QueryBank.java

/**
 *  OpenKM, Open Document Management System (http://www.openkm.com)
 *  Copyright (c) 2006-2011  Paco Avila & Josep Llort
 *
 *  No bytes were intentionally harmed during the development of this application.
 *
 *  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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
package com.openkm.kea.tree;

import org.openrdf.query.MalformedQueryException;
import org.openrdf.query.QueryLanguage;
import org.openrdf.query.TupleQuery;
import org.openrdf.repository.RepositoryConnection;
import org.openrdf.repository.RepositoryException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.openkm.core.Config;

/**
 * QueryBank
 * 
 * @author jllort
 *
 */
public class QueryBank {
	
	private static Logger log = LoggerFactory.getLogger(QueryBank.class);

    private static QueryBank instance;

    /**
     * QueryBank
     */
    private QueryBank() { }

    /**
     * QueryBank
     * 
     * @return
     */
    public static synchronized QueryBank getInstance() {
        if (instance == null) {
            instance = new QueryBank();
        }
        return instance;
    }

    /**
     * getTreeTopQuery
     * 
     * @param con Repository connection
     * 
     * @return
     */
    public TupleQuery getTreeTopQuery(RepositoryConnection con) {
        try {

//        	query = "SELECT C, tipus FROM {C} rdfs:subClassOf {tipus} ";
//        	
//        	query = "SELECT C, tipus FROM {C} tipus {Z} "; // Treu totes les relacions
//        	
//        	// La consulta del miracle que treu els fills !!! l'invent de la comparacio esta en transformar-ho a string
//        	// en la comparació
//        	query = "SELECT C, tipus FROM {C} rdfs:subClassOf {tipus} where xsd:string(tipus) = \"http://www.fao.org/aos/agrovoc#c_50113\"";
//        	
//        	// Aquesta es la consulta que ens retorna els nodes que no tenen pare
//        	query = "SELECT C, tipus FROM {C} Y {tipus}; [rdfs:subClassOf {classe}] where not bound(classe) ";
        	
//        	String query = "SELECT DISTINCT UID, TEXT FROM {UID} Y {OBJECT}, {UID} rdfs:label {TEXT} ; "+
//        			"[rdfs:subClassOf {CLAZZ}] where not bound(CLAZZ) and lang(TEXT)=\"es\" "+
//        			"USING NAMESPACE " +
//        			"foaf=<http://xmlns.com/foaf/0.1/>, " +
//        			"dcterms=<http://purl.org/dc/terms/>, "+
//        			"rdf=<http://www.w3.org/1999/02/22-rdf-syntax-ns#>, " +
//        			"owl=<http://www.w3.org/2002/07/owl#>, " +
//        			"rdfs=<http://www.w3.org/2000/01/rdf-schema#>, " +
//        			"skos=<http://www.w3.org/2004/02/skos/core#>, " +
//        			"dc=<http://purl.org/dc/elements/1.1/> ";
//        	
//        	System.out.println(query);
            return con.prepareTupleQuery(QueryLanguage.SERQL, Config.KEA_THESAURUS_TREE_ROOT);
        } catch (RepositoryException e) {
            log.error("Error preparing tree top query",e);
        } catch (MalformedQueryException e) {
            log.error("malformed rMap query",e);
        }
        return null;
    }

    /**
     * getTreeNextLayerQuery
     * 
     * @param parentID The parent id
     * @param con The repository connection
     * 
     * @return
     */
    public TupleQuery getTreeNextLayerQuery(String RDFparentID, RepositoryConnection con) {
        try {
//        	String query = "SELECT DISTINCT UID, TEXT FROM {UID} rdfs:subClassOf {CLAZZ}, {UID} rdfs:label {TEXT} "+
//        	"where xsd:string(CLAZZ) = \"RDFparentID\" and lang(TEXT)=\"es\" "+
//			"USING NAMESPACE " +
//			"foaf=<http://xmlns.com/foaf/0.1/>, " +
//			"dcterms=<http://purl.org/dc/terms/>, "+
//			"rdf=<http://www.w3.org/1999/02/22-rdf-syntax-ns#>, " +
//			"owl=<http://www.w3.org/2002/07/owl#>, " +
//			"rdfs=<http://www.w3.org/2000/01/rdf-schema#>, " +
//			"skos=<http://www.w3.org/2004/02/skos/core#>, " +
//			"dc=<http://purl.org/dc/elements/1.1/> ";
//        	
//        	query = query.replace("RDFparentID", RDFparentID);
        	return con.prepareTupleQuery(QueryLanguage.SERQL, Config.KEA_THESAURUS_TREE_CHILDS.replace("RDFparentID", RDFparentID));
        } catch (RepositoryException e) {
            log.error("Error preparing rMap query",e);
        } catch (MalformedQueryException e) {
            log.error("malformed next tree layer query",e);
        }
        return null;
    }
}