gvsig-raster / org.gvsig.raster / trunk / org.gvsig.raster / org.gvsig.raster.lib / org.gvsig.raster.lib.impl / src / main / java / org / gvsig / raster / impl / buffer / cache / RasterReadOnlyBuffer.java @ 2438
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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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., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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package org.gvsig.raster.impl.buffer.cache; |
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import java.awt.Rectangle; |
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import java.awt.geom.Point2D; |
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import java.io.FileNotFoundException; |
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import org.gvsig.fmap.dal.coverage.RasterLibrary; |
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import org.gvsig.fmap.dal.coverage.dataset.Buffer; |
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import org.gvsig.fmap.dal.coverage.datastruct.Band; |
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import org.gvsig.fmap.dal.coverage.datastruct.BandList; |
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import org.gvsig.fmap.dal.coverage.datastruct.Extent; |
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import org.gvsig.fmap.dal.coverage.exception.FileNotExistsException; |
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import org.gvsig.fmap.dal.coverage.exception.InvalidSetViewException; |
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import org.gvsig.fmap.dal.coverage.exception.NotSupportedExtensionException; |
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import org.gvsig.fmap.dal.coverage.exception.ProcessInterruptedException; |
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import org.gvsig.fmap.dal.coverage.exception.QueryException; |
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import org.gvsig.fmap.dal.coverage.exception.RasterDriverException; |
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import org.gvsig.fmap.dal.coverage.store.RasterDataStore; |
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import org.gvsig.fmap.dal.coverage.store.RasterQuery; |
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import org.gvsig.raster.impl.DefaultRasterManager; |
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import org.gvsig.raster.impl.buffer.RasterBuffer; |
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import org.gvsig.raster.impl.datastruct.ExtentImpl; |
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import org.gvsig.raster.impl.provider.AbstractRasterProvider; |
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import org.gvsig.raster.impl.store.QueryableRaster; |
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/**
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*
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*/
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public class RasterReadOnlyBuffer extends RasterBuffer { |
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/**
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* Pagina cargada
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*/
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private Buffer page = null; |
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private Buffer secondPage = null; |
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/**
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* N?mero de p?gina cargada en Buffer
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*/
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private int loadedPage = -1; |
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private int loadedSecondPage = -1; |
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private int heightLastPage = 0; |
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private RasterDataStore datasource = null; |
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private int bitsPag = 0; |
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/**
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* N?mero de p?ginas
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*/
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private int nPages = 0; |
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/**
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* Lista de bandas
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*/
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private BandList bandList = null; |
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private int[] drawableBands = null; |
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/**
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* Extensi?n asociada al buffer
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*/
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private int minX = 0, minY = 0, maxX = 0, maxY = 0; |
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/**
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* Query para las cargas de p?ginas. Lleva asociado un IRasterDatasource de un raster
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* de disco.
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*/
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private RasterQuery query = null; |
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/**
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* Para extraer el desplazamiento de una direcci?n (l?nea de raster) hay que hacer una operaci?n And con
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* con la altura de la p?gina -1. Por ejemplo, una p?gina de 16 l?neas de altura el desplazamiento ser?
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* 16 - 1 = 15 porque 15 en binario es 1111.
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*
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* Si queremos acceder a la linea del raster n?mero 83 (1010011) realizando la operaci?n And con el valor del
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* desplazamiento obtenemos (0001111 & 1010011 = 0000011), es decir el valor 3 en decimal. Esto quiere decir
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* que la l?nea 83 del raster es la 3 de su p?gina.
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*/
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private int offset = 1; |
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private int bufWidth, bufHeight; |
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private int blockHeight = RasterLibrary.blockHeight; |
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/**
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* Constructor. Asigna las variables de inicializaci?n y crea la estructura de
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* la cach? con los datos pasados.
