svn-gvsig-desktop / trunk / extensions / extRemoteSensing / src / org / gvsig / remotesensing / gridmath / GridMathProcess.java @ 18579
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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 Instituto de Desarrollo Regional 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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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Iba?ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* Instituto de Desarrollo Regional (Universidad de Castilla La-Mancha)
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* Campus Universitario s/n
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* 02071 Alabacete
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* Spain
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*
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* +34 967 599 200
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*/
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package org.gvsig.remotesensing.gridmath; |
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import java.awt.geom.AffineTransform; |
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import java.io.File; |
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import java.io.IOException; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import org.gvsig.fmap.raster.layers.FLyrRasterSE; |
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import org.gvsig.gui.beans.incrementabletask.IncrementableEvent; |
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import org.gvsig.raster.RasterProcess; |
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import org.gvsig.raster.buffer.RasterBuffer; |
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import org.gvsig.raster.dataset.GeoRasterWriter; |
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import org.gvsig.raster.dataset.NotSupportedExtensionException; |
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import org.gvsig.raster.dataset.io.RasterDriverException; |
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import org.gvsig.raster.grid.GridExtent; |
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import org.gvsig.raster.process.CancelEvent; |
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import org.gvsig.raster.util.RasterToolsUtil; |
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import org.gvsig.rastertools.clipping.WriterBufferServer; |
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import org.nfunk.jep.JEP; |
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import org.nfunk.jep.Variable; |
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import com.iver.andami.PluginServices; |
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import com.iver.cit.gvsig.exceptions.layers.LoadLayerException; |
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import com.iver.cit.gvsig.fmap.MapContext; |
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import com.iver.cit.gvsig.fmap.layers.FLayer; |
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/**
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* GridMathProcess implenta la funcionalidad para el c?lculo de operaciones entre grids.
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* El proceso permite hacer operaciones matem?ticas entre los valores de las bandas de la misma imagen o entre
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* diferentes im?genes bajo ciertas restricciones espaciales (siempre sobre los datos originales).
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*
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* @author Alejandro Mu?oz Sanchez (alejandro.munoz@uclm.es)
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* @author Diego Guerrero Sevilla (diego.guerrero@uclm.es)
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* @version 19/10/2007
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*
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*/
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public class GridMathProcess extends RasterProcess{ |
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HashMap params = null; // Asignacion de variables a grids. |
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JEP parser = null;
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String expression = null; |
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GridExtent resultExtent = null;
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private WriterBufferServer writerBufferServer = null; |
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private int percent = 0; |
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private boolean cancel = false; |
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private MapContext mapContext = null; |
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private String filePath = null; |
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private AffineTransform aTransform = null; |
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private RasterBuffer rasterResult = null; |
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/**
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* Constructor
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*/
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public GridMathProcess(){
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parser = new JEP();
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parser.setAllowUndeclared(true);
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parser.addStandardFunctions(); |
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} |
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/**
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* @return HashMap con las variables asociadas a sus grid correspondientes
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* */
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public HashMap getParams() { |
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return params;
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} |
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/**
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* Asigna el params con las variables
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* @param params
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*/
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public void setParams(HashMap params) { |
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this.params = params;
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} |
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/**
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* Establece la expresi?n en el parser
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* @param expression expresion
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*/
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public void setExpression(String expression){ |
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this.expression = expression;
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parser.getSymbolTable().clear(); |
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parser.parseExpression(expression); |
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} |
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/**
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* @return expresi?n a evaluar
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*/
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public String getExpression() { |
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return expression;
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} |
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/**
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* @return true si en el parseo de la expresion hay error
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*/
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public boolean hasError(){ |
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if (parser!=null) |
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return parser.hasError();
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else
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return true; |
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} |
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/**
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* Escritura del resultado en disco.
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*/
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private void writeToFile(){ |
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try {
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writerBufferServer = new WriterBufferServer(rasterResult);
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aTransform = new AffineTransform(resultExtent.getCellSize(), 0.0, 0.0, -resultExtent.getCellSize(), resultExtent.getMin().getX(), resultExtent.getMax().getY()); |
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GeoRasterWriter grw = GeoRasterWriter.getWriter(writerBufferServer, filePath, rasterResult.getBandCount(), aTransform, resultExtent.getNX(), resultExtent.getNY(), rasterResult.getDataType(), GeoRasterWriter.getWriter(filePath).getParams(), mapContext.getProjection()); |
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grw.dataWrite(); |
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grw.writeClose(); |
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} catch (NotSupportedExtensionException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_writer_notsupportedextension"), this, e); |
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} catch (IOException e) { |
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_writer"), this, e); |
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} catch (InterruptedException e) { |
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Thread.currentThread().interrupt();
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} catch (RasterDriverException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this, "raster_buffer_invalid_extension"), this, e); |
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} |
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mapContext.beginAtomicEvent(); |
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FLayer lyr = null;
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int endIndex = filePath.lastIndexOf("."); |
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if (endIndex < 0) |
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endIndex = filePath.length(); |
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try {
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lyr = FLyrRasterSE.createLayer( |
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filePath.substring(filePath.lastIndexOf(File.separator) + 1, endIndex), |
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new File(filePath), |
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mapContext.getProjection()); |
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} catch (LoadLayerException e) {
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RasterToolsUtil.messageBoxError("error_cargar_capa", this, e); |
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} |
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mapContext.getLayers().addLayer(lyr); |
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mapContext.endAtomicEvent(); |
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mapContext.invalidate(); |
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mapContext.endAtomicEvent(); |
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} |
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/**
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* @return extent del resultado
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*/
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public GridExtent getResultExtent() {
