abstractuicomponentbeandefinitiondecorator.java

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/*
 * Copyright 2002-2004 the original author or authors.
 * 
 * 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 de.mindmatters.faces.spring.factory.aspectj;

import org.springframework.beans.PropertyValue;
import org.springframework.beans.factory.config.BeanDefinitionHolder;
import org.springframework.beans.factory.support.ManagedList;
import org.springframework.beans.factory.xml.BeanDefinitionDecorator;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.Assert;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

/**
 * {@link org.springframework.beans.factory.xml.BeanDefinitionDecorator}
 * implementation for parsing JSF component tags and creating the appropriate
 * {@link UIComponentDefinition} definitions.
 * 
 * @author Andreas Kuhrwahl
 * 
 */
abstract class AbstractUIComponentBeanDefinitionDecorator implements
        BeanDefinitionDecorator {

    /**
     * {@inheritDoc}
     */
    public BeanDefinitionHolder decorate(final Node node,
            final BeanDefinitionHolder definition,
            final ParserContext parserContext) {
        Assert.isInstanceOf(Element.class, node);
        Element componentElement = (Element) node;
        PropertyValue children = definition.getBeanDefinition()
                .getPropertyValues().getPropertyValue("children");
        if (children == null) {
            ManagedList chidrenList = new ManagedList();
            chidrenList.setMergeEnabled(true);
            chidrenList
                    .setSource(parserContext.extractSource(componentElement));
            children = new PropertyValue("children", chidrenList);
            children.setSource(parserContext.extractSource(componentElement));
            definition.getBeanDefinition().getPropertyValues()
                    .addPropertyValue(children);
        }
        decorateInternal(componentElement, definition, (ManagedList) children
                .getValue(), parserContext);
        return definition;
    }

    /**
     * Parse the specified {@link Element} and decorate the supplied
     * {@link org.springframework.beans.factory.config.BeanDefinition},
     * returning the decorated definition.
     * 
     * @param componentElement
     *            the {@link Element}
     * @param definition
     *            the {@link BeanDefinitionDecorator}
     * @param list
     *            the {@link ManagedList}
     * @param parserContext
     *            the {@link ParserContext}
     */
    protected abstract void decorateInternal(Element componentElement,
            BeanDefinitionHolder definition, ManagedList list,
            ParserContext parserContext);

}