root / trunk / extensions / extGeoProcessing / src / com / iver / cit / gvsig / geoprocess / dissolve / fmap / FeatureDissolver.java @ 5628
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/*
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* Created on 12-may-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: FeatureDissolver.java 5628 2006-06-02 18:21:28Z azabala $
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* $Log$
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* Revision 1.2 2006-06-02 18:21:28 azabala
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* *** empty log message ***
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*
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* Revision 1.1 2006/05/24 21:11:14 azabala
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* primera version en cvs despues de refactoring orientado a crear un framework extensible de geoprocessing
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*
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*
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*/
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package com.iver.cit.gvsig.geoprocess.dissolve.fmap; |
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import java.awt.geom.Rectangle2D; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.Enumeration; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Stack; |
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import org.cresques.cts.ICoordTrans; |
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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.core.v02.FConverter; |
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import com.iver.cit.gvsig.fmap.drivers.DriverIOException; |
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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.FLayer; |
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import com.iver.cit.gvsig.fmap.layers.FLyrVect; |
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import com.iver.cit.gvsig.fmap.layers.ReadableVectorial; |
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import com.iver.cit.gvsig.fmap.layers.SelectableDataSource; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.AlphanumericData; |
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import com.iver.cit.gvsig.fmap.layers.layerOperations.VectorialData; |
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import com.iver.cit.gvsig.fmap.operations.strategies.FeatureVisitor; |
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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.cit.gvsig.geoprocess.core.fmap.FeatureProcessor; |
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import com.iver.cit.gvsig.geoprocess.core.fmap.GeoprocessException; |
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import com.iver.utiles.swing.threads.Cancellable; |
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import com.iver.utiles.swing.threads.CancellableMonitorable; |
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import com.vividsolutions.jts.geom.Geometry; |
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import com.vividsolutions.jts.geom.GeometryCollection; |
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import com.vividsolutions.jts.geom.GeometryFactory; |
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/**
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* <p>
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* Dissolve features in base of a given dissolve criteria.
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* </p>
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* By 'dissolving' we understand the union of the geometry of many features
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*
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* @author azabala
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*
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*/
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public class FeatureDissolver { |
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public static final int ALPHANUMERIC_DISSOLVE = 0; |
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public static final int SPATIAL_DISSOLVE = 1; |
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private int dissolveType = ALPHANUMERIC_DISSOLVE; |
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/**
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* Fetches attributes of disolved layer features
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*/
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protected SelectableDataSource recordset;
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protected ICoordTrans ct;
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/**
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* Is used to do spatial querys (looking for adjacent polygons to visited
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* feature geometry
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*/
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protected FLyrVect dissolvedLayer;
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/**
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* It marks all features that have already been dissolved (to avoid process
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* them in subsecuent steps)
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*
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*/
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protected FBitSet dissolvedGeometries;
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/**
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* Relates a numerical field name with its sumarization functions
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*/
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protected Map numericField_sumarizeFunction; |
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/**
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* Processes results of dissolve operations (save them in a file, or cache
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* them in memory, etc)
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*/
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protected FeatureProcessor featureProcessor;
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/**
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* Index of the result
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*/
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protected int fid = 0; |
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/**
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* It decides if two features must be dissolved, and builds the feature
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* resulting of the dissolution
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*/
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protected IDissolveCriteria dissolveCriteria;
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/**
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*
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* @param processor
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* @param layer
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* @throws GeoprocessException
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*/
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public FeatureDissolver(FeatureProcessor processor, FLyrVect layer,
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Map numericField_sumFunction, IDissolveCriteria criteria, int dissolveType) |
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throws GeoprocessException {
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this.featureProcessor = processor;
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this.numericField_sumarizeFunction = numericField_sumFunction;
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this.dissolveCriteria = criteria;
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this.dissolveType = dissolveType;
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dissolvedGeometries = new FBitSet();
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if (layer instanceof AlphanumericData && layer instanceof VectorialData) { |
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try {
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dissolvedLayer = (FLyrVect) layer; |
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recordset = ((AlphanumericData) layer).getRecordset(); |
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ct = dissolvedLayer.getCoordTrans(); |
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featureProcessor.start(); |
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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 acceder al recordset de la capa "
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+ layer.getName(), e); |
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} catch (EditionException e) {
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throw new GeoprocessException( |
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"Error al preparar donde se van a escribir los resultados del dissolve de la capa "
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+ layer.getName(), e); |
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} |
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} else {
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throw new GeoprocessException( |
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"La capa a dissolver debe ser VectorialData y AlphanumericData");
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} |
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} |
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public void setDissolveCriteria(IDissolveCriteria criteria) { |
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this.dissolveCriteria = criteria;
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} |
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public void setDissolvedAttributesInfo(Map numericField_sumFunction) { |
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this.numericField_sumarizeFunction = numericField_sumFunction;
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} |
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public int getNumProcessedGeometries() { |
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return dissolvedGeometries.cardinality();
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} |
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public void dissolve(CancellableMonitorable cancel) throws GeoprocessException { |
