root / trunk / extensions / extGeoProcessing / src / com / iver / gvsig / geoprocessing / impl / clip / ClipGeoprocess.java @ 4447
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/*
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* Created on 14-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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* $Id: ClipGeoprocess.java 4447 2006-03-15 18:35:56Z azabala $
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* $Log$
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* Revision 1.8 2006-03-15 18:30:39 azabala
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* *** empty log message ***
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*
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* Revision 1.7 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 1.6 2006/03/07 21:01:33 azabala
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* *** empty log message ***
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*
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* Revision 1.5 2006/03/06 19:48:39 azabala
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* *** empty log message ***
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*
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* Revision 1.4 2006/03/05 19:57:14 azabala
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* *** empty log message ***
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*
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* Revision 1.3 2006/02/19 20:56:32 azabala
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* *** empty log message ***
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*
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* Revision 1.2 2006/02/17 19:25:28 azabala
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* *** empty log message ***
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*
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* Revision 1.1 2006/02/17 16:31:58 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.clip; |
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import java.util.Map; |
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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.ILayerDefinition; |
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import com.iver.cit.gvsig.fmap.drivers.ITableDefinition; |
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import com.iver.cit.gvsig.fmap.edition.ISchemaManager; |
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import com.iver.cit.gvsig.fmap.edition.IWriter; |
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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.impl.convexhull.ScalableUnionVisitor; |
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import com.iver.gvsig.geoprocessing.model.GeoprocessException; |
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import com.iver.gvsig.geoprocessing.model.IOverlayGeoprocess; |
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import com.iver.gvsig.geoprocessing.schemabuilder.DefinitionUtils; |
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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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import com.vividsolutions.jts.geom.Geometry; |
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/**
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* A clip between two layers is the intersection of the first layer with the
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* convex hull of the second layer.
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*
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* It is an individual case of OverlayGeoprocess. When we would have piped
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* geoprocesses, we could model it like a pipe of a ConvexHull geoprocess and an
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* intersection geoprocess.
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*
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* @author azabala
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*
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*/
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public class ClipGeoprocess extends AbstractGeoprocess implements |
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IOverlayGeoprocess {
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/**
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* overlay layer
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*/
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private FLyrVect overlayLayer;
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/**
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* Schema of the result layer
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*/
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private ILayerDefinition resultLayerDefinition;
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/**
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* flag to only clip selection of input layer
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*/
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private boolean onlyFirstLayerSelection = false; |
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/**
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* flag to only clip with selection of clipping layer
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*/
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private boolean onlyClipLayerSelection = false; |
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/**
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* processes input layer's features to clip its geometries with clipping
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* layer bounding box
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*/
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private ClipVisitor visitor;
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/**
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* Constructor
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*
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*/
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public ClipGeoprocess(FLyrVect inputLayer) {
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setFirstOperand(inputLayer); |
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} |
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public void setSecondOperand(FLyrVect secondLayer) { |
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this.overlayLayer = secondLayer;
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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 void setParameters(Map params) throws GeoprocessException { |
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Boolean firstLayerSelection = (Boolean) params |
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.get("firstlayerselection");
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if (firstLayerSelection != null) |
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this.onlyFirstLayerSelection = firstLayerSelection.booleanValue();
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Boolean secondLayerSelection = (Boolean) params |
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.get("secondlayerselection");
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if (secondLayerSelection != null) |
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this.onlyClipLayerSelection = secondLayerSelection.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("Clip: capa de entrada a null"); |
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if (overlayLayer == null) |
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throw new GeoprocessException("Clip: capa de clip 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 clip sin especificar capa de resultados");
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} |
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try {
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if (overlayLayer.getShapeType() != XTypes.POLYGON) {
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throw new GeoprocessException( |
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"La capa de recorte no es de pol?gonos");
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} |
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} catch (com.iver.cit.gvsig.fmap.DriverException e) {
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throw new GeoprocessException( |
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"Error al tratar de chequear si la capa de recorte es de pol?gonos");
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} |
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} |
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public void process() throws GeoprocessException { |
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Geometry clippingGeometry = null;
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try {
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clippingGeometry = computeJtsClippingPoly(null);
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} catch (Exception e) { |
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throw new GeoprocessException( |
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"Error calculando el convex hull de la clipping layer");
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} |
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visitor = new ClipVisitor(clippingGeometry, resultLayerDefinition,
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schemaManager, writer); |
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Strategy strategy = StrategyManager.getStrategy(firstLayer); |
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try {
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if (onlyFirstLayerSelection) {
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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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} catch (Exception e) { |
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throw new GeoprocessException( |
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"Problemas al leer los datos de la capa a clipear");
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} |
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} |
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public void cancel() { |
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// TODO Auto-generated method stub
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} |
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public void setResultLayerProperties(IWriter writer, |
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ISchemaManager schemaManager) {
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this.writer = writer;
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this.schemaManager = schemaManager;
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} |
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public ILayerDefinition createLayerDefinition() {
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//result layer definition will be the same that
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//input layer
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if(resultLayerDefinition == null){ |
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try {
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resultLayerDefinition = DefinitionUtils |
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.createLayerDefinition(firstLayer); |
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} catch (Exception e) { |
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// TODO Quizas createLayerDefinition deberia lanzar
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// una excepcion
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e.printStackTrace(); |
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} |
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} |
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return resultLayerDefinition;
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} |
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/**
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* Computes union of all geometries of the clipping layer
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*
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* @param cancel
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* monitors cancellations and progress of clipping polygon
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* computation.
