root / trunk / libraries / libRaster / tmp / cache / CacheDataServer.java @ 10740
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/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2006 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*/
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package org.gvsig.raster.dataaccess.cache; |
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import java.io.BufferedInputStream; |
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import java.io.BufferedOutputStream; |
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import java.io.DataInputStream; |
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import java.io.DataOutputStream; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.FileNotFoundException; |
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import java.io.FileOutputStream; |
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import java.io.IOException; |
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import org.gvsig.raster.driver.Band; |
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import org.gvsig.raster.driver.BandFoundInListException; |
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import org.gvsig.raster.driver.BandList; |
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import org.gvsig.raster.driver.GeoRasterWriter; |
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import org.gvsig.raster.driver.IBuffer; |
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import org.gvsig.raster.driver.IDataWriter; |
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import org.gvsig.raster.driver.NotSupportedExtensionException; |
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import org.gvsig.raster.driver.RasterDataset; |
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import org.gvsig.raster.driver.RasterDriverException; |
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import org.gvsig.raster.shared.Extent; |
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import org.gvsig.raster.shared.RasterLibrary; |
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/**
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* Servidor de datos de cach?. Esta clase es la encargada de volcar a disco las p?ginas de cach? y recuperar
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* las cuando le son solicitadas. Por ello debe implementar el interfaz ICacheDataSource con dos m?todos
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* loadPage y savePage. Ambos a partir del n?mero de p?gina recuperaran o salvaran de/a disco una p?gina.
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*
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* @author Nacho Brodin (brodin_ign@gva.es)
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*
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*/
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public class CacheDataServer implements ICacheDataSource{ |
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/**
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* Directorio temporal para la cach?. Si gastamos el mismo que andami este se ocupar? de gestionar su
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* destrucci?n al cerrar gvSIG.
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*/
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private String tempDirectoryPath = RasterLibrary.tempCacheDirectoryPath; |
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private String id = null; //Identificador de fichero. |
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/**
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* Constructor.
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* Crea el identificador para todos los trozos de cach? que se guardar?n en disco.
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*
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*/
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public CacheDataServer() {
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if(id == null) |
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id = Long.toString(System.currentTimeMillis()); |
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} |
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/* (non-Javadoc)
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* @see org.gvsig.fmap.dataaccess.cache.ICacheDataSource#loadPage(int, org.gvsig.fmap.dataaccess.cache.PageBuffer)
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*/
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public void loadPage(int nPag, PageBuffer pageBuffer) { |
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String inFileName = tempDirectoryPath + File.separator + id + "-" + nPag; |
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File file = new File(inFileName); |
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if(!file.exists())
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return;
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DataInputStream dis;
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try {
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dis = new DataInputStream( new BufferedInputStream(new FileInputStream(file))); |
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read(dis, pageBuffer); |
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dis.close(); |
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}catch (FileNotFoundException e) { |
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return;
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}catch(IOException ex){ |
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return;
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} |
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} |
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/* (non-Javadoc)
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* @see org.gvsig.fmap.dataaccess.cache.ICacheDataSource#savePage(int, org.gvsig.fmap.dataaccess.cache.PageBuffer)
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*/
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public void savePage(int nPag, PageBuffer pageBuffer) throws IOException { |
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createTempDirectory(); |
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String fileName = tempDirectoryPath + File.separator + id + "-" + nPag; |
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File f = new File(fileName); |
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DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(f))); |
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save(dos, pageBuffer); |
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dos.close(); |
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} |
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/**
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* Esta funci?n crea el directorio para temporales y devuelve el nombre de este.
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* @return
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*/
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private String createTempDirectory(){ |
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File tempDirectory = new File(tempDirectoryPath); |
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if (!tempDirectory.exists())
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tempDirectory.mkdir(); |
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return tempDirectoryPath;
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} |
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//TODO: TEST: Implementar y probar el cacheado para tipos de datos != de byte
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/**
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* Tilea un raster en disco para que sea accesible por la cach?.
