/
  public long apply (long pLeft, long pRight) {
    return pLeft - pRight;
  }
  
  //-------------------------------------

    /**
     *
     * Applies the operator to the given BigDecimal values, returning a BigDecimal.
     **/
    public BigDecimal apply(BigDecimal pLeft, BigDecimal pRight) {
        return pLeft.subtract(pRight);
    }

    //-------------------------------------

    /**
     *
     * Applies the operator to the given BigInteger values, returning a BigInteger.
     **/
    public BigInteger apply(BigInteger pLeft, BigInteger pRight) {
        return pLeft.subtract(pRight);
    }

    //-------------------------------------
}