| gvSIG desktop 1

package org.gvsig.raster.buffer.cache;

import java.io.IOException;

import java.util.Date;

import junit.framework.TestCase;

import org.gvsig.raster.RasterLibrary;

import org.gvsig.raster.buffer.BufferFactory;

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

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

import org.gvsig.raster.dataset.IBuffer;

import org.gvsig.raster.dataset.NotSupportedExtensionException;

import org.gvsig.raster.dataset.RasterDataset;

import org.gvsig.raster.dataset.RasterDriverException;

/**

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

 */

public class TestSaveAndLoadPages extends TestCase {

        private String baseDir = "./test-images/";

        private String path = baseDir + "03AUG23153350-M2AS-000000122423_01_P001-BROWSE.jpg";

        private RasterDataset f = null;

        private BufferFactory ds = null;

        private int pages = 10;

        static{

                RasterLibrary.wakeUp();

        }

        public void start() {

                this.setUp();

                this.testStack();

        }

        public void setUp() {

                System.err.println("TestSaveAndLoadPages running...");

                try {

                        f = RasterDataset.open(null, path);

                } catch (NotSupportedExtensionException e) {

                        e.printStackTrace();

                } catch (RasterDriverException e) {

                        e.printStackTrace();

                }

        }

        public void testStack() {

                int[] drawableBands = {0, 1, 2};

                ds = new BufferFactory(f);

                ds.addDrawableBands(drawableBands);

                ds.setAreaOfInterest(0, 0, f.getWidth(), f.getHeight());

                int h =  f.getHeight() / pages;

                PageBandBuffer[] pbWriterList = new PageBandBuffer[h];

                CacheDataServer[] cds = new CacheDataServer[h];

                long t2, t3, t4;

        long t1 = new Date().getTime();

                //Salvamos los PageBuffer

                IBuffer buf = ds.getRasterBuf();

                byte[] data = new byte[3];

                for (int i = 0; i < pages; i++) {

                        pbWriterList[i] = new PageBandBuffer(ds.getDataType(), f.getWidth(), h, 3, true, i);

                        cds[i] = new CacheDataServer(null, 0, i);

                        for (int k = 0; k < f.getWidth(); k++) {

                                for (int j = 0; j < h; j++) {

                                        buf.getElemByte((i * h) + j, k, data);

                                        pbWriterList[i].setElemByte(j, k, data);

                                }        

                        }

                        try {

                                cds[i].savePage(pbWriterList[i]);

                        } catch (IOException e) {

                                e.printStackTrace();

                        }

                }

                t2 = new Date().getTime();

        System.out.println("Time: Cargar PageBuffers y salvar a disco: " + ((t2 - t1) / 1000D) + ", secs.");

                //Recuperamos las p?ginas

                PageBandBuffer[] pbReaderList = new PageBandBuffer[h];

                for (int i = 0; i < pages; i++) {

                        pbReaderList[i] = new PageBandBuffer(ds.getDataType(), f.getWidth(), h, 3, true, i);

                        cds[i].loadPage(pbReaderList[i]);

                }

                t3 = new Date().getTime();

        System.out.println("Time: Recuperar p?ginas de disco: " + ((t3 - t2) / 1000D) + ", secs.");

                //Comparamos

                byte[] a = new byte[3];

                byte[] b = new byte[3];

                for (int i = 0; i < pages; i++) {

                        for (int k = 0; k < f.getWidth(); k++) {

                                for (int j = 0; j < h; j++) {

                                        pbReaderList[i].getElemByte(j, k, a);

                                        pbWriterList[i].getElemByte(j, k, b);

                                        for (int t = 0; t < 3; t++) 

                                                assertEquals(a[t], b[t]);

                                }

                        }

                }

                t4 = new Date().getTime();

        System.out.println("Time: Comparaciones: " + ((t4 - t3) / 1000D) + ", secs.");

        }

}