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* @param dataType Tipo de dato
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* @param width Ancho
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* @param height Alto
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* @param bandNr Banda
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* @param orig
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* @throws RasterDriverException
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* @throws NotSupportedExtensionException
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* @throws FileNotFoundException
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*/
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public RasterReadOnlyBuffer(int dataType, int width, int height, int nBand) { |
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this.dataType = dataType;
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this.width = width;
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this.height = height;
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this.nBands = nBand;
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} |
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/**
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* Asigna los parametros relativos al buffer. Estos son el nombre del fichero asociado
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* y la extensi?n asignada
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* @param fileName Nombre del fichero asociado
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* @param ext Extensi?n
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*/
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public void setBufferParams(QueryableRaster q, Extent ext, BandList bandList) |
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throws InvalidSetViewException, FileNotExistsException, NotSupportedExtensionException {
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this.bandList = bandList;
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this.datasource = (RasterDataStore)q;
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if( ext.minX() < datasource.getExtent().minX() || ext.minY() < datasource.getExtent().minY() ||
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ext.maxX() > datasource.getExtent().maxX() || ext.maxY() > datasource.getExtent().maxY()) |
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throw new InvalidSetViewException(""); |
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Point2D p1 = datasource.worldToRaster(new Point2D.Double(minX, maxY)); |
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Point2D p2 = datasource.worldToRaster(new Point2D.Double(maxX, minY)); |
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adjustPoints(p1, p2); |
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this.minX = (int)p1.getX(); |
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this.minY = (int)p1.getY(); |
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this.maxX = (int)p2.getX(); |
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this.maxY = (int)p2.getY(); |
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init(); |
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} |
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private void adjustPoints(Point2D ul, Point2D lr) { |
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double a = (ul.getX() - (int)ul.getX()); |
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double b = (ul.getY() - (int)ul.getY()); |
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ul.setLocation( (a > 0.99 || a < 0.005) ? Math.round(ul.getX()) : ul.getX(), |
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(b > 0.99 || b < 0.005) ? Math.round(ul.getY()) : ul.getY()); |
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lr.setLocation( (a > 0.99 || a < 0.005) ? Math.round(lr.getX()) : lr.getX(), |
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(b > 0.99 || b < 0.005) ? Math.round(lr.getY()) : lr.getY()); |
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} |
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/**
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* Asigna los parametros relativos al buffer. Estos son el nombre del fichero asociado
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* y la extensi?n asignada
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* @param dataStore Dataset del fichero asociado
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* @param minX Coordenada pixel X m?nima
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* @param minY Coordenada pixel Y m?nima
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* @param maxX Coordenada pixel X m?xima
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* @param maxY Coordenada pixel Y m?xima
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* @exception InvalidSetViewException
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* @exception FileNotExistsException
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* @exception NotSupportedExtensionException
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*/
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public void setBufferParams(QueryableRaster q, int minX, int minY, int maxX, int maxY, BandList bandList) |
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throws InvalidSetViewException, FileNotExistsException, NotSupportedExtensionException {
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this.bandList = bandList;
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this.datasource = (RasterDataStore)q;
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this.minX = minX;
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this.minY = minY;
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this.maxX = maxX;
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this.maxY = maxY;
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if(Math.abs(maxX - minX) != width || Math.abs(maxY - minY) != height) { |
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bufWidth = width; |
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bufHeight = height; |
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} |
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init(); |
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} |
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/**
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* Acciones de inicializaci?n.
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* Crear el buffer de memoria y la lista de bandas, as? comno los bits empleados
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* por cada p?gina de memoria y el desplazamiento que supone para el calculo
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* de direcciones.
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*/
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private void init() { |
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//Calculo de los bits por p?gina
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int h = blockHeight;
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while(h > 1) { |
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h >>= 1;
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bitsPag ++; |
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} |
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//Calculo del desplazamiento
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offset = blockHeight - 1;
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//Creamos el bufferFactory asociado a la carga de p?ginas. Cada p?gina se fuerza
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//a que sea cargada en memoria.
