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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.ConversionException;
import com.rapiddweller.common.Converter;
/**
* Wraps another Converter and adds the feature of converting null values to a predefined value.
* Created: 26.07.2007 06:59:35
*
* @param the object type to convert from
* @param the object type to convert to
* @author Volker Bergmann
*/
public class NullSafeConverterProxy extends ConverterProxy {
/**
* The Null result.
*/
protected T nullResult;
/**
* Instantiates a new Null safe converter proxy.
*
* @param realConverter the real converter
* @param nullResult the null result
*/
public NullSafeConverterProxy(Converter realConverter, T nullResult) {
super(realConverter);
this.nullResult = nullResult;
}
@Override
public Class getTargetType() {
return realConverter.getTargetType();
}
@Override
public T convert(S sourceValue) throws ConversionException {
return (sourceValue != null ? realConverter.convert(sourceValue) : nullResult);
}
}