com.love320.templateparser.util.ConfigBeanXML.java Source code

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Here is the source code for com.love320.templateparser.util.ConfigBeanXML.java

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/**
 * Copyright (c) 2010-2012 love320.com
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * Founder admin@love320.com
 */
package com.love320.templateparser.util;

import java.io.InputStream;
import java.util.Iterator;
import java.util.List;

import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @ClassName: ConfigBeanXML
 * @Description: TODO
 * @author love320.com
 * @date 2012-6-16 ?05:21:32 ??
 */
public class ConfigBeanXML {

    private final static Logger logger = LoggerFactory.getLogger(ConfigBeanXML.class);

    public static Element action(String config, String... paths) {
        Document document = null;
        document = getXML(FileUtil.getJar(config));//?

        // ?????
        if (paths != null) {
            for (String path : paths) {
                if (path != null) {
                    document = merger(document, getXML(FileUtil.get(path)));// ??
                }
            }
        }

        return document.getRootElement();
    }

    // ???,???
    private static Document merger(Document document, Document doc) {
        Iterator documentIter = selectNodes(document, "/beans");//
        if (documentIter.hasNext()) {//
            Element documentElement = (Element) documentIter.next();//?Element

            Iterator dociter = selectNodes(doc, "/beans/bean");//
            while (dociter.hasNext()) {//??
                Element docElement = (Element) dociter.next();//?Element
                deleteElement(document, docElement.attributeValue("id"));//
                documentElement.add(docElement.createCopy());//?,
            }
        }
        return document;
    }

    //?
    private static void deleteElement(Document document, String beanId) {
        Iterator documentIter = selectNodes(document, "/beans/bean[@id='" + beanId + "']");//
        while (documentIter.hasNext()) {
            Element element = (Element) documentIter.next();//?Element
            element.detach();//
        }
    }

    //???
    private static Iterator selectNodes(Document document, String xpath) {
        List documentList = document.selectNodes(xpath);//?beans
        Iterator documentIter = documentList.iterator();//
        return documentIter;
    }

    // ?xml
    private static Document getXML(InputStream is) {
        SAXReader sax = new SAXReader();
        Document document = null;
        try {
            document = sax.read(is);// ?
        } catch (DocumentException e) {
            logger.error("DocumentException", e);
        }
        return document;
    }
}