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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;
/**
* Accesses object graphs by splitting a path names into tokens by a dot separator('.').
* Created: 12.06.2007 18:29:19
* @author Volker Bergmann
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
public class GraphAccessor implements Accessor {
private Accessor realAccessor;
public GraphAccessor(String path) {
int separatorIndex = path.lastIndexOf('.');
if (separatorIndex < 0)
realAccessor = new FeatureAccessor(path);
else {
realAccessor = new FetchingAccessor(
new GraphAccessor(path.substring(0, separatorIndex)),
new FeatureAccessor(path.substring(separatorIndex + 1))
);
}
}
// Accessor interface implementation -------------------------------------------------------------------------------
@Override
public Object getValue(Object o) {
return realAccessor.getValue(o);
}
// java.lang.Object overrides --------------------------------------------------------------------------------------
@Override
public String toString() {
return getClass().getSimpleName() + '[' + realAccessor + ']';
}
// static utility methods ------------------------------------------------------------------------------------------
public static Object getValue(String path, Object o) {
return new GraphAccessor(path).getValue(o);
}
}