Metacat

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

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

/**

 *  '$RCSfile$'

 *    Purpose: A class that gets Accession Number, check for uniqueness

 *             and register it into db

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

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Jivka Bojilova, Matt Jones

 *

 *   '$Author: tao $'

 *     '$Date: 2013-04-19 17:47:14 -0700 (Fri, 19 Apr 2013) $'

 * '$Revision: 7595 $'

 *

 * 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.common.query;

import java.io.ByteArrayInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.StringWriter;

import java.io.Writer;

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

import org.apache.solr.client.solrj.response.QueryResponse;

import org.apache.solr.common.params.SolrParams;

import org.apache.solr.core.SolrCore;

import org.apache.solr.request.LocalSolrQueryRequest;

import org.apache.solr.response.QueryResponseWriter;

import org.apache.solr.response.SolrQueryResponse;

/**

 * Transform the solr QueryReponse to the InputStream. Currently it works only for

 * The EmbeddedSolrServer.

 * @author tao

 *

 */

public class SolrQueryResponseTransformer {

    private SolrCore core = null;

    /**

     * Constructor

     * @param core

     */

    public SolrQueryResponseTransformer(SolrCore core) {

        this.core = core;

    }

    /**

     * Transform the query response the the inputstream.

     * @param request

     * @param response

     * @param wt

     * @return

     * @throws SolrServerException

     * @throws IOException

     */

    public InputStream transformResults(SolrParams request, QueryResponse response, String wt) throws SolrServerException, IOException {

        //InputStream stream = null;

        QueryResponseWriter writer = SolrQueryResponseWriterFactory.generateResponseWriter(wt);

        Writer results = new StringWriter();

        SolrQueryResponse sResponse = new SolrQueryResponse();

        sResponse.setAllValues(response.getResponse());

        writer.write(results, new LocalSolrQueryRequest(core, request), sResponse);

        return new ByteArrayInputStream(results.toString().getBytes("UTF-8"));

    }

}

/**

 *  '$RCSfile$'

 *    Purpose: A class that gets Accession Number, check for uniqueness

 *             and register it into db

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

 *             National Center for Ecological Analysis and Synthesis

 *    Authors: Jivka Bojilova, Matt Jones

 *

 *   '$Author: tao $'

 *     '$Date: 2013-04-19 17:47:14 -0700 (Fri, 19 Apr 2013) $'

 * '$Revision: 7595 $'

 *

 * 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.common.query;

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

import org.apache.solr.response.CSVResponseWriter;

import org.apache.solr.response.JSONResponseWriter;

import org.apache.solr.response.PHPResponseWriter;

import org.apache.solr.response.PHPSerializedResponseWriter;

import org.apache.solr.response.PythonResponseWriter;

import org.apache.solr.response.QueryResponseWriter;

import org.apache.solr.response.RubyResponseWriter;

import org.apache.solr.response.VelocityResponseWriter;

import org.apache.solr.response.XMLResponseWriter;

/**

 * Generate a QueryResponseWriter base on the specified format.

 * @author tao

 *

 */

public class SolrQueryResponseWriterFactory {

    public static final String XML = "xml";

    public static final String JSON = "json";

    public static final String PYTHON = "python";

    public static final String RUBY = "ruby";

    public static final String PHP = "php";

    public static final String PHPS = "phps";

    public static final String VELOCITY = "velocity";

    public static final String CSV ="csv";

   /** Create a QueryReponseWriter based on the specified wt format.    

     * Here is the list of the handler class to handle different format.

     * <queryResponseWriter name="xml" default="true" class="solr.XMLResponseWriter" />

     * <queryResponseWriter name="json" class="solr.JSONResponseWriter"/>

     * <queryResponseWriter name="python" class="solr.PythonResponseWriter"/>

     * <queryResponseWriter name="ruby" class="solr.RubyResponseWriter"/>

     * <queryResponseWriter name="php" class="solr.PHPResponseWriter"/>

     * <queryResponseWriter name="phps" class="solr.PHPSerializedResponseWriter"/>

     * <queryResponseWriter name="velocity" class="solr.VelocityResponseWriter"/>

     * <queryResponseWriter name="csv" class="solr.CSVResponseWriter"/>

     */

    public static QueryResponseWriter generateResponseWriter(String wt) throws SolrServerException {

        QueryResponseWriter writer = null;

        if(wt == null || wt.trim().equals("") || wt.equals(XML)) {

            writer = new XMLResponseWriter();

        } else if(wt.equals(JSON)) {

            writer = new JSONResponseWriter();

        } else if(wt.equals(PYTHON)) {

            writer = new PythonResponseWriter();

        } else if(wt.equals(RUBY)) {

            writer = new RubyResponseWriter();

        } else if(wt.equals(PHP)) {

            writer = new PHPResponseWriter();

        } else if(wt.equals(PHPS)) {

            writer = new PHPSerializedResponseWriter();

        } else if(wt.equals(VELOCITY)) {

            writer = new VelocityResponseWriter();

        } else if(wt.equals(CSV)) {

            writer = new CSVResponseWriter();

        } else {

            throw new SolrServerException("Metacat doesn't support this response format "+wt);

        }

        return writer;

    }

}