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* @param fileName Nombre del fichero a tilear
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* @param pageLines N?mero de l?neas de cada tile
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* @throws IOException
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* @throws RasterDriverException
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* @throws NotSupportedExtensionException
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*/
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public void cachear(String fileName, int pageLines)throws IOException, NotSupportedExtensionException, RasterDriverException{ |
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if(id == null) |
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id = Long.toString(System.currentTimeMillis()); |
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RasterDataset grf = RasterDataset.openFile(null, fileName);
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//Creamos un BandList con todas las bandas del fichero
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BandList bandList = new BandList();
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for(int i = 0; i < grf.getBandCount();i++){ |
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try{
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Band band = new Band(grf.getFName(), i, grf.getDataType());
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bandList.addBand(band, i); |
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bandList.addDrawableBand(i, i); |
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}catch(BandFoundInListException ex){
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//No a?adimos la banda
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} |
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} |
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int pages = (int)Math.ceil(grf.getHeight() / pageLines); |
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createTempDirectory(); |
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PageBuffer pageBuffer = new PageBuffer(grf.getDataType(), grf.getWidth(), pageLines, grf.getBandCount(), true); |
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int y = 0; |
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for(int i = 0; i < pages; i++){ |
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grf.getWindowRaster(0, y, grf.getWidth(), pageLines, bandList, pageBuffer);
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String outFileName = tempDirectoryPath + File.separator + id + "-" + i; |
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File f = new File(outFileName); |
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DataOutputStream dos = new DataOutputStream( new BufferedOutputStream(new FileOutputStream(f))); |
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save(dos, pageBuffer); |
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dos.close(); |
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y += pageLines; |
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} |
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//Solo para pruebas
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//convertFromByteFileToTif(grf, pageBuffer, pageLines);
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} |
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/**
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* Funci?n para pruebas.
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* Convierte los ficheros generados por la funci?n cachear en ficheros tif para comprobar que est?n
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* bien generados.
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* @param grf
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* @param pageBuffer
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* @param pageLines
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* @throws IOException
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*/
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private void convertFromByteFileToTif(RasterDataset grf, PageBuffer pageBuffer, int pageLines)throws IOException{ |
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int w = pageBuffer.getWidth();
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int h = pageBuffer.getHeight();
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int pages = (int)Math.ceil(grf.getHeight() / pageLines); |
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GeoRasterWriter grw = null;
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PageBuffer pageBuffer2 = new PageBuffer(grf.getDataType(), grf.getWidth(), pageLines, grf.getBandCount(), true); |
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for(int i = 0; i < pages; i++){ |
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String inFileName = tempDirectoryPath + File.separator + id + "-" + i; |
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File f = new File(inFileName); |
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DataInputStream dis = new DataInputStream( new BufferedInputStream(new FileInputStream(f))); |
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byte[] b; |
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switch(pageBuffer.getDataType()){
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case 0: b = new byte[pageBuffer.getWidth() * pageBuffer.getHeight() * pageBuffer.getBandCount()]; |
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dis.readFully(b); |
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++){ |
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for(int line = 0; line < pageBuffer.getHeight(); line ++){ |
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byte[] linea = new byte[w]; |
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for(int d = 0; d < linea.length; d ++) |
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linea[d] = b[(iBand * w * h) + (line * w) + d]; |
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pageBuffer2.setLineInBandByte(linea, line, iBand); |
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} |
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} |
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break;
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} |
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dis.close(); |
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IDataWriter dataWriter1 = new WriterBufferServer(pageBuffer2);
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grw = GeoRasterWriter.getWriter(dataWriter1, |
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inFileName + ".tif",
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pageLines, //Block size
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pageBuffer2.getBandCount(), |
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new Extent(0, 0, pageBuffer2.getWidth() - 1, pageBuffer2.getHeight() - 1), |
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0,
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pageBuffer2.getWidth(), |
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pageBuffer2.getHeight(), |
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pageBuffer2.getDataType()); |
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grw.dataWrite(); |
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grw.writeClose(); |
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} |
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} |
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/**
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* Salva un PageBuffer sobre un stream DataOutpuStream dependiendo del tipo de dato del
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* buffer.
