org.pentaho.pac.server.biplatformproxy.xmlserializer.SolutionRepositoryXmlSerializer.java Source code

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Here is the source code for org.pentaho.pac.server.biplatformproxy.xmlserializer.SolutionRepositoryXmlSerializer.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * 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 Lesser General Public License for more details.
 *
 * Copyright 2008 - 2009 Pentaho Corporation.  All rights reserved.
*/
package org.pentaho.pac.server.biplatformproxy.xmlserializer;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.pac.common.SolutionRepositoryServiceException;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class SolutionRepositoryXmlSerializer {

    private static final Log logger = LogFactory.getLog(SolutionRepositoryXmlSerializer.class);

    public SolutionRepositoryXmlSerializer() {

    }

    public void detectSubscriptionRepositoryErrorInXml(String strXml) throws SolutionRepositoryServiceException {

        SolutionRepositoryErrorParserHandler errorHandler;
        try {
            errorHandler = parseSchedulerExceptionXml(strXml);
        } catch (SAXException e) {
            logger.error(e.getMessage());
            throw new SolutionRepositoryServiceException(e.getMessage());
        } catch (IOException e) {
            logger.error(e.getMessage());
            throw new SolutionRepositoryServiceException(e.getMessage());
        } catch (ParserConfigurationException e) {
            logger.error(e.getMessage());
            throw new SolutionRepositoryServiceException(e.getMessage());
        }
        if (null != errorHandler.errorMessage) {
            throw new SolutionRepositoryServiceException(errorHandler.errorMessage);
        }
    }

    /**
     * 
     * @param strXml
     * @return
     * @throws SAXException
     * @throws IOException
     * @throws ParserConfigurationException
     */
    private SolutionRepositoryErrorParserHandler parseSchedulerExceptionXml(String strXml)
            throws SAXException, IOException, ParserConfigurationException {
        SAXParser parser = XmlSerializerUtil.getSAXParserFactory().newSAXParser();
        SolutionRepositoryErrorParserHandler h = new SolutionRepositoryErrorParserHandler();
        // TODO sbarkdull, need to set encoding
        //      String encoding = CleanXmlHelper.getEncoding( strXml );
        //      InputStream is = new ByteArrayInputStream( strXml.getBytes( encoding ) );
        InputStream is = new ByteArrayInputStream(strXml.getBytes("UTF-8")); //$NON-NLS-1$

        parser.parse(is, h);
        return h;
    }

    /**
     * potential error msg:
     * <web-service>
     *   <error
     *     msg="SolutionRepositoryService.ERROR_0001 - Failed to complete request to SolutionRepositoryWebService." />
     * </web-service>
     */
    private static class SolutionRepositoryErrorParserHandler extends DefaultHandler {

        public String errorMessage = null;
        private boolean isWebService = false;

        public SolutionRepositoryErrorParserHandler() {
        }

        public void characters(char[] ch, int startIdx, int length) {
            // no-op
        }

        public void endElement(String uri, String localName, String qName) throws SAXException {
            if (qName.equals("web-service")) { //$NON-NLS-1$
                isWebService = false;
            }
        }

        public void startElement(String uri, String localName, String qName, Attributes attributes)
                throws SAXException {
            if (qName.equals("web-service")) { //$NON-NLS-1$
                isWebService = true;
            } else if (qName.equals("error")) { //$NON-NLS-1$
                if (isWebService) {
                    errorMessage = attributes.getValue("msg");//$NON-NLS-1$
                }
            }
        }
    }
}