org.jboss.spring.factory.NamedXmlBeanDefinitionParser Maven / Gradle / Ivy

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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.spring.factory;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jboss.util.naming.Util;
import org.jboss.logging.Logger;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.beans.factory.xml.BeanDefinitionParserDelegate;
import org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * Named bean definition parser.
 *
 * @author Ales Justin
 */
public class NamedXmlBeanDefinitionParser extends DefaultBeanDefinitionDocumentReader implements Nameable, Instantiable {

    protected static Logger log = Logger.getLogger(NamedXmlBeanDefinitionParser.class);

    public static final String BEAN_FACTORY_ELEMENT = "BeanFactory=\\(([^)]+)\\)";

    public static final String PARENT_BEAN_FACTORY_ELEMENT = "ParentBeanFactory=\\(([^)]+)\\)";

    public static final String INSTANTIATION_ELEMENT = "Instantiate=\\(([^)]+)\\)";

    private ConfigurableBeanFactory beanFactory;

    private String beanFactoryName;

    private boolean instantiate;

    public NamedXmlBeanDefinitionParser(ConfigurableBeanFactory beanFactory) {
        this.beanFactory = beanFactory;
    }

    protected void preProcessXml(Element root) throws BeanDefinitionStoreException {
        NodeList nl = root.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node node = nl.item(i);
            if (node instanceof Element) {
                Element ele = (Element) node;
                if (BeanDefinitionParserDelegate.DESCRIPTION_ELEMENT.equals(node.getNodeName())) {
                    String nodeValue = ele.getFirstChild().getNodeValue();
                    if (log.isTraceEnabled()) {
                        log.trace("Bean names [description tag]: " + nodeValue);
                    }
                    Matcher bfm = parse(nodeValue, BEAN_FACTORY_ELEMENT);
                    if (bfm.find()) {
                        beanFactoryName = bfm.group(1);
                    }
                    Matcher pbfm = parse(nodeValue, PARENT_BEAN_FACTORY_ELEMENT);
                    if (pbfm.find()) {
                        String parentBeanFactoryName = pbfm.group(1);
                        try {
                            beanFactory.setParentBeanFactory((BeanFactory) Util.lookup(parentBeanFactoryName, BeanFactory.class));
                        } catch (Exception e) {
                            throw new BeanDefinitionStoreException("Failure during parent bean factory JNDI lookup: " + parentBeanFactoryName, e);
                        }
                    }
                    Matcher inst = parse(nodeValue, INSTANTIATION_ELEMENT);
                    if (inst.find()) {
                        instantiate = Boolean.parseBoolean(inst.group(1));
                    }
                }
            }
        }
    }

    public String getName() {
        return beanFactoryName;
    }

    public boolean doInstantiate() {
        return instantiate;
    }

    private static Matcher parse(String value, String regexp) {
        Pattern pattern = Pattern.compile(regexp);
        return pattern.matcher(value);
    }
}