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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; } }




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