root / trunk / extensions / extGeoProcessing / src / com / iver / gvsig / geoprocessing / impl / convexhull / ConvexHullGeoprocess.java @ 4447
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/*
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* Created on 16-feb-2006
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*
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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) 2004 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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* 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 Ib??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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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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/* CVS MESSAGES:
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*
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* $Id: ConvexHullGeoprocess.java 4447 2006-03-15 18:35:56Z azabala $
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* $Log$
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* Revision 1.7 2006-03-15 18:31:06 azabala
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* *** empty log message ***
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*
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* Revision 1.6 2006/03/14 18:32:46 fjp
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* Cambio con LayerDefinition para que sea compatible con la definici?n de tablas tambi?n.
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*
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* Revision 1.5 2006/03/07 21:01:33 azabala
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* *** empty log message ***
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*
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* Revision 1.4 2006/03/06 19:48:39 azabala
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* *** empty log message ***
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*
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* Revision 1.3 2006/03/05 19:57:25 azabala
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* *** empty log message ***
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*
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* Revision 1.2 2006/02/26 20:52:43 azabala
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* *** empty log message ***
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*
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* Revision 1.1 2006/02/17 16:32:20 azabala
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* *** empty log message ***
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*
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*
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*/
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package com.iver.gvsig.geoprocessing.impl.convexhull; |
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import java.util.Map; |
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import com.iver.cit.gvsig.fmap.DriverException; |
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import com.iver.cit.gvsig.fmap.core.IFeature; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.drivers.DriverIOException; |
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import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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import com.iver.cit.gvsig.fmap.drivers.ILayerDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.LayerDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.SHPLayerDefinition; |
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import com.iver.cit.gvsig.fmap.edition.DefaultRowEdited; |
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import com.iver.cit.gvsig.fmap.edition.EditionException; |
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import com.iver.cit.gvsig.fmap.layers.FBitSet; |
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import com.iver.cit.gvsig.fmap.layers.FLyrVect; |
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import com.iver.cit.gvsig.fmap.operations.CancellableMonitorable; |
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import com.iver.cit.gvsig.fmap.operations.DefaultCancellableMonitorable; |
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import com.iver.cit.gvsig.fmap.operations.strategies.Strategy; |
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import com.iver.cit.gvsig.fmap.operations.strategies.StrategyManager; |
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import com.iver.cit.gvsig.fmap.operations.strategies.VisitException; |
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import com.iver.gvsig.geoprocessing.impl.AbstractGeoprocess; |
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import com.iver.gvsig.geoprocessing.model.GeoprocessException; |
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import com.iver.gvsig.geoprocessing.model.IOneLayerGeoprocess; |
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import com.iver.gvsig.geoprocessing.schemabuilder.FeatureFactory; |
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import com.iver.gvsig.geoprocessing.schemabuilder.XTypes; |
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import com.iver.utiles.swing.threads.IMonitorableTask; |
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/**
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* Geoprocess that computes the convex hull of all geometries of the input
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* layer.
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*
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* @author azabala
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*
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*/
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public class ConvexHullGeoprocess extends AbstractGeoprocess implements |
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IOneLayerGeoprocess {
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/**
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* Schema of the result layer
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*/
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private LayerDefinition resultLayerDefinition;
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/**
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* Iterates over geometries computing convex hull.
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* TODO Comparative Memory
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* vs Scalable
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*/
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private ScalableConvexHullVisitor visitor;
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/**
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* If only consideer selection to compute convex hull
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*/
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private boolean convexSelection; |
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public ConvexHullGeoprocess() {
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visitor = new ScalableConvexHullVisitor();
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} |
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public void setParameters(Map params) throws GeoprocessException { |
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Boolean onlySelection = (Boolean) params.get("layer_selection"); |
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if (onlySelection != null) |
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convexSelection = onlySelection.booleanValue(); |
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} |
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public void checkPreconditions() throws GeoprocessException { |
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if (firstLayer == null) |
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throw new GeoprocessException( |
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"Convex Hull con capa de entrada a null");
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if (this.writer == null || this.schemaManager == null) { |
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throw new GeoprocessException( |
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"Operacion de convex hull sin especificar capa de resultados");
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} |
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} |
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public void process() throws GeoprocessException { |
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Strategy strategy = StrategyManager.getStrategy(firstLayer); |
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try {
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if (convexSelection) {
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strategy.process(visitor, firstLayer.getRecordset() |
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.getSelection()); |
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} else {
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strategy.process(visitor); |
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} |
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IGeometry convexHull = visitor.getConvexHull(); |
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Object[] attrs = new Object[1]; |
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attrs[0] = new Long(0); |
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IFeature feature = FeatureFactory.createFeature(attrs, convexHull, |
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resultLayerDefinition); |
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writer.preProcess(); |
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DefaultRowEdited editedFeature = new DefaultRowEdited(feature,
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DefaultRowEdited.STATUS_ADDED, 0);
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writer.process(editedFeature); |
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writer.postProcess(); |
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} catch (DriverException e) {
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throw new GeoprocessException( |
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"Problemas con el driver calculando el convex hull");
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} catch (VisitException e) {
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throw new GeoprocessException( |
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"Problemas durante el proceso de calculo del convex hull");
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} catch (EditionException e) {
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throw new GeoprocessException( |
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"Problemas al guardar la capa resultado del convex hull");
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} |
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} |
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public void cancel() { |
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// TODO Implementar la cancelacion
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//llamar a ISchemaManager.drop() para borrar la capa
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//resultado
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} |
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public ILayerDefinition createLayerDefinition() {
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if(resultLayerDefinition == null){ |
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resultLayerDefinition = new SHPLayerDefinition();
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resultLayerDefinition.setShapeType(XTypes.POLYGON); |
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FieldDescription[] fields = new FieldDescription[1]; |
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fields[0] = new FieldDescription(); |
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fields[0].setFieldLength(10); |
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fields[0].setFieldName("FID"); |
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fields[0].setFieldType(XTypes.BIGINT);
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resultLayerDefinition.setFieldsDesc(fields); |
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} |
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return resultLayerDefinition;
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} |
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public void setFirstOperand(FLyrVect firstLayer) { |
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this.firstLayer = firstLayer;
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} |
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public IMonitorableTask createTask() {
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try {
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return new ConvexHullMonitorableTask(); |
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} catch (DriverIOException e) {
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return null; |
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} |
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} |
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/**
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* IMonitorableTask that allows to run convex hull geoprocess in background,
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* with cancelation requests.
