Application: gvSIG desktop

/*

 * Created on 18-sep-2007

 *

 * 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: FeatureCollectionMemoryDriver.java 14143 2007-09-27 16:58:37Z azabala $

* $Log: FeatureCollectionMemoryDriver.java,v $

* Revision 1.1  2007/09/19 15:27:41  azabala

* first version in cvs

*

*

*/

package com.iver.cit.gvsig.fmap.drivers;

import java.awt.geom.Rectangle2D;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.hardcode.gdbms.driver.exceptions.ReloadDriverException;

import com.hardcode.gdbms.driver.exceptions.WriteDriverException;

import com.hardcode.gdbms.engine.data.DataSourceFactory;

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

import com.hardcode.gdbms.engine.data.edition.DataWare;

import com.hardcode.gdbms.engine.values.Value;

import com.iver.cit.gvsig.exceptions.expansionfile.ExpansionFileReadException;

import com.iver.cit.gvsig.fmap.core.IFeature;

import com.iver.cit.gvsig.fmap.core.IGeometry;

/**

 * Driver to work with a collection of IFeature.

 * 

 * If offers a layer to work with a collection of a features as a vectorial driver.

 * It doesnt allow to write or edit existing features.

 * 

 * @author azabala

 *

 */

public class FeatureCollectionMemoryDriver implements VectorialDriver, 

                                                                                                                ObjectDriver,

                                                                                                                BoundedShapes {

        public static final Rectangle2D EMPTY_FULL_EXTENT = new Rectangle2D.Double();

        /**

     * Name of the data source of this driver

     */

        String name;

        /**

         * contains all features this driver allows to access. 

         */

        List features;

        /**

         * Definition of the features.

         */

        LayerDefinition layerDefinition;

        /**

         * Full extent of all features

         */

        Rectangle2D fullExtent;

        //TODO Remove this class

        DriverAttributes attributes = null;

        /**

         * Constructor 

         * @param name descriptive name of the data source

         * @param features collection of features in memory

         * @param definition definition of the layer of these features

         */

        public FeatureCollectionMemoryDriver(String name,

                                                                                List features, 

                                                                        LayerDefinition definition){

                this.name = name;

                this.features = features;

                this.layerDefinition = definition;

                this.attributes = new DriverAttributes();

                attributes.setLoadedInMemory(true);

                computeFullExtent();

        }

        public int getShapeType() {

                return layerDefinition.getShapeType();

        }

        public String getName() {

                return name;

        }

        public int getShapeCount() throws ReadDriverException {

                return features.size();

        }

        public DriverAttributes getDriverAttributes() {

                return attributes;

        }

        public Rectangle2D getFullExtent() throws ReadDriverException, ExpansionFileReadException {

                if(fullExtent == null){

                        //collection is empty

                        return EMPTY_FULL_EXTENT;

                }

                return fullExtent;

        }

        public IGeometry getShape(int index) throws ReadDriverException {

                if(index <  features.size())

                        return ((IFeature) features.get(index)).getGeometry();

                else

                        return null;

        }

        public void reload() throws ReloadDriverException {

                this.name = "";

                this.features = new ArrayList();

                this.fullExtent = null;

                this.layerDefinition = null;

        }

        public boolean isWritable() {

                return false;

        }

        public int[] getPrimaryKeys() throws ReadDriverException {

                return null;

        }

        public void write(DataWare dataWare) throws WriteDriverException, ReadDriverException {

        }

        public void setDataSourceFactory(DataSourceFactory dsf) {

        }

        public Value getFieldValue(long rowIndex, int fieldId) throws ReadDriverException {

                IFeature feature = (IFeature) features.get((int) rowIndex);

                return feature.getAttributes()[fieldId];

        }

        public int getFieldCount() throws ReadDriverException {

                return layerDefinition.getFieldsDesc().length;

        }

        public String getFieldName(int fieldId) throws ReadDriverException {

                FieldDescription[] fields = layerDefinition.getFieldsDesc();

                return fields[fieldId].getFieldName();

        }

        public long getRowCount() throws ReadDriverException {

                return features.size();

        }

        public int getFieldType(int i) throws ReadDriverException {

                FieldDescription[] fields = layerDefinition.getFieldsDesc();

                return fields[i].getFieldType();

        }

        public int getFieldWidth(int i) throws ReadDriverException {

                FieldDescription[] fields = layerDefinition.getFieldsDesc();

                return fields[i].getFieldLength();

        }

        public Rectangle2D getShapeBounds(int index) throws ReadDriverException, ExpansionFileReadException {

                IGeometry geometry = getShape(index);

                return geometry.getBounds2D();

        }

        public int getShapeType(int index) throws ReadDriverException {

                IGeometry geometry = getShape(index);

                return geometry.getGeometryType();

        }

        private void computeFullExtent() {

                Iterator featuresIt = features.iterator();

                while(featuresIt.hasNext()){

                        IFeature feature = (IFeature) featuresIt.next();

                        Rectangle2D rAux = feature.getGeometry().getBounds2D();

                        if(fullExtent == null)

                                fullExtent = rAux;

                        else

                                fullExtent.add(rAux);

                }

        }

}