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.math.util; 18 19 import 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 */ 28 public 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
