Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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 org.gvsig.raster.impl.buffer.cache;

import java.io.IOException;

import org.gvsig.fmap.dal.coverage.exception.ProcessInterruptedException;

import org.gvsig.raster.impl.buffer.RasterMemoryBuffer;

/**

 * Esta clase representa una p?gina de cache. Una p?gina no es m?s que un buffer de datos

 * con todas sus funcionalidades con un uso especifico, el de ser una p?gina. 

 * 

 * @author Nacho Brodin (nachobrodin@gmail.com)

 *

 */

public class PageBandBuffer extends RasterMemoryBuffer {

        /**

         * N?mero de banda que corresponde a este PageBandBuffer

         */

        private int numBand = 0;

        private HddPage[] hddPages = null;

        /**

         * Constructor.

         * @param dataType Tipo de dato

         * @param width Ancho de p?gina

         * @param height Alto de p?gina

         * @param bandNr N?mero de bandas

         * @param malloc true para reservar de memoria en el buffer 

         */

        public PageBandBuffer(int dataType, int width, int height, int bandNr, boolean malloc, int numBand){

                super(dataType, width, height, bandNr, malloc);

                this.numBand = numBand;

        }

        /**

         * Asigna la lista de paginas de disco

         * @param hddList Lista de p?ginas de disco

         */

        public void setHddPages(HddPage[] hddList){

                this.hddPages = hddList;

        }

        /**

         * Carga una p?gina especificada en el par?metro nPag con los datos necesarios.

         * Para esto utiliza el dataSource.

         *   

         * @param nPag N?mero de p?gina a cargar

         */

        public void loadPage(int nPag) throws ProcessInterruptedException {

                hddPages[nPag].getDataServer(numBand).loadPage(this);

        }

        /**

         * Salva una p?gina especificada en el par?metro nPag a disco. 

         * Para esto utiliza el dataSource

         *   

         * @param nPag N?mero de p?gina a salvar

         * @throws IOException

         */

        public void savePage(int nPag) throws IOException{

                hddPages[nPag].getDataServer(numBand).savePage(this);

        }

}