Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

*

* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

*

* 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.

*

* For more information, contact:

*

*  Generalitat Valenciana

*   Conselleria d'Infraestructures i Transport

*   Av. Blasco Ib??ez, 50

*   46010 VALENCIA

*   SPAIN

*

*      +34 963862235

*   gvsig@gva.es

*      www.gvsig.gva.es

*

*    or

*

*   IVER T.I. S.A

*   Salamanca 50

*   46005 Valencia

*   Spain

*

*   +34 963163400

*   dac@iver.es

*/

package es.gva.cit.catalogClient.languages;

import java.util.Iterator;

import java.util.StringTokenizer;

/**

 * This class is used to create a Common Query Language query.

 * See the specification for more information.

 * 

 * 

 * @author Jorge Piera Llodra (piera_jor@gva.es)

 * @see http://www.loc.gov/z3950/agency/zing/cql/

 */

public class CommonQueryLanguage extends AbstractGeneralLanguage {

/**

 * 

 * 

 * 

 * @param parameter 

 * @param line 

 * @param concordancia 

 */

    public void addClauses(String parameter, String line, String concordancia,String operator) {        

        currentClause = null;

        Iterator values = parseValues(line, concordancia);

        addClauses(parameter, values, concordancia,operator);

    } 

/**

 * 

 * 

 * 

 * @param parameter 

 * @param values 

 * @param concordancia 

 */

    public void addClauses(String parameter, Iterator values, String concordancia, String operator) {        

        while (values.hasNext())

            addTerm(parameter, (String) values.next(), concordancia);

        addCurrentClauseQuery(operator);

    } 

/**

 * It adds a new search field to the string

 * 

 * 

 * @param parameter 

 * @param value 

 * @param concordancia 

 */

    private void addTerm(String parameter, String value, String concordancia) {        

        StringBuffer term = new StringBuffer();

        term.append(parameter + "=" + cutWord(value, concordancia));

        if (currentClause == null) {

            currentClause = term.toString();

        } else {

            currentClause = "(" + currentClause + " " +

                getOperator(concordancia) + " " + term.toString() + ")";

        }          

    } 

/**

 * 

 * 

 */

    protected void addCurrentClauseQuery(String operator) {        

        if (currentClause != null) {

            if (currentQuery == null) {

                currentQuery = currentClause;

            } else {

                currentQuery = "(" + currentQuery + " " +

                operator  + " " + currentClause + ")";

            }

        }

    } 

/**

 * 

 * 

 * 

 * @return 

 */

    public String toString() {        

        return currentQuery;

    } 

/**

 * 

 * 

 * 

 * @return 

 * @param line 

 * @param titleKeys 

 */

    public String cutWord(String line, String titleKeys) {        

        if (titleKeys.equals("E")) {

            StringTokenizer sti = new StringTokenizer(line, " ", true);

            boolean first = true;

            String token = "";

            while (sti.hasMoreTokens()) {

                String currentToken = sti.nextToken();

                if (first) {

                    token = currentToken;

                    first = !first;

                } else if (!(currentToken.equals(" "))) {

                    token = "(" + token + " and " + currentToken + ")";

                }

            }

            return token;

        }

        return line;

    } 

 }