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Java > Open Source Codes > org > apache > commons > math > util > NumberTransformer


1 /*
2  * Copyright 2003-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.math.util;
17
18 import org.apache.commons.math.MathException;
19
20 /**
21  * Subclasses implementing this interface can transform Objects to doubles.
22  * @version $Revision$ $Date: 2005-02-26 05:11:52 -0800 (Sat, 26 Feb 2005) $
23  */
24 public interface NumberTransformer {
25     
26     /**
27      * Implementing this interface provides a facility to transform
28      * from Object to Double.
29      *
30      * @param o the Object to be transformed.
31      * @return the double value of the Object.
32      * @throws MathException if the Object can not be transformed into a Double.
33      */
34     double transform(Object JavaDoc o) throws MathException;
35 }
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