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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 com.feilong.lib.beanutils;
import org.apache.commons.beanutils.DynaBean;
/**
*
* Decorates a {@link DynaBean} to provide Map behavior.
*
*
*
* The motivation for this implementation is to provide access to {@link DynaBean}
* properties in technologies that are unaware of BeanUtils and {@link DynaBean}s -
* such as the expression languages of JSTL and JSF.
*
*
*
* This can be achieved either by wrapping the {@link DynaBean} prior to
* providing it to the technology to process or by providing a Map
* accessor method on the DynaBean implementation:
*
*
*
* public Map<String, Object> getMap() {
* return new DynaBeanPropertyMapDecorator(this);
* }
*
*
*
*
*
* This, for example, could be used in JSTL in the following way to access
* a DynaBean's fooProperty:
*
* ${myDynaBean.map.fooProperty}
*
*
* Usage
*
*
* To decorate a {@link DynaBean} simply instantiate this class with the
* target {@link DynaBean}:
*
*
*
* Map<String, Object> fooMap = new DynaBeanPropertyMapDecorator(fooDynaBean);
*
*
* The above example creates a read only Map.
* To create a Map which can be modified, construct a
* DynaBeanPropertyMapDecorator with the read only
* attribute set to false:
*
*
*
* Map<String, Object> fooMap =
* new DynaBeanPropertyMapDecorator(fooDynaBean, false);
*
* Limitations
*
* In this implementation the entrySet(), keySet()
* and values() methods create an unmodifiable
* Set and it does not support the Map's clear()
* and remove() operations.
*
*
* @since BeanUtils 1.9.0
* @version $Id$
*/
public class DynaBeanPropertyMapDecorator extends BaseDynaBeanMapDecorator{
/**
* Construct a Map for the specified {@link DynaBean}.
*
* @param dynaBean
* The dyna bean being decorated
* @param readOnly
* true if the Map is read only
* otherwise false
* @throws IllegalArgumentException
* if the {@link DynaBean} is null.
*/
public DynaBeanPropertyMapDecorator(final DynaBean dynaBean, final boolean readOnly){
super(dynaBean, readOnly);
}
/**
* Constructs a read only Map for the specified
* {@link DynaBean}.
*
* @param dynaBean
* The dyna bean being decorated
* @throws IllegalArgumentException
* if the {@link DynaBean} is null.
*/
public DynaBeanPropertyMapDecorator(final DynaBean dynaBean){
super(dynaBean);
}
@Override
protected String convertKey(final String propertyName){
return propertyName;
}
}