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: 155427 $ $Date: 2005-02-26 06:11:52 -0700 (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 o) throws MathException;
35 }