Application: gvSIG desktop » gvSIG raster

package org.gvsig.raster.cache.buffer.impl.rocache;

import java.util.ArrayList;

import org.gvsig.raster.cache.buffer.BufferDataSource;

import org.gvsig.raster.cache.buffer.Buffer;

import org.gvsig.raster.cache.buffer.PxTile;

import org.gvsig.raster.cache.buffer.exception.OperationNotSupportedException;

/**

 * This class represent a byte band loaded in memory.

 * 

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

 */

public class ByteBand extends ReadOnlyCacheBand {

        public ByteBand(ArrayList<PxTile> stripeList,

                        BufferDataSource dataSource, int offset, int bitsPag, int band,

                        int width, int height) {

                super(stripeList, dataSource, offset, bitsPag, band, width, height, Buffer.TYPE_BYTE);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.IRasterBand#getByteBlock(int)

         */

        public byte[][] getByteBlock(int block){

                if(block != loadedPage)

                        loadOrSwapPage(block);

                return page.getBand(0).getByteBlock(block);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.IRasterBand#getElemByte(int, int)

         */

        public byte getElemByte(int line, int col) {

                int pag = line >> bitsPag;

                if(pag != loadedPage)

                        loadOrSwapPage(pag);

                return page.getElemByte(line & offset, col, 0);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.IRasterBand#getByteLine(int)

         */

        public byte[] getByteLine(int line) throws OperationNotSupportedException {

                int pag = line >> bitsPag;

                if(pag != loadedPage)

                        loadOrSwapPage(pag);

                return page.getLineByte(line & offset)[0];

        }

        /*

         * (non-Javadoc)

         * @see java.lang.Object#clone()

         */

        public Object clone() {

                BufferDataSource ds = dataSource.clone();        

                ByteBand result = new ByteBand(stripeList, 

                                ds,

                                offset,

                                bitsPag,

                                nBand,

                                getWidth(),

                                getHeight());

                return result;

        }

}