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 */
17package org.apache.commons.math.util;
18
19import org.apache.commons.math.MathException;
20
21/**
22 * Subclasses implementing this interface can transform Objects to doubles.
23 * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $
24 *
25 * No longer extends Serializable since 2.0
26 *
27 */
28public interface NumberTransformer {
29
30    /**
31     * Implementing this interface provides a facility to transform
32     * from Object to Double.
33     *
34     * @param o the Object to be transformed.
35     * @return the double value of the Object.
36     * @throws MathException if the Object can not be transformed into a Double.
37     */
38    double transform(Object o) throws MathException;
39}
40