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query = DefaultRasterManager.getInstance().createQuery(); |
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query.setMemoryBuffer(true);
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query.setDrawableBands(bandList.getDrawableBands()); |
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nPages = (int)Math.ceil((double)height / (double)blockHeight); |
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//double aux = ((double)height / (double)RasterLibrary.blockHeight);
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//heightLastPage = (int)((aux - (int)aux) * RasterLibrary.blockHeight);
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if(height % blockHeight == 0) |
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heightLastPage = blockHeight; |
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else {
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double aux = ((double)height / (double)blockHeight); |
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heightLastPage = (int)((aux - (int)aux) * blockHeight); |
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} |
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drawableBands = new int[datasource.getBandCount()]; |
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for (int i = 0; i < drawableBands.length; i++) |
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drawableBands[i] = i; |
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} |
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public void addDrawableBands(int[] db) { |
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if(db == null || db.length > this.bandList.getBandCount()) |
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return;
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this.bandList.setDrawableBands(db);
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query = DefaultRasterManager.getInstance().createQuery(); |
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query.setMemoryBuffer(true);
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query.setDrawableBands(bandList.getDrawableBands()); |
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} |
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public int getBandCount() { |
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return this.bandList.getDrawableBandsCount(); |
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} |
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/**
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* Calcula la extensi?n de las p?ginas en coordenadas del mundo real
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* @param dataset Dataset
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* @param nPages N?mero de p?ginas en que se divide el raster
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* @deprecated
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* @return Extensi?n de cada p?gina
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*/
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public Extent[] calcExtentPages(AbstractRasterProvider dataset, int nPages) { |
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Extent datasetExtent = dataset.getExtent(); |
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double h = (blockHeight * dataset.getExtent().height()) / dataset.getHeight();
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Extent[] ext = new Extent[nPages]; |
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double minX = datasetExtent.getMin().getX();
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double maxX = datasetExtent.getMax().getX();
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double maxY = datasetExtent.getMax().getY();
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double minY = maxY - h;
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for (int i = 0; i < ext.length; i++) { |
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ext[i] = new ExtentImpl(minX, maxY, maxX, minY);
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maxY = minY; |
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minY -= h; |
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if(minY < datasetExtent.minY())
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minY = datasetExtent.minY(); |
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} |
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return ext;
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} |
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public void malloc(int dataType, int width, int height, int bandNr) { |
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} |
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public boolean isBandSwitchable() { |
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return false; |
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} |
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private Buffer queryPage(int pag) throws ProcessInterruptedException, QueryException { |
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int w = maxX - minX + 1; |
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int h = maxY - minY + 1; |
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if((minX + w) > datasource.getWidth())
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w = (int)(datasource.getWidth() - minX);
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if(bufWidth == 0 && bufHeight == 0) { |
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if(pag == nPages - 1) { |
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Rectangle r = new Rectangle(minX, (blockHeight * pag) + minY, w, heightLastPage); |
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query.setAreaOfInterest(r); |
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} else {
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Rectangle r = new Rectangle(minX, (blockHeight * pag) + minY, w, blockHeight); |
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query.setAreaOfInterest(r); |
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} |
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} else {
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int hPage = (int)Math.round((blockHeight * h) / (double)bufHeight); |
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if(pag == nPages - 1) { |
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int hLastPage = 0; |
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if(heightLastPage == bufHeight) {
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hLastPage = h; |
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hPage = 0;
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} else
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hLastPage = (int)Math.round((heightLastPage * h) / (double)bufHeight); |
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int newMiY = (hPage * pag) + minY;
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if((newMiY + hLastPage) > datasource.getHeight())
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hLastPage = (int)(datasource.getHeight() - newMiY);
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Rectangle r = new Rectangle(minX, newMiY, w, hLastPage); |
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query.setAreaOfInterest(r, bufWidth, heightLastPage); |
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} else {
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Rectangle r = new Rectangle(minX, (hPage * pag) + minY, w, hPage); |
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query.setAreaOfInterest(r, bufWidth, blockHeight); |
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} |
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} |
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return datasource.query(query);
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} |
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/**
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* Carga las p?ginas de memoria cuando hay un fallo en el acceso al dato
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* @param pag N?mero de p?gina a cargar
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*/
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private void loadPage(int pag) { |
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try {
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if(page == null) { |
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page = queryPage(pag); |
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loadedPage = pag; |
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if((pag + 1) < nPages) { |
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secondPage = queryPage(pag + 1);//datasource.query(query); |
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loadedSecondPage = pag + 1;
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} |
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} else {
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if(pag == loadedSecondPage)
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switchPage(); |
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else {
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switchPage(); |
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page = queryPage(pag); |
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loadedPage = pag; |
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} |
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} |
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} catch (ProcessInterruptedException e) {
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} catch (QueryException e) {
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} finally {
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//Al interrumpir la carga de datos de un buffer o producirse una excepci?n page quedar? como null.
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//Tenemos que asignarle alg?n valor para que las ?ltimas consultas no den error.
