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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) 2004-2014 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;
/**
* Two step Accessor, that uses one Accessor to fetch an object and another one to read a value from it.
*
* Created: 12.06.2007 18:43:28
* @author Volker Bergmann
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public class FetchingAccessor implements Accessor {
private Accessor provider;
private Accessor accessor;
public FetchingAccessor(Accessor provider, Accessor accessor) {
this.provider = provider;
this.accessor = accessor;
}
@Override
public Object getValue(Object o) {
return accessor.getValue(provider.getValue(o));
}
@Override
public String toString() {
return getClass().getSimpleName() + "[accessor=" + accessor + ", provider=" + provider + "]";
}
}