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return resultExtent;
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} |
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/**
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* Asignaci?n del extent
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* @param resultExtent
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*/
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public void setResultExtent(GridExtent resultExtent) { |
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this.resultExtent = resultExtent;
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getLabel()
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*/
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public String getLabel() { |
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return PluginServices.getText(this,"procesando"); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getLog()
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*/
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public String getLog() { |
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if (writerBufferServer==null) |
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return PluginServices.getText(this,"calculando_imagen")+"..."; |
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else
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return PluginServices.getText(this,"escribiendo_resultado")+"..."; |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getPercent()
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*/
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public int getPercent() { |
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if (writerBufferServer==null) |
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return percent;
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else
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return writerBufferServer.getPercent();
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#getTitle()
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*/
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public String getTitle() { |
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return PluginServices.getText(this,"band_math"); |
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} |
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/*
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* (non-Javadoc)
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* @see org.gvsig.gui.beans.incrementabletask.IIncrementable#actionCanceled
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*/
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public void actionCanceled(IncrementableEvent e) { |
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if(writerBufferServer != null) |
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rasterTask.setEvent(new CancelEvent(this)); |
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cancel = true;
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} |
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public void init() { |
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expression= getStringParam("expresion");
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setExpression(expression); |
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params= (HashMap )getParam("params"); |
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resultExtent= (GridExtent) getParam("extent");
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mapContext= (MapContext)getParam("mapcontext");
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filePath= getStringParam("filepath");
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} |
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public void process() throws InterruptedException { |
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RasterBuffer inputBuffer=null;
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/*
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Comprobar que todas las variables que intervienen en la expresion
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estan en el HasMap de parametros.
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*/
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for (Iterator iter = parser.getSymbolTable().values().iterator(); iter.hasNext();) { |
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Variable variable = (Variable) iter.next(); |
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if (!params.containsKey(variable.getName()))
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try {
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throw new NoAssignedVarsException(); |
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} catch (NoAssignedVarsException e) {
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RasterToolsUtil.messageBoxError(PluginServices.getText(this,"variables_sin_asignar"),this); |
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} |
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} |
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// Construccion del rasterbuffer que recoge el resultado del calculo
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rasterResult = RasterBuffer.getBuffer(RasterBuffer.TYPE_DOUBLE, resultExtent.getNX() ,resultExtent.getNY(), 1, true); |
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// Calculo de grid resultante
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int iNX = resultExtent.getNX();
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int iNY = resultExtent.getNY();
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// Calculo de grid resultante
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for (int x=0;x<iNX;x++){ |
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if (cancel) return; //Proceso cancelado |
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for(int y=0;y<iNY;y++){ |
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int i=0; |
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for (Iterator iter = params.keySet().iterator(); iter.hasNext();) { |
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String varName = (String)iter.next(); |
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Object data[]= (Object[])params.get(varName); |
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inputBuffer= (RasterBuffer)data[0];
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int dataType= ((Integer)data[1]).intValue(); |
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double value=0; |
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// BUFFER TIPO_BYTE
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if(dataType == RasterBuffer.TYPE_BYTE){
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value = inputBuffer.getElemByte(y, x, 0);
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if(value!=inputBuffer.getNoDataValue()){
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parser.setVarValue(varName,new Double(value)); |
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i++; |
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} |
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else{
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rasterResult.setElem(y, x, 0, rasterResult.noDataValue);
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break;
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} |
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} |
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// BUFFER TIPO_SHORT
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else if(dataType== RasterBuffer.TYPE_SHORT){ |
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value = inputBuffer.getElemShort(y, x, 0);
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if(value!=inputBuffer.getNoDataValue()){
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parser.setVarValue(varName,new Double(value)); |
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i++; |
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} |
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else{
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rasterResult.setElem(y, x, 0, rasterResult.noDataValue);
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break;
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} |
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} |
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// BUFFER TIPO_INT
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else if(dataType == RasterBuffer.TYPE_INT){ |
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value = inputBuffer.getElemInt(y, x,0);
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if(value!=inputBuffer.getNoDataValue()){
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parser.setVarValue(varName,new Double(value)); |
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i++; |
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} |
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else{
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rasterResult.setElem(y, x, 0, rasterResult.noDataValue);
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break;
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} |
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} |
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// BUFFER TIPO_FLOAT
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else if(dataType == RasterBuffer.TYPE_FLOAT){ |
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value = inputBuffer.getElemFloat(x, y,0);
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if(value!=inputBuffer.getNoDataValue()){
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parser.setVarValue(varName,new Double(value)); |
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i++; |
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} |
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else{
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rasterResult.setElem(y, x, 0, rasterResult.noDataValue);
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break;
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} |
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} |
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// BUFFER TIPO_DOUBLE
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else if(dataType == RasterBuffer.TYPE_DOUBLE){ |
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value = inputBuffer.getElemDouble(y, x,0);
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if(value!=inputBuffer.getNoDataValue()){
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parser.setVarValue(varName,new Double(value)); |
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i++; |
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} |
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else{
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rasterResult.setElem(y, x, 0, rasterResult.noDataValue);
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break;
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} |
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} |
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} |
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// Evaluacion de la exprsion en el x,y.
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if (i == params.size()){
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rasterResult.setElem(y, x, 0, (double)parser.getValue()); |
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percent = x*100/rasterResult.getWidth();
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} |
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} |
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} |
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// Escritura de los datos a disco
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writeToFile(); |
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} |
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} |