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if(page == null) { |
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page = DefaultRasterManager.getInstance().createBuffer(dataType, width, height, nBands, true);
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loadedPage = pag; |
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} |
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} |
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} |
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/**
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* Intercambia las dos p?ginas de memoria
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*/
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private void switchPage() { |
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Buffer aux = secondPage;
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secondPage = page; |
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page = aux; |
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int auxint = loadedSecondPage;
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loadedSecondPage = loadedPage; |
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loadedPage = auxint; |
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} |
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//*********************************************************
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public byte[][] getLineByte(int line) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineByte(line & offset);
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} |
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public short[][] getLineShort(int line) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineShort(line & offset);
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} |
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public int[][] getLineInt(int line) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineInt(line & offset);
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} |
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public float[][] getLineFloat(int line) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineFloat(line & offset);
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} |
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public double[][] getLineDouble(int line) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineDouble(line & offset);
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} |
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//*********************************************************
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public byte[] getLineFromBandByte(int line, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineFromBandByte(line & offset, band);
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} |
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public short[] getLineFromBandShort(int line, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineFromBandShort(line & offset, band);
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} |
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public int[] getLineFromBandInt(int line, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineFromBandInt(line & offset, band);
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} |
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public float[] getLineFromBandFloat(int line, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineFromBandFloat(line & offset, band);
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} |
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public double[] getLineFromBandDouble(int line, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getLineFromBandDouble(line & offset, band);
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} |
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|
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//*********************************************************
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public byte getElemByte(int line, int col, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getElemByte(line & offset, col, band);
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} |
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public short getElemShort(int line, int col, int band) { |
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int pag = line >> bitsPag;
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if(pag != loadedPage)
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loadPage(pag); |
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return page.getElemShort(line & offset, col, band);
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} |
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|
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public int getElemInt(int line, int col, int band) { |
| 450 |
int pag = line >> bitsPag;
|
| 451 |
if(pag != loadedPage)
|
| 452 |
loadPage(pag); |
| 453 |
return page.getElemInt(line & offset, col, band);
|
| 454 |
} |
| 455 |
|
| 456 |
public float getElemFloat(int line, int col, int band) { |
| 457 |
int pag = line >> bitsPag;
|
| 458 |
if(pag != loadedPage)
|
| 459 |
loadPage(pag); |
| 460 |
