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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.accessor;
import org.databene.commons.Accessor;
/**
* Evaluates a boolean 'condition' accessor and, depending on the result, calls one of two other accessors.
* Created: 28.02.2013 16:17:04
* @param the object type to access
* @param the type of the value to get from the object
* @since 0.5.21
* @author Volker Bergmann
*/
public class ConditionalAccessor implements Accessor {
private Accessor condition;
private Accessor trueAccessor;
private Accessor falseAccessor;
public ConditionalAccessor(Accessor condition,
Accessor trueAccessor, Accessor falseAccessor) {
this.condition = condition;
this.trueAccessor = trueAccessor;
this.falseAccessor = falseAccessor;
}
@Override
public V getValue(C target) {
if (condition.getValue(target))
return trueAccessor.getValue(target);
else
return falseAccessor.getValue(target);
}
}