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'rapiddweller Common' is an open source Java library
forked from Databene Commons by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* 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 com.rapiddweller.common.converter;
import com.rapiddweller.common.Converter;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* 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 {
/**
* Instantiates a new Number to number converter.
*
* @param targetType the target type
*/
@SuppressWarnings("unchecked")
public NumberToNumberConverter(Class targetType) {
this((Class) Number.class, targetType);
}
/**
* Instantiates a new Number to number converter.
*
* @param sourceType the source type
* @param targetType the target type
*/
@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 the type to convert the number to
* @param src the number to convert
* @param targetType the target number type of the conversion
* @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);
}
}
}