/*
* Copyright 2003-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.math.util;
import java.io.Serializable;
import org.apache.commons.math.MathException;
/**
* A Default NumberTransformer for java.lang.Numbers and Numeric Strings. This
* provides some simple conversion capabilities to turn any java/lang.Number
* into a primitive double or to turn a String representation of a Number into
* a double.
*
* @version $Revision: 348519 $ $Date: 2005-11-23 12:12:18 -0700 (Wed, 23 Nov 2005) $
*/
public class DefaultTransformer implements NumberTransformer, Serializable {
/** Serializable version identifier */
private static final long serialVersionUID = 4019938025047800455L;
/**
* @param o the object that gets transformed.
* @return a double primitive representation of the Object o.
* @throws org.apache.commons.math.MathException If it cannot successfully
* be transformed or is null.
* @see org.apache.commons.collections.Transformer#transform(java.lang.Object)
*/
public double transform(Object o) throws MathException{
if (o == null) {
throw new MathException("Conversion Exception in Transformation, Object is null");
}
if (o instanceof Number) {
return ((Number)o).doubleValue();
}
try {
return new Double(o.toString()).doubleValue();
} catch (Exception e) {
throw new MathException("Conversion Exception in Transformation: " + e.getMessage(), e);
}
}
}