Application: gvSIG desktop » gvSIG raster

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

import java.io.IOException;

import junit.framework.TestCase;

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

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

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

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

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

import org.gvsig.raster.cache.buffer.impl.io.BufferDataSourceImpl;

/**

 * This test swap two bands of a raster and save the result in other file.

 * Finally it compares the output bands with the input bands.

 * 

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

 */

public class TestSwapTwoBands extends TestCase {

        private String rasterIn = "./src/test/resources/image/001m09_1_0.tif";

        public void start() {

                this.setUp();

                this.testStack();

        }

        public void setUp() {

                System.err.println("ROCache TestSwapTwoBands running...");

        }

        public void testStack() {

                long t1 = System.currentTimeMillis();

                try {

                        //Reducimos el tama?o de la cache para una prueba con menos datos

                        BufferCacheManagerImpl.cacheSize = 2;

                        BufferCacheManagerImpl.pageSize = 0.2;

                        BufferDataSource ds = null;

                        try {

                                ds = new BufferDataSourceImpl(rasterIn);

                        } catch (IOException e) {

                                e.printStackTrace();

                        }

                        //Create Buffer

                        Buffer buf1 = new RasterReadOnlyBuffer(ds);

                        Buffer buf2 = new RasterReadOnlyBuffer(ds);

                        try {

                                buf2.swapBands(0, 2);

                        } catch (WrongParameterException e) {

                                e.printStackTrace();

                        }

                        Band band1 = buf1.getBand(0);

                        Band band2 = buf2.getBand(2);

                        compareBands(band1, band2);

                        band1 = buf1.getBand(2);

                        band2 = buf2.getBand(0);

                        compareBands(band1, band2);

                        band1 = buf1.getBand(1);

                        band2 = buf2.getBand(1);

                        compareBands(band1, band2);

                        buf1.free();

                        buf2.free();

                } catch (IOException e) {

                        e.printStackTrace();

                }

                long t2 = System.currentTimeMillis();

                System.out.println("Tiempo ROCache TestSwapTwoBands: " + (t2 - t1) + " milisegundos");

        }

        public void compareBands(Band band1, Band band2) {

                for (int i = 0; i < band1.getHeight(); i++) {

                        for (int j = 0; j < band1.getWidth(); j++) {

                                byte b1 = band1.getElemByte(i, j);

                                byte b2 = band2.getElemByte(i, j);

                                assertEquals(b1, b2);

                        }

                }

        }

}