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try {
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ReadableVectorial va = dissolvedLayer.getSource(); |
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va.start(); |
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for (int i = 0; i < va.getShapeCount(); i++) {// for each geometry |
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// if (cancel != null) {
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// cancel.reportStep();
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// }
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if (verifyCancelation(cancel, va)) {
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this.featureProcessor.finish();
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return;
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} |
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//Ver si podemos optimizar esto de forma que solo
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//se procesasen los elementos no marcados en el bitset
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//(bitset de acceso aleatorio)
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if (!dissolvedGeometries.get(i)) {
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System.out.println("dissolviendo "+i); |
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// if we havent processed this element yet
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try {
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if(dissolveType == SPATIAL_DISSOLVE)
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process( i, va, cancel); |
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else if(dissolveType == ALPHANUMERIC_DISSOLVE) |
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processAlphanumeric(i, va, cancel); |
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} catch (DriverException e) {
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throw new GeoprocessException( |
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"Error accediendo a datos durante dissolve", e);
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} catch (VisitException e) {
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throw new GeoprocessException( |
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"Error procesando datos durante dissolve", e);
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} catch (IOException e) { |
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throw new GeoprocessException( |
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"Error de I/O durante dissolve", e);
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} |
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}// if
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}// for
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va.stop(); |
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this.featureProcessor.finish();
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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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/**
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* Verifies cancelation events, and return a boolean flag if processes must
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* be stopped for this cancelations events.
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*
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* @param cancel
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* @param va
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* @param visitor
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* @return
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* @throws DriverIOException
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*/
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protected boolean verifyCancelation(Cancellable cancel, ReadableVectorial va) { |
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if (cancel != null) { |
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if (cancel.isCanceled()) {
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try {
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va.stop(); |
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} finally {
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return true; |
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} |
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} |
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} |
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return false; |
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} |
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class DissolveVisitor implements FeatureVisitor { |
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IDissolveCriteria criteria; |
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int index1;
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Stack stack;
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List geometries;
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ReadableVectorial va; |
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FunctionSummarizer sumarizer; |
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CancellableMonitorable cancel; |
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DissolveVisitor(IDissolveCriteria criteria, int index1, Stack stack, |
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List geometries, ReadableVectorial va,
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FunctionSummarizer sumarizer, CancellableMonitorable cancel) {
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this.criteria = criteria;
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this.index1 = index1;
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this.stack = stack;
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this.geometries = geometries;
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this.va = va;
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this.sumarizer = sumarizer;
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this.cancel = cancel;
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} |
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public void visit(IGeometry g, int index2) throws VisitException { |
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if(g == null) |
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return;
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if (verifyCancelation(cancel, va)) {
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// TODO Revisar si hay problemas por llamar a finish
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// varias veces
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featureProcessor.finish(); |
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return;
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} |
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if(index1 == index2){
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//we dont want dissolve a feature with itself
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return;
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} |
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if (dissolvedGeometries.get(index2)) {
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// Esta geometria ya ha sido procesada
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return;
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} |
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if (criteria.verifyIfDissolve(index1, index2)) {
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//Redise?ar esto (es para que valga tanto para dissolves
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//espaciales como alfanum?ricos
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if(stack != null) |
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stack.push(new Integer(index2)); |
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try {
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if(criteria instanceof ISpatialDissolveCriteria){ |
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//Para ver el criterio de disolucion ya se ha
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//leido la geometria
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geometries.add( |
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((ISpatialDissolveCriteria)criteria). |
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getSecondGeometry().toJTSGeometry()); |
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}else{
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IGeometry g2 = va.getShape(index2); |
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if(ct != null) |
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g2.reProject(ct); |
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geometries.add(g2.toJTSGeometry()); |
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} |
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sumarizer.applySumarizeFunction(index2); |
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} catch (DriverIOException e) {
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throw new VisitException( |
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"Error durante lectura de geometria en dissolve", e);
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} catch (com.hardcode.gdbms.engine.data.driver.DriverException e) {
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throw new VisitException( |
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"Error durante lectura de geometria en dissolve", e);
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} |
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//Esto se debe hacer externamente
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if(stack == null) |
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dissolvedGeometries.set(index2); |
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} |
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}// visit
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public String getProcessDescription() { |
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return ""; |
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} |
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public void stop(FLayer layer) { |
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} |
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public boolean start(FLayer layer) { |
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return true; |
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} |
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} |
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/**
