Application: gvSIG desktop

package com.iver.cit.gvsig.fmap.drivers.wfs.filters;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.util.Hashtable;

import org.gvsig.remoteClient.wfs.filters.FilterEncoding;

import org.gvsig.remoteClient.wfs.filters.ISQLExpressionFormat;

import Zql.ParseException;

import Zql.ZExp;

import Zql.ZExpression;

import Zql.ZqlParser;

/* 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

 */

/* CVS MESSAGES:

 *

 * $Id: SQLExpressionFormat.java 8273 2006-10-24 07:27:56Z jorpiell $

 * $Log$

 * Revision 1.4  2006-10-24 07:27:56  jorpiell

 * Algunos cambios en el modelo que usa la tabla

 *

 * Revision 1.3  2006/10/23 07:37:04  jorpiell

 * Ya funciona el filterEncoding

 *

 * Revision 1.2  2006/10/10 12:55:06  jorpiell

 * Se ha a?adido el soporte de features complejas

 *

 * Revision 1.1  2006/10/05 10:26:26  jorpiell

 * A?adidas las clases para obtener los filtros

 *

 *

 */

/**

 * @author Jorge Piera Llodr? (piera_jor@gva.es)

 */

public class SQLExpressionFormat implements ISQLExpressionFormat{

        /*

         *  (non-Javadoc)

         * @see org.gvsig.remoteClient.wfs.filters.ISQLExpressionFormat#format(java.lang.String)

         */

        public String format(String query) {

                if ((query == null) || (query.equals(""))){

                        return null;

                }

                InputStream is = new ByteArrayInputStream(query.getBytes());

                ZqlParser parser = new ZqlParser();

                parser.initParser(is);

                ZExp exp;

                try {

                        exp = parser.readExpression();

                        return exp.toString();

                } catch (ParseException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

                return query;

        }

        /**

         * Creates a Filter Encoding creator that uses this

         * formatter to parse the SQL

         * @return

         */

        public static FilterEncoding createFilter(){

                return new FilterEncoding(new SQLExpressionFormat());                                

        }

}