org.jdal.beans.CustomBeanDefinitionParser.java Source code

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Here is the source code for org.jdal.beans.CustomBeanDefinitionParser.java

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/*
 * Copyright 2009-2014 Jose Luis Martin.
 *
 * 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.jdal.beans;

import java.util.List;

import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser;
import org.springframework.beans.factory.xml.BeanDefinitionParser;
import org.springframework.beans.factory.xml.BeanDefinitionParserDelegate;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.beans.factory.xml.XmlReaderContext;
import org.springframework.util.xml.DomUtils;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

/**
 * {@link BeanDefinitionParser} for extending bean elements.
 * 
 * @author Jose Luis Martin
 * @since 2.1
 */
public class CustomBeanDefinitionParser extends AbstractSingleBeanDefinitionParser {

    private Class<?> beanClass;
    private String beanName;

    public CustomBeanDefinitionParser(Class<?> beanClass) {
        this.beanClass = beanClass;
    }

    @Override
    protected Class<?> getBeanClass(Element element) {
        return beanClass;
    }

    @Override
    protected String getBeanClassName(Element element) {
        if (beanClass != null)
            return beanClass.getName();

        return null;
    }

    /**
     * Parse a list element
     * @param element parent element
     * @param parserContext parse context
     * @param builder bean definition builder.
     * @param name the child list name.
     */
    protected void parseList(Element element, ParserContext parserContext, BeanDefinitionBuilder builder,
            String name) {

        NodeList nl = element.getElementsByTagNameNS(element.getNamespaceURI(), name);

        if (nl.getLength() > 0) {
            Element e = (Element) nl.item(0);
            List<Object> actionList = parserContext.getDelegate().parseListElement(e,
                    builder.getRawBeanDefinition());
            builder.addPropertyValue(name, actionList);
        }
    }

    /**
     * Parse bean like a real bean definition.
     * @param ele element
     * @param parserContext parserContext
     * @param builder builder
     */
    protected void parseBeanDefinition(Element ele, ParserContext parserContext, BeanDefinitionBuilder builder) {
        BeanDefinitionParserDelegate delegate = parserContext.getDelegate();
        AbstractBeanDefinition bd = builder.getRawBeanDefinition();
        XmlReaderContext reader = parserContext.getReaderContext();

        try {
            delegate.parseBeanDefinitionAttributes(ele, beanName, null, bd);
            bd.setDescription(DomUtils.getChildElementValueByTagName(ele, "description"));

            delegate.parseMetaElements(ele, bd);
            delegate.parseLookupOverrideSubElements(ele, bd.getMethodOverrides());
            delegate.parseReplacedMethodSubElements(ele, bd.getMethodOverrides());

            delegate.parseConstructorArgElements(ele, bd);
            delegate.parsePropertyElements(ele, bd);
            delegate.parseQualifierElements(ele, bd);

        } catch (NoClassDefFoundError err) {
            reader.error("Class that bean class [" + this.beanClass + "] depends on not found", ele, err);
        } catch (Throwable ex) {
            reader.error("Unexpected failure during bean definition parsing", ele, ex);
        }

    }

    @Override
    protected String resolveId(Element element, AbstractBeanDefinition definition, ParserContext parserContext)
            throws BeanDefinitionStoreException {

        this.beanName = super.resolveId(element, definition, parserContext);

        return this.beanName;
    }
}