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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;
/**
* Maps true, false and null to configured aliases, e.g. '1', '0' and '?'.
* By default booleans are converted to the strings 'true', 'false' and null.
* Created at 11.03.2009 19:40:33
* @param the object type to convert to
* @since 0.5.8
* @author Volker Bergmann
*/
public class BooleanMapper extends ThreadSafeConverter {
private T trueValue;
private T falseValue;
private T nullValue;
@SuppressWarnings("unchecked")
public BooleanMapper() {
this((T) "true", (T) "false", null);
}
@SuppressWarnings("unchecked")
public BooleanMapper(T trueValue, T falseValue, T nullValue) {
super(Boolean.class, (Class) trueValue.getClass());
this.trueValue = trueValue;
this.falseValue = falseValue;
this.nullValue = nullValue;
}
@Override
public T convert(Boolean sourceValue) throws ConversionException {
return (sourceValue != null ? (sourceValue ? trueValue : falseValue) : nullValue);
}
}