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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
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/*
* Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
* All rights reserved.
*
* 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.databene.commons.converter;
import org.databene.commons.Converter;
import java.math.BigInteger;
import java.math.BigDecimal;
/**
* Converts Number objects of one type to another Number type.
* Created: 16.06.2007 11:51:14
* @param the number type to convert from
* @param the number type to convert to
* @author Volker Bergmann
*/
public class NumberToNumberConverter extends ConverterProxy {
@SuppressWarnings("unchecked")
public NumberToNumberConverter(Class targetType) {
this((Class) Number.class, targetType);
}
@SuppressWarnings("unchecked")
public NumberToNumberConverter(Class sourceType, Class targetType) {
super((Converter) createConverter(targetType));
}
private static Converter createConverter(Class targetType) {
if (Integer.class == targetType || int.class == targetType)
return new Number2IntegerConverter();
else if (Long.class == targetType || long.class == targetType)
return new Number2LongConverter();
else if (Byte.class == targetType || byte.class == targetType)
return new Number2ByteConverter();
else if (Short.class == targetType || short.class == targetType)
return new Number2ShortConverter();
else if (Double.class == targetType || double.class == targetType)
return new Number2DoubleConverter();
else if (Float.class.equals(targetType) || float.class == targetType)
return new Number2FloatConverter();
else if (BigInteger.class.equals(targetType))
return new Number2BigIntegerConverter();
else if (BigDecimal.class.equals(targetType))
return new Number2BigDecimalConverter();
else
throw new IllegalArgumentException("Not a supported number type: " + targetType);
}
/**
* Converts a number of one number type to another number type.
* @param src the number to convert
* @param targetType the target number type of the conversion
* @param the type to convert the number to
* @return an object of the target number type
*/
@SuppressWarnings("unchecked")
public static TT convert(Number src, Class targetType) {
if (src == null)
return null;
else if (Integer.class == targetType || int.class == targetType)
return (TT) Integer.valueOf(src.intValue());
else if (Long.class == targetType || long.class == targetType)
return (TT) Long.valueOf(src.longValue());
else if (Byte.class == targetType || byte.class == targetType)
return (TT) Byte.valueOf(src.byteValue());
else if (Short.class == targetType || short.class == targetType)
return (TT) Short.valueOf(src.byteValue());
else if (Double.class == targetType || double.class == targetType)
return (TT) Double.valueOf(src.doubleValue());
else if (Float.class.equals(targetType) || float.class == targetType)
return (TT) Float.valueOf(src.floatValue());
else if (BigInteger.class.equals(targetType))
return (TT) BigInteger.valueOf(src.longValue());
else if (BigDecimal.class.equals(targetType))
return (TT) BigDecimal.valueOf(src.doubleValue());
else
throw new IllegalArgumentException("Not a supported number type: " + targetType);
}
}