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* @param dos DataOutputStream
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* @param pageBuffer PageBuffer
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* @throws IOException
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*/
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private void save(DataOutputStream dos, PageBuffer pageBuffer) throws IOException{ |
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switch(pageBuffer.getDataType()){
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case IBuffer.TYPE_BYTE:
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++) |
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for(int line = 0; line < pageBuffer.getHeight(); line ++) |
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//for(int col = 0; col < pageBuffer.getWidth(); col ++)
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//dos.writeByte(pageBuffer.getElemByte(line, col, iBand));
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dos.write(pageBuffer.getLineFromBandByte(line, iBand)); |
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break;
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case IBuffer.TYPE_SHORT:
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++) |
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for(int line = 0; line < pageBuffer.getHeight(); line ++) |
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for(int col = 0; col < pageBuffer.getWidth(); col ++) |
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dos.writeShort(pageBuffer.getElemShort(line, col, iBand)); |
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break;
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case IBuffer.TYPE_INT:
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++) |
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for(int line = 0; line < pageBuffer.getHeight(); line ++) |
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for(int col = 0; col < pageBuffer.getWidth(); col ++) |
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dos.writeInt(pageBuffer.getElemInt(line, col, iBand)); |
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break;
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case IBuffer.TYPE_FLOAT:
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++) |
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for(int line = 0; line < pageBuffer.getHeight(); line ++) |
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for(int col = 0; col < pageBuffer.getWidth(); col ++) |
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dos.writeFloat(pageBuffer.getElemFloat(line, col, iBand)); |
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break;
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case IBuffer.TYPE_DOUBLE:
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++) |
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for(int line = 0; line < pageBuffer.getHeight(); line ++) |
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for(int col = 0; col < pageBuffer.getWidth(); col ++) |
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dos.writeDouble(pageBuffer.getElemDouble(line, col, iBand)); |
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break;
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} |
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} |
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/**
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* Carga un PageBuffer desde un stream DataInputStream dependiendo del tipo de dato del
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* buffer.
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* @param dis DataInputStream
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* @param pageBuffer PageBuffer
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* @throws IOException
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*/
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private void read(DataInputStream dis, PageBuffer pageBuffer) throws IOException{ |
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int w = pageBuffer.getWidth();
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int h = pageBuffer.getHeight();
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int wxh = w * h;
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int j = 0; |
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switch(pageBuffer.getDataType()){
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case IBuffer.TYPE_BYTE:
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byte[] b = new byte[pageBuffer.getWidth() * pageBuffer.getHeight() * pageBuffer.getBandCount()]; |
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dis.readFully(b); |
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//while(j < b.length){ b[j] = dis.readByte(); j ++; }
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++){ |
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for(int line = 0; line < pageBuffer.getHeight(); line ++){ |
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byte[] linea = new byte[w]; |
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for(int d = 0; d < linea.length; d ++) |
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linea[d] = b[(iBand * wxh) + (line * w) + d]; |
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pageBuffer.setLineInBandByte(linea, line, iBand); |
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} |
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} |
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break;
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case IBuffer.TYPE_SHORT:
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short[] s = new short[pageBuffer.getWidth() * pageBuffer.getHeight() * pageBuffer.getBandCount()]; |
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while(j < s.length){ s[j] = dis.readShort(); j ++; }
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++){ |
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for(int line = 0; line < pageBuffer.getHeight(); line ++){ |
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short[] linea = new short[w]; |
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for(int x = 0; x < linea.length; x ++) |
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linea[x] = s[(iBand * wxh) + (line * w) + x]; |
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pageBuffer.setLineInBandShort(linea, line, iBand); |
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} |
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} |
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break;
