Application: gvSIG desktop

/*

 * Created on 16-feb-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: AbstractGeoprocess.java 4419 2006-03-14 19:35:13Z azabala $

* $Log$

* Revision 1.5  2006-03-14 19:34:18  azabala

* *** empty log message ***

*

* Revision 1.4  2006/03/14 18:32:46  fjp

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

*

* Revision 1.3  2006/03/07 21:01:33  azabala

* *** empty log message ***

*

* Revision 1.2  2006/03/06 19:48:39  azabala

* *** empty log message ***

*

* Revision 1.1  2006/02/17 16:04:28  azabala

* *** empty log message ***

*

*

*/

package com.iver.gvsig.geoprocessing.impl;

import java.io.File;

import java.util.Map;

import org.cresques.cts.IProjection;

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.CancellableMonitorable;

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

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

/**

 * Base class with all commong logic to geoprocesses

 * @author azabala

 *

 */

public abstract class AbstractGeoprocess implements IGeoprocess {

        /**

         * Writes result features in a persistent

         * data format.

         */

        protected IWriter writer;

        /**

         * Creates schema of result data format.

         */

        protected ISchemaManager schemaManager;

        /**

         * All geoprocesses at least work with one

         * vectorial layer

         */

        protected FLyrVect firstLayer;

        public abstract void setParameters(Map params) throws GeoprocessException;

        public abstract void checkPreconditions() throws GeoprocessException;

        public abstract void process() throws GeoprocessException;

        public abstract void cancel();

        /**

         * Creates a new Layer with:

         * a) the same projection than input layer.

         * b) an adapter created to work with writer's persistent store

         * 

         * @return FLyrVect with geoprocess result

         */

        public FLyrVect getResult() throws GeoprocessException {

                FLyrVect solution = null;

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

                File file = new File(fileName);

                IProjection proj = firstLayer.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 abstract ILayerDefinition createLayerDefinition();

}