1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.el;
18
19 import java.math.BigDecimal;
20 import java.math.BigInteger;
21
22 /**
23 *
24 * <p>The implementation of the minus operator
25 *
26 * @author Nathan Abramson - Art Technology Group
27 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: bayard $
28 **/
29
30 public class MinusOperator
31 extends ArithmeticOperator
32 {
33 //-------------------------------------
34 // Singleton
35 //-------------------------------------
36
37 public static final MinusOperator SINGLETON =
38 new MinusOperator ();
39
40 //-------------------------------------
41 /**
42 *
43 * Constructor
44 **/
45 public MinusOperator ()
46 {
47 }
48
49 //-------------------------------------
50 // Expression methods
51 //-------------------------------------
52 /**
53 *
54 * Returns the symbol representing the operator
55 **/
56 public String getOperatorSymbol () {
57 return "-";
58 }
59
60 //-------------------------------------
61 /**
62 *
63 * Applies the operator to the given double values, returning a double
64 **/
65 public double apply (double pLeft, double pRight) {
66 return pLeft - pRight;
67 }
68
69 //-------------------------------------
70 /**
71 *
72 * Applies the operator to the given double values, returning a double
73 **/
74 public long apply (long pLeft, long pRight) {
75 return pLeft - pRight;
76 }
77
78 //-------------------------------------
79
80 /**
81 *
82 * Applies the operator to the given BigDecimal values, returning a BigDecimal.
83 **/
84 public BigDecimal apply(BigDecimal pLeft, BigDecimal pRight) {
85 return pLeft.subtract(pRight);
86 }
87
88 //-------------------------------------
89
90 /**
91 *
92 * Applies the operator to the given BigInteger values, returning a BigInteger.
93 **/
94 public BigInteger apply(BigInteger pLeft, BigInteger pRight) {
95 return pLeft.subtract(pRight);
96 }
97
98 //-------------------------------------
99 }