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* @param index1
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* @param va
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* @param cancel
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* @throws DriverException
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* @throws VisitException
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* @throws IOException
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* @throws DriverIOException
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*/
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public void processAlphanumeric(int index1, |
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ReadableVectorial va, |
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CancellableMonitorable cancel) |
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throws DriverException, VisitException, IOException, |
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DriverIOException{
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dissolvedGeometries.set(index1); |
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Strategy strategy = StrategyManager.getStrategy(dissolvedLayer); |
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ArrayList geometries = new ArrayList(); |
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//we add the 'seed' feature geometry
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IGeometry g1 = va.getShape(index1); |
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if(g1 == null) |
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return;
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if(ct != null) |
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g1.reProject(ct); |
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geometries.add(g1.toJTSGeometry()); |
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if(dissolveCriteria instanceof ISpatialDissolveCriteria){ |
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((ISpatialDissolveCriteria)dissolveCriteria).setCoordTrans(ct); |
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((ISpatialDissolveCriteria)dissolveCriteria).setFirstGeometry(g1); |
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} |
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FunctionSummarizer sumarizer = new FunctionSummarizer(
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numericField_sumarizeFunction, recordset); |
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DissolveVisitor visitor = new DissolveVisitor(dissolveCriteria, index1, null, |
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geometries, va, sumarizer, cancel); |
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strategy.process(visitor); |
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IGeometry newGeometry = FConverter.jts_to_igeometry(union2(geometries)); |
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List sumarizedValues = sumarizer.getValues();
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IFeature dissolvedFeature = null;
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if(sumarizedValues != null || sumarizedValues.size() != 0){ |
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dissolvedFeature = dissolveCriteria. |
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getFeatureBuilder(). |
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createFeature(newGeometry, |
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sumarizedValues, |
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fid, |
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index1); |
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}else{
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dissolvedFeature = dissolveCriteria. |
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getFeatureBuilder(). |
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createFeature(newGeometry, |
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index1, |
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fid); |
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} |
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fid++; |
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featureProcessor.processFeature(dissolvedFeature); |
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dissolveCriteria.clear(); |
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} |
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class SpatialDissolveVisitor implements FeatureVisitor { |
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IDissolveCriteria criteria; |
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Geometry geom1; |
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StackEntry entry1; |
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Stack stack;
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List geometries;
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ReadableVectorial va; |
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FunctionSummarizer sumarizer; |
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CancellableMonitorable cancel; |
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SpatialDissolveVisitor(IDissolveCriteria criteria, Geometry geo1, StackEntry entry1, |
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Stack stack,
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List geometries, ReadableVectorial va,
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FunctionSummarizer sumarizer, CancellableMonitorable cancel) {
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this.criteria = criteria;
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this.geom1 = geo1;
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this.entry1 = entry1;
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this.stack = stack;
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this.geometries = geometries;
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this.va = va;
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this.sumarizer = sumarizer;
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this.cancel = cancel;
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} |
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void setSeed(StackEntry entry, Geometry jtsGeo){
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this.entry1 = entry;
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this.geom1 = jtsGeo;
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} |
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public void visit(IGeometry g, int index2) throws VisitException { |
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if(g == null) |
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return;
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if (verifyCancelation(cancel, va)) {
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// TODO Revisar si hay problemas por llamar a finish
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// varias veces
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featureProcessor.finish(); |
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return;
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} |
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if(entry1.index == index2){
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//we dont want dissolve a feature with itself
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return;
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} |
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if (dissolvedGeometries.get(index2)) {
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// Esta geometria ya ha sido procesada
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return;
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} |
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if(criteria instanceof ISpatialDissolveCriteria){ |
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((ISpatialDissolveCriteria)criteria).setSecondGeometry(g); |
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} |
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if (criteria.verifyIfDissolve(entry1.index, index2)) {
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StackEntry entry2 = new StackEntry();
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entry2.g = g; |
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entry2.index = index2; |
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stack.push(entry2); |
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System.out.println("Anado "+index2+ " al stack"); |
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dumpStack(stack); |
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if(criteria instanceof ISpatialDissolveCriteria) |
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{
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ISpatialDissolveCriteria c = (ISpatialDissolveCriteria)criteria; |
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geometries.add(c.getSecondJts()); |
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}else
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geometries.add(g.toJTSGeometry()); |
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try {
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sumarizer.applySumarizeFunction(index2); |
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} catch (com.hardcode.gdbms.engine.data.driver.DriverException e) {
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throw new VisitException("Error al aplicar la funcion de sumarizacion en dissolve", e); |
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} |
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dissolvedGeometries.set(index2); |
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} |
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}// visit
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|
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public String getProcessDescription() { |
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return ""; |
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} |
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|
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public void stop(FLayer layer) { |
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} |
| 495 |
|
| 496 |
public boolean start(FLayer layer) { |
| 497 |
return true; |
| 498 |
} |
| 499 |
} |
| 500 |
|
| 501 |
class StackEntry{ |
| 502 |
public IGeometry g;
|
| 503 |
public int index; |
| 504 |
} |
| 505 |
/**
|
| 506 |
* Processes the given feature looking for features to dissolve with. The
|
| 507 |
* criteria to decide if dissolve two features is given by
|
| 508 |
* IDissolveCriteria.
