com.jaspersoft.jasperserver.war.xmla.XMLUtils.java Source code

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Here is the source code for com.jaspersoft.jasperserver.war.xmla.XMLUtils.java

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/*
 * Copyright (C) 2005 - 2014 TIBCO Software Inc. All rights reserved.
 * http://www.jaspersoft.com.
 *
 * Unless you have purchased  a commercial license agreement from Jaspersoft,
 * the following license terms  apply:
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero 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 Affero  General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public  License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.jaspersoft.jasperserver.war.xmla;

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

import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;

import org.apache.commons.io.IOUtils;

/**
 * This file provides XSLT services to XMLAServletImpl 
 * @author udavidovich
 *
 */
public class XMLUtils {

    /**
     * This method will apply an XSLT transformation
     * @param source the source reader
     * @param result the target writter
     * @param style the stylesheet to be applied
     * @throws TransformerException
     */
    static void transform(Reader source, Writer result, String style) throws TransformerException {
        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = tFactory.newTransformer(new StreamSource(new StringReader(style)));
        transformer.transform(new StreamSource(source), new StreamResult(result));
    }

    /**
     * read a file from classpath into a string
     * @param uri the path to the file (e.g. com/jaspersoft/foo/bar.xsl)
     * @return the content of the file
     * @throws IOException
     */
    static String loadStyle(String uri) throws IOException {
        InputStream xslt = XMLUtils.class.getClassLoader().getResourceAsStream(uri);

        StringWriter xsltwriter = new StringWriter();
        IOUtils.copy(xslt, xsltwriter);

        return xsltwriter.toString();
    }
}