Application: gvSIG desktop

/**********************************************************************

 * $Id: OGRSFDriverRegistrar.java 945 2005-01-12 18:05:23Z igbrotru $

 *

 * Name:     OGRSFDriverRegistrar.java

 * Project:  JGDAL. Interface java to gdal (Frank Warmerdam).

 * Purpose:   

 * Author:   Nacho Brodin, brodin_ign@gva.es

 *

 **********************************************************************/

/*Copyright (C) 2004  Nacho Brodin <brodin_ign@gva.es>

 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 es.gva.cit.jogr;

/** 

 * Gestor de drivers

 * 

 * @author Nacho Brodin <brodin_ign@gva.es>.<BR> Equipo de desarrollo gvSIG.<BR> http://www.gvsig.gva.es

 * @version 0.0

 * @link http://www.gvsig.gva.es

 */

public class OGRSFDriverRegistrar extends JNIBase{

        private long driver;

        public native long openNat(String fte, int bUpdate);

        public native long getRegistrarNat();

        public native long getDriverNat(long cPtr, int i);

        private native void FreeOGRSFDriverRegistrarNat(long cPtr);

        /**

         * Abre un fichero de im?gen

         * @throws OGRException

         * @param fte        fichero fuente

         * @param bUpdate

         * @param pdriver

         * @return OGRDataSource

         */

        public OGRDataSource open(String fte, boolean bUpdate, OGRSFDriver pdriver)throws OGRException{

                OGRDataSource ds;

                OGRSFDriver drv;

                driver=-1;

                int bU=0;

                if(bUpdate)bU=1;

                long res = openNat(fte, bU);

                if(res<=0 || driver<=0)

                        throw new OGRException("Error en open(). No se ha podido abrir la im?gen.");

                else{

                        ds = new OGRDataSource(res);

                        drv = new OGRSFDriver(driver);

                }

                pdriver=drv;                

                return ds;

        }

        /**

         * Obtiene el n?mero de drivers registrados en el gestor

         * @throws OGRException

         * @return N?mero de drivers

         */

         public int getDriverCount()throws OGRException{

                 if(cPtr<=0)cPtr=getRegistrarNat();

                String msg1="Error en getDriverCount. . La llamada getRegistrar de OGR no tuvo exito";

                String msg2="Error en la cuenta de drivers";

                return baseSimpleFunctions(0,msg1,msg2);

         }

         /**

         * Obtiene el driver indicado por el ?ndice

         * @throws OGRException

         * @return un driver

         */

         public OGRSFDriver getDriver(int i)throws OGRException{

                 if(cPtr<=0)cPtr=getRegistrarNat();

                 if(cPtr <= 0)

                        throw new OGRException("Error en getDriver(). La llamada getRegistrar() no tuvo exito");

                long drv = getDriverNat(cPtr, i);

                if(drv<=0)

                        throw new OGRException("Error en getDriver(). No se ha podido obtener el driver indicado.");

                return new OGRSFDriver(drv);

         }

        /**

        * Destructor 

        */

        protected void finalize(){

                if(cPtr > 0)

                        FreeOGRSFDriverRegistrarNat(cPtr);

        }

}