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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.bean;
import org.databene.commons.BeanUtil;
import org.databene.commons.StringUtil;
import org.databene.commons.accessor.TypedAccessor;
import org.databene.commons.accessor.TypedAccessorChain;
/**
* Accesses JavaBean object graphs.
* Created: 21.07.2007 10:18:17
* @author Volker Bergmann
*/
@SuppressWarnings("rawtypes")
public class PropertyGraphAccessor extends TypedAccessorChain implements PropertyAccessor {
private String propertyName;
public PropertyGraphAccessor(Class beanClass, String propertyName, boolean strict) {
super(createSubAccessors(beanClass, propertyName, strict));
this.propertyName = propertyName;
}
@Override
public String getPropertyName() {
return propertyName;
}
// static utility methods ------------------------------------------------------------------------------------------
public static Object getPropertyGraph(String path, Object bean) {
String[] tokens = StringUtil.splitOnFirstSeparator(path, '.');
Object tmp = BeanUtil.getPropertyValue(bean, tokens[0]);
if (tokens[1] != null && tmp != null)
return getPropertyGraph(tokens[1], tmp);
else
return tmp;
}
private static TypedAccessor[] createSubAccessors(Class beanClass, String propertyName, boolean strict) {
String[] nodeNames = StringUtil.tokenize(propertyName, '.');
PropertyAccessor[] nodes = new PropertyAccessor[nodeNames.length];
Class intermediateClass = beanClass;
for (int i = 0; i < nodeNames.length; i++) {
PropertyAccessor node = PropertyAccessorFactory.getAccessor(intermediateClass, nodeNames[i], strict);
nodes[i] = node;
if (intermediateClass != null)
intermediateClass = node.getValueType();
}
return nodes;
}
}