| gvSIG desktop 1

/*

 * Created on 02-mar-2006

 *

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: MergeGeoprocess.java 4447 2006-03-15 18:35:56Z azabala $

* $Log$

* Revision 1.3  2006-03-15 18:34:16  azabala

* *** empty log message ***

*

* Revision 1.2  2006/03/14 18:32:46  fjp

* Cambio con LayerDefinition para que sea compatible con la definici?n de tablas tambi?n.

*

* Revision 1.1  2006/03/05 19:59:16  azabala

* *** empty log message ***

*

*

*/

package com.iver.gvsig.geoprocessing.impl.merge;

import java.io.File;

import java.util.Map;

import org.cresques.cts.IProjection;

import com.hardcode.gdbms.engine.data.driver.DriverException;

import com.iver.cit.gvsig.fmap.drivers.ILayerDefinition;

import com.iver.cit.gvsig.fmap.drivers.shp.IndexedShpDriver;

import com.iver.cit.gvsig.fmap.edition.ISchemaManager;

import com.iver.cit.gvsig.fmap.edition.IWriter;

import com.iver.cit.gvsig.fmap.edition.writers.shp.ShpWriter;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

import com.iver.cit.gvsig.fmap.layers.LayerFactory;

import com.iver.cit.gvsig.fmap.operations.strategies.Strategy;

import com.iver.cit.gvsig.fmap.operations.strategies.StrategyManager;

import com.iver.cit.gvsig.fmap.operations.strategies.VisitException;

import com.iver.gvsig.geoprocessing.impl.jtsprocessors.FeaturePersisterProcessor2;

import com.iver.gvsig.geoprocessing.model.GeoprocessException;

import com.iver.gvsig.geoprocessing.model.IGeoprocess;

import com.iver.gvsig.geoprocessing.schemabuilder.DefinitionUtils;

import com.iver.utiles.swing.threads.IMonitorableTask;

/**

 * This geoprocess is "equivalent" to UNION relational operator.

 * Output layer will have a geometry for each geometry of input layer.

 * Alse, output layer will preserve a schema of one of input layers.

 * @author azabala

 *

 */

public class MergeGeoprocess implements IGeoprocess {

        private FLyrVect[] inputLayers;

        private FLyrVect outputSchemaLayer;

        private IWriter writer;

        private ISchemaManager schemaManager;

        public MergeGeoprocess(){

        }

        public void setParameters(Map params) throws GeoprocessException {

        }

        public void checkPreconditions() throws GeoprocessException {

                if(inputLayers == null)

                        throw new GeoprocessException("No se han especificado las capas a juntar en un merge");

                if(outputSchemaLayer == null)

                        throw new GeoprocessException("Merge: no se ha especificado que capa determinara los atributos");

                for(int i = 0; i < inputLayers.length; i++){

                        if(inputLayers[i] == null)

                                throw new GeoprocessException("Merge: la capa "+i+" no est? definida -null");

                }

        }

        public void process() throws GeoprocessException {

                FeaturePersisterProcessor2 processor =

                        new FeaturePersisterProcessor2(writer);

                MergeVisitor merge = new MergeVisitor(

                                                        createLayerDefinition(), 

                                                        processor);

                for(int i = 0; i < inputLayers.length; i++){

                        Strategy strategy = StrategyManager.

                                        getStrategy(inputLayers[i]);

                        try {

                                strategy.process(merge);

                        } catch (com.iver.cit.gvsig.fmap.DriverException e) {

                                throw new GeoprocessException("Merge: error al leer la capa "+inputLayers[i].getName());

                        } catch (VisitException e) {

                                throw new GeoprocessException("Merge: error al procesar la capa "+inputLayers[i].getName());

                        }

                }

        }

        public void cancel() {

                // TODO Auto-generated method stub

        }

        public FLyrVect getResult() throws GeoprocessException {

                FLyrVect solution = null;

                String fileName = ((ShpWriter)writer).getShpPath();

                File file = new File(fileName);

                IProjection proj = this.outputSchemaLayer.getProjection();

                try {

                        IndexedShpDriver driver = new IndexedShpDriver();

                        driver.open(file);

                        driver.initialize();

                        solution = (FLyrVect) LayerFactory.createLayer(fileName,

                                                                        driver,

                                                                        file,

                                                                        proj);

                        return solution; 

                } catch (Exception e) {

                        throw new GeoprocessException("Problemas al cargar la capa resultado");

                }         

        }

        public void setResultLayerProperties(IWriter writer,

                        ISchemaManager schemaManager) {

                this.writer = writer;

                this.schemaManager = schemaManager;

        }

        public ILayerDefinition createLayerDefinition() {

                try {

                        return DefinitionUtils.createLayerDefinition(this.outputSchemaLayer);

                } catch (Exception e) {

                        return null;

                }

        }

        public void setInputLayers(FLyrVect[] inputLayers) {

                this.inputLayers = inputLayers;

        }

        public void setOutputSchemaLayer(FLyrVect outputSchemaLayer) {

                this.outputSchemaLayer = outputSchemaLayer;

        }

        public IMonitorableTask createTask() {

                // TODO Auto-generated method stub

                return null;

        }

}