Metacat

/**

 *  '$RCSfile$'

 *  Copyright: 2006 Regents of the University of California and the

 *             National Center for Ecological Analysis and Synthesis

 *

 *   '$Author$'

 *     '$Date$'

 * '$Revision$'

 *

 * 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;

import java.io.File;

import java.io.IOException;

import java.util.Hashtable;

import edu.ucsb.nceas.utilities.Options;

/**

 * Generate a pathquery document representing a metacat query for a list of 

 * document IDs.

 */

public class DocumentIdQuery

{

    /**

     * Create an squery using some preset values for the query parameters, only

     * passing in the document ids to be searched.

     * 

     * @param docidList an arrany of document identifiers to search for

     */

    public static String createDocidQuery(String[] docidList)

    {

        String pathQuery = "";

        Hashtable params = getDefaultQueryParams();

        if (docidList != null) {

            params.put("/eml/@packageId", docidList);

        }

        pathQuery = DBQuery.createSQuery(params);

        return pathQuery;

    }

    /**

     * Create a paramter list containing default parameters for a query

     * 

     * @return Hashtable containing the default parameters

     */

    public static Hashtable getDefaultQueryParams()

    {

        Hashtable params = new Hashtable();

        String[] operator = new String[1];

        operator[0] = "UNION";

        params.put("operator", operator);

        String[] doctypes = new String[4];

        doctypes[0] = "eml://ecoinformatics.org/eml-2.0.1";

        doctypes[1] = "eml://ecoinformatics.org/eml-2.0.0";

        doctypes[2] = "-//ecoinformatics.org//eml-dataset-2.0.0beta6//EN";

        doctypes[3] = "-//ecoinformatics.org//eml-dataset-2.0.0beta4//EN";

        params.put("returndoctype", doctypes);

        String[] fields = new String[8];

        fields[0]="originator/individualName/surName";

        fields[1]="originator/individualName/givenName";

        fields[2]="creator/individualName/surName";

        fields[3]="creator/individualName/givenName";

        fields[4]="originator/organizationName";

        fields[5]="creator/organizationName";

        fields[6]="dataset/title";

        fields[7]="keyword";

        params.put("returnfield", fields);

        return params;

    }

    /**

     * Main method used for testing the class output

     * 

     * @param args no arguments used in this main method

     */

    public static void main(String[] args)

    {

        String CONFIG_DIR = "lib";

        String CONFIG_NAME = "metacat.properties";

        File dirPath = new File(CONFIG_DIR);

        File propertyFile = new File(dirPath, CONFIG_NAME);

        Options options = null;

        try {

            options = Options.initialize(propertyFile);

        } catch (IOException ioe) {

            System.err.println("Error in loading options: "

                    + ioe.getMessage());

        }

        String[] ids = new String[3];

        ids[0] = "ces_dataset.23.1";

        ids[1] = "knb-lter-vcr.97.1";

        ids[2] = "obfs.400.1";

        String pathquery = createDocidQuery(ids);

        System.out.println(pathquery);

    }

}