|
| 509 |
*
|
| 510 |
* @param criteria
|
| 511 |
* decides if dissolve two features
|
| 512 |
* @param index1
|
| 513 |
* index of feature we are processing
|
| 514 |
* @param va
|
| 515 |
* it reads geometry of features
|
| 516 |
* @param cancel
|
| 517 |
* listen cancelations
|
| 518 |
* @throws VisitException
|
| 519 |
* @throws DriverException
|
| 520 |
* @throws IOException
|
| 521 |
* @throws DriverIOException
|
| 522 |
*/
|
| 523 |
public void process(int index1, |
| 524 |
ReadableVectorial va, |
| 525 |
CancellableMonitorable cancel) |
| 526 |
throws DriverException, VisitException, IOException, |
| 527 |
DriverIOException {
|
| 528 |
|
| 529 |
if(dissolvedGeometries.get(index1))
|
| 530 |
return;
|
| 531 |
Strategy strategy = StrategyManager.getStrategy(dissolvedLayer); |
| 532 |
IGeometry g1 = va.getShape(index1); |
| 533 |
if(g1 == null) |
| 534 |
return;
|
| 535 |
if(ct != null) |
| 536 |
g1.reProject(ct); |
| 537 |
StackEntry entry = new StackEntry();
|
| 538 |
entry.g = g1; |
| 539 |
entry.index = index1; |
| 540 |
Stack stack = new Stack();//it saves FMap geometries |
| 541 |
stack.push(entry); |
| 542 |
ArrayList geometries = new ArrayList(); |
| 543 |
|
| 544 |
Geometry jtsGeo = g1.toJTSGeometry(); |
| 545 |
geometries.add(jtsGeo);//it saves jts geometries
|
| 546 |
|
| 547 |
if(dissolveCriteria instanceof ISpatialDissolveCriteria){ |
| 548 |
((ISpatialDissolveCriteria)dissolveCriteria).setCoordTrans(ct); |
| 549 |
((ISpatialDissolveCriteria)dissolveCriteria).setFirstGeometry(g1); |
| 550 |
} |
| 551 |
FunctionSummarizer sumarizer = new FunctionSummarizer(
|
| 552 |
numericField_sumarizeFunction, recordset); |
| 553 |
SpatialDissolveVisitor visitor = new SpatialDissolveVisitor(dissolveCriteria,
|
| 554 |
jtsGeo, |
| 555 |
entry, |
| 556 |
stack, |
| 557 |
geometries, |
| 558 |
va, |
| 559 |
sumarizer, |
| 560 |
cancel); |
| 561 |
|
| 562 |
while (stack.size() != 0) { |
| 563 |
dumpStack(stack); |
| 564 |
StackEntry sEntry = (StackEntry) stack.pop(); |
| 565 |
dissolvedGeometries.set(sEntry.index); |
| 566 |
|
| 567 |
/*//TODO
|
| 568 |
* Revisar si no deberiamos hacer
|
| 569 |
* ct.getInverted().convert(rect);
|
| 570 |
*
|
| 571 |
* */
|
| 572 |
Rectangle2D rect = sEntry.g.getBounds2D();
|
| 573 |
if(ct != null) |
| 574 |
rect = ct.convert(rect); |
| 575 |
double xmin = rect.getMinX();
|
| 576 |
double ymin = rect.getMinY();
|
| 577 |
double xmax = rect.getMaxX();
|
| 578 |
double ymax = rect.getMaxY();
|
| 579 |
double magnify = 15d; |
| 580 |
Rectangle2D query = new Rectangle2D.Double(xmin - magnify, ymin |
| 581 |
- magnify, (xmax - xmin) + magnify, (ymax - ymin) + magnify); |
| 582 |
Geometry jts = sEntry.g.toJTSGeometry(); |
| 583 |
visitor.setSeed(sEntry, jts); |
| 584 |
strategy.process(visitor, query); |
| 585 |
}// while
