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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.
/*
* 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.ConversionException;
import org.databene.commons.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 {
protected T nullResult;
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);
}
}