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case IBuffer.TYPE_INT:
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int[] i = new int[pageBuffer.getWidth() * pageBuffer.getHeight() * pageBuffer.getBandCount()]; |
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while(j < i.length){ i[j] = dis.readInt(); j ++; }
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++){ |
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for(int line = 0; line < pageBuffer.getHeight(); line ++){ |
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int[] linea = new int[w]; |
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for(int x = 0; x < linea.length; x ++) |
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linea[x] = i[(iBand * wxh) + (line * w) + x]; |
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pageBuffer.setLineInBandInt(linea, line, iBand); |
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} |
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} |
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break;
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case IBuffer.TYPE_FLOAT:
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float[] f = new float[pageBuffer.getWidth() * pageBuffer.getHeight() * pageBuffer.getBandCount()]; |
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while(j < f.length){ f[j] = dis.readFloat(); j ++; }
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++){ |
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for(int line = 0; line < pageBuffer.getHeight(); line ++){ |
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float[] linea = new float[w]; |
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for(int x = 0; x < linea.length; x ++) |
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linea[x] = f[(iBand * wxh) + (line * w) + x]; |
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pageBuffer.setLineInBandFloat(linea, line, iBand); |
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} |
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} |
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break;
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case IBuffer.TYPE_DOUBLE:
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double[] d = new double[pageBuffer.getWidth() * pageBuffer.getHeight() * pageBuffer.getBandCount()]; |
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while(j < d.length){ d[j] = dis.readDouble(); j ++; }
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for(int iBand = 0; iBand < pageBuffer.getBandCount(); iBand ++){ |
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for(int line = 0; line < pageBuffer.getHeight(); line ++){ |
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double[] linea = new double[w]; |
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for(int x = 0; x < linea.length; x ++) |
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linea[x] = d[(iBand * wxh) + (line * w) + x]; |
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pageBuffer.setLineInBandDouble(linea, line, iBand); |
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} |
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} |
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break;
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} |
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} |
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//---------------------------------------------------------------
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//TILEADO A BASE DE TIFF: Desechado porque es muy lento
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/*public void loadPage(int nPag, PageBuffer pageBuffer) {
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String fileName = tempDirectoryPath + File.separator + id + "-" + nPag + ".tif";
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File file = new File(id);
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if(!file.exists())
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return; //El trozo no ha sido volcado a disco por lo que no se carga.
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GeoRasterFile grf = GeoRasterFile.openFile(null, fileName);
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//Creamos un BandList con todas las bandas del fichero
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BandList bandList = new BandList();
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for(int i = 0; i < grf.getBandCount();i++){
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try{
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Band band = new Band(grf.getName(), i, grf.getDataType());
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bandList.addBand(band, i);
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}catch(BandFoundInListException ex){
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//No a?adimos la banda
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}
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}
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grf.getWindowRaster(0, 0, grf.getWidth(), grf.getHeight(), bandList, pageBuffer);
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}*/
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/*public void savePage(int nPag, PageBuffer pageBuffer) throws IOException {
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createTempDirectory();
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String fileName = tempDirectoryPath + File.separator + id + "-" + nPag + ".tif";
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IDataWriter dataWriter = new WriterBufferServer(pageBuffer);
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GeoRasterWriter grw = GeoRasterWriter.getWriter(dataWriter,
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fileName,
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pageBuffer.getHeight(), //Block size
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pageBuffer.getBandCount(),
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new Extent(0, 0, pageBuffer.getWidth() - 1, pageBuffer.getHeight() - 1),
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0,
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pageBuffer.getWidth(),
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pageBuffer.getHeight(),
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pageBuffer.getDataType());
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grw.dataWrite();
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grw.writeClose();
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}*/
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} |
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