return page.getElemFloat(line & offset, col, band);
|
| 461 |
} |
| 462 |
|
| 463 |
public double getElemDouble(int line, int col, int band) { |
| 464 |
int pag = line >> bitsPag;
|
| 465 |
if(pag != loadedPage)
|
| 466 |
loadPage(pag); |
| 467 |
return page.getElemDouble(line & offset, col, band);
|
| 468 |
} |
| 469 |
|
| 470 |
//*********************************************************
|
| 471 |
|
| 472 |
public void getElemByte(int line, int col, byte[] data) { |
| 473 |
int pag = line >> bitsPag;
|
| 474 |
if(pag != loadedPage)
|
| 475 |
loadPage(pag); |
| 476 |
page.getElemByte(line & offset, col, data); |
| 477 |
} |
| 478 |
|
| 479 |
public void getElemShort(int line, int col, short[] data) { |
| 480 |
int pag = line >> bitsPag;
|
| 481 |
if(pag != loadedPage)
|
| 482 |
loadPage(pag); |
| 483 |
page.getElemShort(line & offset, col, data); |
| 484 |
} |
| 485 |
|
| 486 |
public void getElemInt(int line, int col, int[] data) { |
| 487 |
int pag = line >> bitsPag;
|
| 488 |
if(pag != loadedPage)
|
| 489 |
loadPage(pag); |
| 490 |
page.getElemInt(line & offset, col, data); |
| 491 |
} |
| 492 |
|
| 493 |
public void getElemFloat(int line, int col, float[] data) { |
| 494 |
int pag = line >> bitsPag;
|
| 495 |
if(pag != loadedPage)
|
| 496 |
loadPage(pag); |
| 497 |
page.getElemFloat(line & offset, col, data); |
| 498 |
} |
| 499 |
|
| 500 |
public void getElemDouble(int line, int col, double[] data) { |
| 501 |
int pag = line >> bitsPag;
|
| 502 |
if(pag != loadedPage)
|
| 503 |
loadPage(pag); |
| 504 |
page.getElemDouble(line & offset, col, data); |
| 505 |
} |
| 506 |
|
| 507 |
//***********************************************
|
| 508 |
//Obtiene una banda entera
|
| 509 |
|
| 510 |
public Band getBand(int band){ |
| 511 |
return null; |
| 512 |
} |
| 513 |
|
| 514 |
public Buffer getBandBuffer(int Band){ |
| 515 |
return null; |
| 516 |
} |
| 517 |
|
| 518 |
public void replicateBand(int orig, int dest) { |
| 519 |
} |
| 520 |
|
| 521 |
public void switchBands(int[] bandPosition){ |
| 522 |
|
| 523 |
} |
| 524 |
|
| 525 |
//*********************************************************
|
| 526 |
|
| 527 |
public Buffer cloneBuffer(){ |
| 528 |
return null; |
| 529 |
} |
| 530 |
|
| 531 |
public void mallocOneBand(int dataType, int width, int height, int band) { |
| 532 |
|
| 533 |
} |
| 534 |
|
| 535 |
public void copyBand(int nBand, Band band) { |
| 536 |
|
| 537 |
} |
| 538 |
|
| 539 |
public void assignBand(int nBand, Band band) { |
| 540 |
|
| 541 |
} |
| 542 |
|
| 543 |
public Band createBand(byte defaultValue) { |
| 544 |
|
| 545 |
return null; |
| 546 |
} |
| 547 |
|
| 548 |
public void assignBandToNotValid(int Band) {} |
| 549 |
public void assign(int band, byte value) {} |
| 550 |
public void assign(int band, short value) {} |
| 551 |
public void assign(int band, int value) {} |
| 552 |
public void assign(int band, float value) {} |
| 553 |
public void assign(int band, double value) {} |
| 554 |
public void interchangeBands(int band1, int band2) {} |
| 555 |
public void setElem(int line, int col, int band, byte data) {} |
| 556 |
public void setElem(int line, int col, int band, short data) {} |
| 557 |
public void setElem(int line, int col, int band, int data) {} |
| 558 |
public void setElem(int line, int col, int band, float data) {} |
| 559 |
public void setElem(int line, int col, int band, double data) {} |
| 560 |
public void setElemByte(int line, int col, byte[] data) {} |
| 561 |
public void setElemDouble(int line, int col, double[] data) {} |
| 562 |
public void setElemFloat(int line, int col, float[] data) {} |
| 563 |
public void setElemInt(int line, int col, int[] data) {} |
| 564 |
public void setElemShort(int line, int col, short[] data) {} |
| 565 |
public void setLineByte(byte[][] data, int line) {} |
| 566 |
public void setLineDouble(double[][] data, int line) {} |
| 567 |
public void setLineFloat(float[][] data, int line) {} |
| 568 |
public void setLineInBandByte(byte[] data, int line, int band) {} |
| 569 |
public void setLineInBandDouble(double[] data, int line, int band) {} |
| 570 |
public void setLineInBandFloat(float[] data, int line, int band) {} |
| 571 |
public void setLineInBandInt(int[] data, int line, int band) {} |
| 572 |
public void setLineInBandShort(short[] data, int line, int band) {} |
| 573 |
public void setLineInt(int[][] data, int line) {} |
| 574 |
public void setLineShort(short[][] data, int line) {} |
| 575 |
|
| 576 |
public boolean isReadOnlyBuffer() { |
| 577 |
return true; |
| 578 |
} |
| 579 |
|
| 580 |
public boolean isCached() { |
| 581 |
return true; |
| 582 |
} |
| 583 |
|
| 584 |
public int getBlockHeight() { |
| 585 |
return RasterLibrary.blockHeight;
|
| 586 |
} |
| 587 |
|
| 588 |
public void dispose() { |
| 589 |
if(page != null) { |
| 590 |
page.dispose(); |
| 591 |
} |
| 592 |
if(secondPage != null) { |
| 593 |
secondPage.dispose(); |
| 594 |
} |
| 595 |
try {
|
| 596 |
finalize(); |
| 597 |
} catch (Throwable e) { |
| 598 |
} |
| 599 |
} |
| 600 |
|
| 601 |
protected void finalize() throws Throwable { |
| 602 |
page = null;
|
| 603 |
secondPage = null;
|
| 604 |
query = null;
|
| 605 |
drawableBands = null;
|
| 606 |
bandList = null;
|
| 607 |
datasource = null;
|
| 608 |
super.finalize();
|
| 609 |
} |
| 610 |
} |