|
| 586 |
|
| 587 |
|
| 588 |
IGeometry newGeometry = FConverter.jts_to_igeometry(union2(geometries)); |
| 589 |
List sumarizedValues = sumarizer.getValues();
|
| 590 |
IFeature dissolvedFeature = null;
|
| 591 |
if(sumarizedValues != null || sumarizedValues.size() != 0){ |
| 592 |
dissolvedFeature = dissolveCriteria. |
| 593 |
getFeatureBuilder(). |
| 594 |
createFeature(newGeometry, |
| 595 |
sumarizedValues, |
| 596 |
fid, |
| 597 |
index1); |
| 598 |
}else{
|
| 599 |
dissolvedFeature = dissolveCriteria. |
| 600 |
getFeatureBuilder(). |
| 601 |
createFeature(newGeometry, |
| 602 |
index1, |
| 603 |
fid); |
| 604 |
} |
| 605 |
fid++; |
| 606 |
featureProcessor.processFeature(dissolvedFeature); |
| 607 |
dissolveCriteria.clear(); |
| 608 |
} |
| 609 |
|
| 610 |
private void dumpStack(Stack stack) { |
| 611 |
Enumeration e = stack.elements();
|
| 612 |
System.out.println("#####Elementos por procesar"); |
| 613 |
while(e.hasMoreElements()){
|
| 614 |
System.out.println("#######- "+((StackEntry)e.nextElement()).index); |
| 615 |
} |
| 616 |
} |
| 617 |
|
| 618 |
/**
|
| 619 |
* Returns the union of all geometries of the list
|
| 620 |
*
|
| 621 |
* @param geometries
|
| 622 |
* @return
|
| 623 |
*/
|
| 624 |
protected Geometry union(List geometries) { |
| 625 |
Geometry union = null;
|
| 626 |
GeometryFactory fact = ((Geometry)geometries. |
| 627 |
get(0)).getFactory();
|
| 628 |
Iterator geomIt = geometries.iterator();
|
| 629 |
while(geomIt.hasNext()){
|
| 630 |
Geometry g = (Geometry) geomIt.next(); |
| 631 |
if(union == null) |
| 632 |
union = g; |
| 633 |
else{
|
| 634 |
Geometry[] geomArray = {union, g};
|
| 635 |
GeometryCollection gCol = |
| 636 |
fact. |
| 637 |
createGeometryCollection(geomArray); |
| 638 |
union = gCol.buffer(0d);
|
| 639 |
} |
| 640 |
} |
| 641 |
return union;
|
| 642 |
} |
| 643 |
|
| 644 |
protected Geometry union3(List geometries) { |
| 645 |
long t0 = System.currentTimeMillis(); |
| 646 |
Geometry union = null;
|
| 647 |
Iterator geomIt = geometries.iterator();
|
| 648 |
while(geomIt.hasNext()){
|
| 649 |
Geometry g = (Geometry) geomIt.next(); |
| 650 |
if(union == null) |
| 651 |
union = g; |
| 652 |
else{
|
| 653 |
union = union.union(g); |
| 654 |
} |
| 655 |
} |
| 656 |
long t1 = System.currentTimeMillis(); |
| 657 |
System.out.println((t1-t0)+ " en procesar union 3"); |
| 658 |
return union;
|
| 659 |
} |
| 660 |
|
| 661 |
protected Geometry union2(List geometries){ |
| 662 |
Geometry union = null;
|
| 663 |
Geometry[] geom = new Geometry[geometries.size()]; |
| 664 |
geometries.toArray(geom); |
| 665 |
GeometryFactory fact = geom[0].getFactory();
|
| 666 |
Geometry geomColl = fact.createGeometryCollection(geom); |
| 667 |
union = geomColl.buffer(0);
|
| 668 |
return union;
|
| 669 |
|
| 670 |
} |
| 671 |
} |