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

 * $Id: JNIBase.java 837 2005-01-10 07:30:28Z igbrotru $

 *

 * Name:     JNIBase.java

 * Project:  JMRSID. Interfaz java to MrSID (Lizardtech).

 * Purpose:  Base class for classes that use JNI.

 * 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.

 */

/**

 * @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

 */

package es.gva.cit.jmrsid;

public class JNIBase{

        protected long cPtr;

        private native int getIndexCountNat(long cPtr);

        private native int initializeNat(long cPtr);

        private native int getNumLevelsNat(long cPtr);

        private native int getWidthNat(long cPtr);

        private native int getHeightNat(long cPtr);

        private native int getStripHeightNat(long cPtr);

        private native int getNumBandsNat(long cPtr);

        private native int getColorSpaceNat(long cPtr);

        private native int getDataTypeNat(long cPtr);

        /**

         * Funci?n que sirve como base para funcionalidades de mrsid que admiten como par?metro un entero y devuelven un entero.

         * 

         * @throws MrSIDException.

         * @param msg1        Mensaje de error que se muestra cuando el puntero a objeto pasado es vacio.

         * @param msg2        Mensaje de error que se muestra cuando el resultado de la llamada a la funci?n de gdal es menor o igual que 0.

         */

        protected int baseSimpleFunction(int n,String msg1,String msg2)throws MrSIDException{

                int res = 0;

                if(cPtr <= 0)

                         throw new MrSIDException(msg1);

                switch(n){

                        case 0: res = getIndexCountNat(cPtr);break;

                        case 1: res = initializeNat(cPtr);break;

                        case 2: res = getNumLevelsNat(cPtr);break;

                        case 3: res = getWidthNat(cPtr);break;

                        case 4: res = getHeightNat(cPtr);break;

                        case 5: res = getStripHeightNat(cPtr);break;

                        case 6: res = getNumBandsNat(cPtr);break;

                        case 7: res = getColorSpaceNat(cPtr);break;

                        case 8: res = getDataTypeNat(cPtr);break;

                }

                if(res<0)

                         throw new MrSIDException(msg2);

                 else return res;

        }

        /**

         * Devuelve el puntero a memoria del objeto en C.

         */

        public long getPtr(){

                return cPtr;

        }

        /**

         * Carga de la libreria jmrsid  

         */ 

        static{

                System.loadLibrary("jmrsid");

        }

}