KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > commons > math > function > simple > Power


1 /*
2  *
3  * Copyright (c) 2003-2004 The Apache Software Foundation. All rights reserved.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
6  * use this file except in compliance with the License. You may obtain a copy
7  * 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, WITHOUT
13  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
14  * License for the specific language governing permissions and limitations
15  * under the License.
16  *
17  */
18 package org.apache.commons.math.function.simple;
19
20 import java.io.Serializable JavaDoc;
21
22 import org.apache.commons.math.function.Evaluation;
23 import org.apache.commons.math.function.EvaluationContext;
24 import org.apache.commons.math.function.EvaluationException;
25
26
27 /**
28
29
30  */
31 public class Power implements Evaluation, Serializable JavaDoc {
32
33     private Evaluation argument;
34
35     private Evaluation power;
36     
37     public void setOperand(Evaluation argument) {
38         this.argument = argument;
39     }
40
41     public void setPower(Evaluation power) {
42         this.power = power;
43     }
44         
45     public Evaluation evaluate(EvaluationContext context) throws EvaluationException {
46         return context.evaluate(
47             Math.pow(
48                 context.doubleValue(argument),
49                 context.doubleValue(power)
50             )
51         );
52     }
53     
54     public String JavaDoc toString() {
55         return "Power";
56     }
57 }
Popular Tags