root / trunk / extensions / extGeoProcessing / src / com / iver / gvsig / geoprocessing / impl / dissolve / DissolveGeoprocess.java @ 4447
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/*
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* Created on 23-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: DissolveGeoprocess.java 4447 2006-03-15 18:35:56Z azabala $
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* $Log$
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* Revision 1.6 2006-03-15 18:33:24 azabala
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* *** empty log message ***
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*
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* Revision 1.5 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 1.4 2006/03/07 21:01:33 azabala
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* *** empty log message ***
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*
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* Revision 1.3 2006/03/06 19:48:39 azabala
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* *** empty log message ***
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*
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* Revision 1.2 2006/03/05 19:58:20 azabala
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* *** empty log message ***
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*
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* Revision 1.1 2006/02/26 20:53:44 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.dissolve; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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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.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.EditionException; |
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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.jtsprocessors.FeaturePersisterProcessor2; |
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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.model.SummarizationFunction; |
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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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* Processes each geometry of a polygonal vectorial layer, looking for
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* its adjacent polygons. If this adjacent polygons has the same specified
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* field value as processed geometry, this polygons will be dissolved.
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*
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*
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* @author azabala
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*
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*/
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public class DissolveGeoprocess extends AbstractGeoprocess |
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implements IOneLayerGeoprocess {
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private String dissolveField; |
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private boolean dissolveOnlySelection; |
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private LayerDefinition resultLayerDefinition;
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private Map fields_functions; |
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private DissolveVisitor visitor;
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/**
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* Constructor.
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*
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* @param inputLayer Layer whose geometries we are
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* going to dissolve
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*/
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public DissolveGeoprocess(FLyrVect inputLayer, String dissolveField) { |
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setFirstOperand(inputLayer); |
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this.dissolveField = dissolveField;
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} |
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public void setFieldsFunctions(Map fieldsFunctions){ |
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this.fields_functions = fieldsFunctions;
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} |
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public void setFirstOperand(FLyrVect inputLayer) { |
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this.firstLayer = inputLayer;
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} |
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public void setParameters(Map params) throws GeoprocessException { |
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Boolean onlySelection =
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(Boolean) params.get("layer_selection"); |
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if(onlySelection != null) |
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dissolveOnlySelection = 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("Buffer con capa de entrada a null"); |
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if(this.writer == null || |
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this.schemaManager == null){ |
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throw new GeoprocessException("Operacion de dissolve sin especificar capa de resultados"); |
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} |
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if(this.dissolveField == null) |
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throw new GeoprocessException("No se ha proporcionado el campo para dissolver"); |
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} |
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public void process() throws GeoprocessException { |
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try {
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FeaturePersisterProcessor2 processor = |
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new FeaturePersisterProcessor2(writer);
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visitor = new DissolveVisitor(this.dissolveField, processor); |
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visitor.setDissolvedAttributesInfo(fields_functions); |
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Strategy strategy = |
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StrategyManager.getStrategy(firstLayer); |
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visitor.setStrategy(strategy); |
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if(this.dissolveOnlySelection){ |
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strategy.process(visitor, firstLayer. |
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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 (DriverException e) {
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throw new GeoprocessException("Error accediendo a los datos durante un dissolve"); |
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} catch (VisitException e) {
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throw new GeoprocessException("Error al procesar los elementos de la capa de entrada durante un dissolve"); |
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} |
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} |
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public void cancel() { |
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try {
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schemaManager.drop(); |
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} catch (EditionException 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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public ILayerDefinition createLayerDefinition() {
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if(resultLayerDefinition == null){ |
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ArrayList fields = new ArrayList(); |
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resultLayerDefinition = new SHPLayerDefinition();
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resultLayerDefinition.setShapeType(XTypes.POLYGON); |
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Iterator fieldsIt = fields_functions.keySet().iterator();
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while(fieldsIt.hasNext()){
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String field = (String) fieldsIt.next(); |
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SummarizationFunction[] functions =
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(SummarizationFunction[]) fields_functions.get(field);
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for(int i = 0; i < functions.length; i++){ |
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FieldDescription description = |
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new FieldDescription();
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description.setFieldLength(10);
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description.setFieldDecimalCount(4);
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//to avoid truncation of field names (f.example shp)
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//we only catch three first letters
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String shortName = null; |
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if(field.length() > 3) |
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shortName = field.substring(0,3); |
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else
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shortName = field; |
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description.setFieldName( |
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shortName + "_" + functions[i].toString());
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description.setFieldType(XTypes.DOUBLE); |
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fields.add(description); |
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}//for
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}//while
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FieldDescription[] fieldsDesc = null; |
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if(fields.size() == 0){ |
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fieldsDesc = new FieldDescription[0]; |
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}else{
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fieldsDesc = new FieldDescription[fields.size()];
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fields.toArray(fieldsDesc); |
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} |
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resultLayerDefinition.setFieldsDesc(fieldsDesc); |
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} |
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return resultLayerDefinition;
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} |
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public IMonitorableTask createTask() {
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try {
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return new DissolveMonitorableTask(); |
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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 diff 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 DissolveMonitorableTask implements IMonitorableTask { |
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private CancellableMonitorable cancelMonitor = null; |
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// FIXME INTERNACIONALIZAR ESTO
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String DISSOLVE_MESSAGE = "Computing dissolve: "; |
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private boolean finished = false; |
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DissolveMonitorableTask() 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() throws DriverIOException{ |
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DefaultCancellableMonitorable monitor = new
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DefaultCancellableMonitorable(); |
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monitor.setInitialStep(0);
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//monitor.setDeterminatedProcess(false);
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monitor.setFinalStep(firstLayer.getSource().getShapeCount()); |
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monitor.setDeterminatedProcess(true);
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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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if(visitor == null) |
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return getInitialStep();
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else
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return visitor.getNumProcessedGeometries();
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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 "Dissolve 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 DISSOLVE_MESSAGE + getCurrentStep() + " of " + |
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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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try {
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FeaturePersisterProcessor2 processor = |
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new FeaturePersisterProcessor2(writer);
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visitor = new DissolveVisitor(dissolveField, processor);
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visitor.setDissolvedAttributesInfo(fields_functions); |
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Strategy strategy = |
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StrategyManager.getStrategy(firstLayer); |
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visitor.setStrategy(strategy); |
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if(dissolveOnlySelection){
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strategy.process(visitor, firstLayer. |
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getRecordset(). |
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getSelection(), |
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cancelMonitor); |
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}else{
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strategy.process(visitor, cancelMonitor); |
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} |
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} catch (DriverException e) {
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throw new GeoprocessException("Error accediendo a los datos durante un dissolve"); |
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} catch (VisitException e) {
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throw new GeoprocessException("Error al procesar los elementos de la capa de entrada durante un dissolve"); |
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} finally{
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finished = true;
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} |
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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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