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*
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* @author azabala
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*
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*/
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class ConvexHullMonitorableTask implements IMonitorableTask { |
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private CancellableMonitorable cancelMonitor = null; |
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// FIXME INTERNACIONALIZAR ESTO
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String HULL_MESSAGE = "Computing convex hull:"; |
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private boolean finished = false; |
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ConvexHullMonitorableTask() throws DriverIOException{
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initialize(); |
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} |
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void initialize() throws DriverIOException { |
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cancelMonitor = createCancelMonitor(); |
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} |
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private CancellableMonitorable createCancelMonitor()
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throws DriverIOException {
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DefaultCancellableMonitorable monitor = new DefaultCancellableMonitorable();
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monitor.setInitialStep(0);
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monitor.setDeterminatedProcess(true);
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int numSteps = 0; |
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if (convexSelection) {
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FBitSet selection = firstLayer.getRecordset().getSelection(); |
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numSteps = selection.cardinality(); |
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} else {
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numSteps = firstLayer.getSource().getShapeCount(); |
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} |
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monitor.setFinalStep(numSteps); |
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return monitor;
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} |
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public int getInitialStep() { |
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return cancelMonitor.getInitialStep();
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} |
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public int getFinishStep() { |
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return cancelMonitor.getFinalStep();
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} |
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public int getCurrentStep() { |
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return cancelMonitor.getCurrentStep();
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} |
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public String getStatusMessage() { |
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// FIXME Cambiar esto por un mecanismo de eventos,
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// de forma que la tarea lo que tenga sea un escuchador
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// que cambie el mensaje de estado segun los eventos
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// de tareas que se est?n realizando
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return "Convex Hull Geoprocess..."; |
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} |
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public String getNote() { |
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// FIXME Cambiar esto por un mecanismo de eventos,
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// de forma que la tarea lo que tenga sea un escuchador
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// que cambie el mensaje de estado segun los eventos
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// de tareas que se est?n realizando
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return HULL_MESSAGE +
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getCurrentStep()+ |
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" de " +
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getFinishStep(); |
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} |
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public void cancel() { |
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((DefaultCancellableMonitorable) cancelMonitor).setCanceled(true);
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} |
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public void run() throws GeoprocessException { |
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Strategy strategy = StrategyManager.getStrategy(firstLayer); |
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try {
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if (convexSelection) {
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strategy.process(visitor, firstLayer.getRecordset() |
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.getSelection(), cancelMonitor); |
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} else {
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strategy.process(visitor, cancelMonitor); |
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} |
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IGeometry convexHull = visitor.getConvexHull(); |
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Object[] attrs = new Object[1]; |
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attrs[0] = new Long(0); |
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IFeature feature = FeatureFactory.createFeature(attrs, |
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convexHull, resultLayerDefinition); |
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writer.preProcess(); |
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DefaultRowEdited editedFeature = new DefaultRowEdited(feature,
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DefaultRowEdited.STATUS_ADDED, 0);
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writer.process(editedFeature); |
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writer.postProcess(); |
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} catch (DriverException e) {
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throw new GeoprocessException( |
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"Problemas con el driver calculando el convex hull");
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} catch (VisitException e) {
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throw new GeoprocessException( |
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"Problemas durante el proceso de calculo del convex hull");
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} catch (EditionException e) {
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throw new GeoprocessException( |
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"Problemas al guardar la capa resultado del convex hull");
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} |
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finished = true;
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} |
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public boolean isDefined() { |
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return cancelMonitor.isDeterminatedProcess();
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} |
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public boolean isCanceled() { |
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return cancelMonitor.isCanceled();
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} |
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public boolean isFinished() { |
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return finished;
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} |
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} |
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} |