Metacat

/**

 *  '$RCSfile$'

 *  Copyright: 2000-2011 Regents of the University of California and the

 *              National Center for Ecological Analysis and Synthesis

 *

 *   '$Author: leinfelder $'

 *     '$Date: 2012-11-29 16:52:29 -0800 (Thu, 29 Nov 2012) $'

 *

 * 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 2 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package edu.ucsb.nceas.metacat.index;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.util.Hashtable;

import org.apache.commons.logging.LogFactory;

import org.apache.solr.client.solrj.SolrServerException;

import org.dataone.service.exceptions.NotImplemented;

import org.dataone.service.exceptions.UnsupportedType;

import edu.ucsb.nceas.metacat.common.query.SolrQueryServiceController;

/**

 * This class will query the solr server and return the result.

 * @author tao

 *

 */

public class MetacatSolrIndex {

    //public static final String SOLR_HOME_PROPERTY_NAME = "solr.homeDir";

    //public static final String SOLR_CONFIG_FILE_NAME_PROPERTY_NAME = "solr.configFileName";

    //public static final String SOLR_COLLECTION_NAME_PROPERTY_NAME = "solr.collectionName";

    //public static final String SOLR_SERVER_CLASSNAME_PROPERTY_NAME = "solr.server.classname";

            solrIndex = new MetacatSolrIndex();

        }

        return solrIndex;

    }

     * Constructor

     * @throws IOException

     * @throws ParserConfigurationException

     * Query the solr server

     * @param query  the solr query

     * @throws SolrServerException

     * @throws SQLException

     * @throws PropertyNotFoundException

     * @throws ParserConfigurationException

     * @throws NotFound

     * @throws NotImplemented

    ClassNotFoundException, ParserConfigurationException, SAXException, NotImplemented, NotFound, UnsupportedType {

            throw new SolrServerException("MetacatSolrIndex.query - There is no any authorized subjects(even the public user) in this query session.");

        }

        SolrParams solrParams = SolrRequestParsers.parseQueryString(query);

            // just handle as normal solr query

        else {

            String qformat = wt;

            // perform the solr query using wt=XML

            wt = SolrQueryResponseWriterFactory.XML;

            ModifiableSolrParams msp = new ModifiableSolrParams(solrParams);

            msp.set(SolrQueryService.WT, wt);

            // apply the stylesheet (XML->HTML)

            DBTransform transformer = new DBTransform();

            String documentContent = IOUtils.toString(inputStream, "UTF-8");

            String sourceType = "solr";

            String targetType = "-//W3C//HTML//EN";

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            Writer writer = new OutputStreamWriter(baos , "UTF-8");

            // TODO: include more params?

            Hashtable<String, String[]> params = new Hashtable<String, String[]>();

            params.put("qformat", new String[] {qformat});

            transformer.transformXMLDocument(

                    documentContent ,

                    sourceType,

                    targetType ,

                    qformat,

                    writer,

                    params,

                    null //sessionid

                    );

            // finally, get the HTML back

            ((ContentTypeByteArrayInputStream) inputStream).setContentType("text/html");