Application: gvSIG desktop » gvSIG raster

package org.gvsig.raster.cache.buffer.impl.stripecache.horizontal;

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

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

import org.gvsig.raster.cache.buffer.impl.RasterBuffer;

import org.gvsig.raster.cache.buffer.impl.stripecache.CacheBand;

import org.gvsig.raster.cache.buffer.impl.stripecache.LRUAlgorithm;

/**

 * This class represent a byte band loaded in cache.

 * 

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

 */

public class FloatBand extends CacheBand {

        public FloatBand(CacheHorzImpl cache, LRUAlgorithm lru, int band){

                super(cache, lru, band);

                this.setDataType(RasterBuffer.TYPE_FLOAT);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.cache.buffer.impl.BandImpl#getNumberOfBlocks()

         */

        public int getNumberOfBlocks() {

                return (int)Math.ceil((double)getHeight() / (double)getBlockSize());

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.RasterBand#assign(float)

         */

        public void assign(float value) {

                for(int line = 0; line < getHeight(); line ++){

                        boolean beginLine = true;  //Para acelerar solo comprobar? si la p?gina est? en cach? cada vez que empieza una l?nea

                    for(int col = 0; col < getWidth(); col ++){

                            try {

                                    if(beginLine){

                                            lru.cacheAccess(line, false);

                                            beginLine = false;

                                    }

                            } catch (InvalidPageNumberException e) {return;

                            } catch (InterruptedException e) {return;}

                            cache.getAccessPage().setElem((line & cache.getOffset()), col, nBand, value);                

                    }

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.RasterBand#getFloatBlock(int)

         */

        public float[][] getFloatBlock(int block) {

                int line = block * getBlockSize();

                try {

                        lru.cacheAccess(line, true);

                } catch (InvalidPageNumberException e) {return null;}

                catch (InterruptedException e) {return null;}

                return cache.getAccessPage().getBand(nBand).getFloatBlock(block);

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.IRasterBand#setFloatBlock(float[][], int)

         */

        public void setFloatBlock(float[][] data, int block) {

                int line = block * getBlockSize();

                try {

                        lru.cacheAccess(line, true);

                } catch (InvalidPageNumberException e) {return;}

                catch (InterruptedException e) {return;}

                try {

                        cache.getAccessPage().getBand(nBand).setFloatBlock(data, block);

                } catch (OperationNotSupportedException e) {

                        //Solo buffers de solo lectura

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.RasterBand#getFloatLine(int)

         */

        public float[] getFloatLine(int line) {

                if(exists(line)) {

                        return cache.getAccessPage().getLineFromBandFloat(

                                        (line & cache.getOffset()), nBand);

                }

                return null;

        }

        /*

         * (non-Javadoc)

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

         */

        public float getElemFloat(int line, int col) {

                if(exists(line)) {

                        return cache.getAccessPage().getElemFloat(

                                        (line & cache.getOffset()), col, nBand);

                }

                return getNoDataValue().getValue().floatValue();

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.RasterBand#setByteLine(float[], int)

         */

        public void setByteLine(float[] data, int line) {

                if(exists(line)) {

                        cache.getAccessPage().setLineInBandFloat(

                                        data, (line & cache.getOffset()), nBand);

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.buffer.RasterBand#setElem(int, int, float)

         */

        public void setElem(int line, int col, float data) {

                if(exists(line)) {

                        cache.getAccessPage().setElem(

                                        (line & cache.getOffset()), col, nBand, data);

                }

        }

        /*

         * (non-Javadoc)

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

         */

        public Object clone() {

                CacheHorzImpl cloneCache = (CacheHorzImpl)cache.clone();

                LRUAlgorithm cloneLRU = new LRUAlgorithm(cloneCache);

                return new FloatBand(cloneCache, cloneLRU, nBand);

        }

}