org.craftercms.cstudio.alfresco.util.XmlUtils.java Source code

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Here is the source code for org.craftercms.cstudio.alfresco.util.XmlUtils.java

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/*******************************************************************************
 * Crafter Studio Web-content authoring solution
 *     Copyright (C) 2007-2013 Crafter Software Corporation.
 * 
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * 
 *     This program 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 General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package org.craftercms.cstudio.alfresco.util;

import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.io.StringWriter;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * This class provides common methods for handling XML
 * 
 * @author hyanghee
 * 
 */
public class XmlUtils {

    private static final Logger LOGGER = LoggerFactory.getLogger(XmlUtils.class);

    /**
     * load XML from the given input stream
     * 
     * @param in
     * @return Document
     * @throws DocumentException
     */
    public static Document loadXml(InputStream in) throws DocumentException {
        SAXReader reader = new SAXReader();
        Document document = reader.read(in);
        return document;
    }

    /**
     * convert document to string
     * 
     * @param document
     * @return XML as String
     * @throws IOException
     */
    public static String convertDocumentToString(Document document) throws IOException {
        StringWriter sw = new StringWriter();
        XMLWriter writer = new XMLWriter(sw);
        try {
            writer.write(document);
            writer.flush();
            return sw.toString();
        } finally {
            sw.close();
            writer.close();
        }
    }

    /**
     * convert xml string to document
     * 
     * @param xmlString
     * @return document
     */
    public static org.w3c.dom.Document convertStringToW3cDocument(String xmlString) {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        StringReader reader = null;
        try {
            DocumentBuilder builder = factory.newDocumentBuilder();
            reader = new StringReader(xmlString);
            org.w3c.dom.Document document = builder.parse(new InputSource(reader));
            reader.close();
            return document;
        } catch (ParserConfigurationException e) {
            LOGGER.error("failed to parse string to document: " + xmlString, e);
        } catch (SAXException e) {
            LOGGER.error("failed to parse string to document: " + xmlString, e);
        } catch (IOException e) {
            LOGGER.error("failed to parse string to document: " + xmlString, e);
        } finally {
            reader.close();
        }
        return null;
    }

}