com.aurel.track.report.export.bl.XsltTransformer.java Source code

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Here is the source code for com.aurel.track.report.export.bl.XsltTransformer.java

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/**
 * Genji Scrum Tool and Issue Tracker
 * Copyright (C) 2015 Steinbeis GmbH & Co. KG Task Management Solutions
    
 * <a href="http://www.trackplus.com">Genji Scrum Tool</a>
 *
 * 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/>.
 */

/* $Id:$ */

package com.aurel.track.report.export.bl;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.commons.lang3.exception.ExceptionUtils;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.LogManager;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;

/**
 * An util class that transform an xml to another xml using xslt
 */
public class XsltTransformer {
    static Logger LOGGER = LogManager.getLogger(XsltTransformer.class);

    public static XsltTransformer instance;

    public static XsltTransformer getInstance() {
        if (instance == null) {
            instance = new XsltTransformer();
        }
        return instance;
    }

    public XsltTransformer() {
    }

    public Document transform(Document dom, String xsltPath) {
        Document domResult = null;
        try {
            TransformerFactory tFactory = TransformerFactory.newInstance();
            File stylesheet = new File(xsltPath);
            StreamSource stylesource = new StreamSource(stylesheet);
            Transformer transformer = tFactory.newTransformer(stylesource);
            DOMSource source = new DOMSource(dom);
            ByteArrayOutputStream result = new ByteArrayOutputStream();
            StreamResult sr = new StreamResult(result);
            transformer.transform(source, sr);
            LOGGER.debug("--------------------");
            LOGGER.debug(result.toString());
            LOGGER.debug("--------------------");
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            try {
                DocumentBuilder builder = factory.newDocumentBuilder();
                domResult = builder.parse(new InputSource(new ByteArrayInputStream(result.toByteArray())));
            } catch (Exception e) {
                LOGGER.error(ExceptionUtils.getStackTrace(e));
            }
        } catch (TransformerConfigurationException tce) {
            LOGGER.error("Can't transform dom using xslt path :" + xsltPath, tce);
        } catch (TransformerException te) {
            LOGGER.error("Can't transform dom using xslt path :" + xsltPath, te);
        }
        return domResult;
    }

    public void transform(File source, File target, File stylesheet) {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        Document dom = null;
        try {
            DocumentBuilder builder = factory.newDocumentBuilder();
            dom = builder.parse(source);
        } catch (Exception e) {
            LOGGER.error(ExceptionUtils.getStackTrace(e));
        }
        try {
            TransformerFactory tFactory = TransformerFactory.newInstance();
            StreamSource stylesource = new StreamSource(stylesheet);
            Transformer transformer = tFactory.newTransformer(stylesource);
            StreamResult result = new StreamResult(new FileOutputStream(target));
            DOMSource domsource = new DOMSource(dom);
            transformer.transform(domsource, result);
        } catch (TransformerConfigurationException tce) {
            LOGGER.error(ExceptionUtils.getStackTrace(tce));
        } catch (TransformerException te) {
            LOGGER.error(ExceptionUtils.getStackTrace(te));
        } catch (FileNotFoundException e) {
            LOGGER.error(ExceptionUtils.getStackTrace(e));
        }
    }
}