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* @return
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* @throws com.iver.cit.gvsig.fmap.DriverException
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* @throws VisitException
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*/
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private Geometry computeJtsClippingPoly(CancellableMonitorable cancel)
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throws com.iver.cit.gvsig.fmap.DriverException, VisitException {
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ScalableUnionVisitor visitor = new ScalableUnionVisitor();
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Strategy strategy = StrategyManager.getStrategy(overlayLayer); |
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if (onlyClipLayerSelection) {
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strategy.process(visitor, overlayLayer.getRecordset() |
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.getSelection(), cancel); |
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} else {
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strategy.process(visitor, cancel); |
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} |
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return visitor.getJtsConvexHull();
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} |
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public FBitSet getOverlays(IGeometry firstLayerGeometry, int index) { |
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// TODO Auto-generated method stub
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return null; |
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} |
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public IFeature[] computeIntersection(IGeometry firsLayerGeometry, |
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int firstLayerFeatureIndex, IGeometry secondLayerGeometry,
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int secondLayerFeatureIndex) {
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// TODO Auto-generated method stub
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return null; |
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} |
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public IMonitorableTask createTask() {
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final CancellableMonitorable cancelMonitor =
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createCancelMonitor(); |
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return new IMonitorableTask() { |
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String CLIP_MESSAGE = "Computing clip polygon: "; |
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String INTERS_MESSAGE = "Clipping geometries: "; |
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String currentMsg = CLIP_MESSAGE;
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private boolean finished = false; |
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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 "Clip 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 currentMsg +
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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) |
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.setCanceled(true);
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} |
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public void run() { |
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Geometry clippingGeometry = null;
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try {
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clippingGeometry = computeJtsClippingPoly(cancelMonitor); |
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} catch (Exception e) { |
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//FIXME Ver que pasa con las excepciones que
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//que pueda lanzar un ITask
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} |
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currentMsg = INTERS_MESSAGE; |
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visitor = new ClipVisitor(clippingGeometry, resultLayerDefinition,
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schemaManager, writer); |
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Strategy strategy = StrategyManager.getStrategy(firstLayer); |
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try {
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if (onlyFirstLayerSelection) {
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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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} catch (Exception e) { |
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//FIXME Ver que pasa con las excepciones de las ITask
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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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} |
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private DefaultCancellableMonitorable createCancelMonitor() {
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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 clipSteps = 0; |
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if (onlyClipLayerSelection){
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FBitSet selection = overlayLayer.getRecordset().getSelection(); |
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clipSteps = selection.cardinality(); |
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}else{
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try {
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clipSteps = overlayLayer.getSource().getShapeCount(); |
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} catch (DriverIOException e) {
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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} |
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int firstSteps = 0; |
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if (onlyFirstLayerSelection) {
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FBitSet selection = firstLayer.getRecordset().getSelection(); |
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firstSteps = selection.cardinality(); |
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} else {
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try {
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firstSteps = firstLayer.getSource() |
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.getShapeCount(); |
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} catch (DriverIOException e) {
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e.printStackTrace(); |
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} |
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} |
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int totalSteps = clipSteps + firstSteps;
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monitor.setFinalStep(totalSteps); |
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return monitor;
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} |
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} |