Application: gvSIG desktop

/* 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

 */

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

import java.awt.Image;

import com.hardcode.driverManager.DriverLoadException;

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

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

import com.iver.cit.gvsig.fmap.DriverException;

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

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

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

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

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

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

/**

 * Clase padre de los adaptadores de los drivers. De momento mantiene solo el

 * ?ndice creado sobre la capa

 */

public abstract class VectorialAdapter implements ReadableVectorial {

        protected VectorialDriver driver;

        /**

         * Establece el driver sobre el que act?a el adaptador

         *

         * @param driver

         */

        public void setDriver(VectorialDriver driver) {

                this.driver = driver;

        }

        /**

         * Obtiene una referencia al objeto que implementa la interfaz vectorial

         * con el fin de que las Strategy puedan optimizar en funci?n del driver.

         *

         * @return VectorialDriver

         */

        public VectorialDriver getDriver() {

                return driver;

        }

        /**

         * Devuelve el DataSource a pasrtir del nombre.

         *

         * @return DataSource.

         *

         * @throws DriverLoadException

         */

        public abstract DataSource getRecordset()

                throws DriverLoadException;

        /**

         * Por defecto devuelve null, y se le pone el icono por defecto.

         * Si el driver reescribe este m?todo, se usar? este icono en el TOC.

         * 

         * @return

         */

        public Image getImageIcon()

        {

            return null; 

        }

        public DriverAttributes getDriverAttributes()

        {

            if (driver != null)

                return driver.getDriverAttributes();

            return null;

        }

    /**

     * En la implementaci?n por defecto podemos hacer que cada

     * feature tenga ID = numero de registro.

     * En el DBAdapter podr?amos "overrride" este m?todo y poner

     * como ID de la Feature el campo ?nico escogido en

     * la base de datos.

     * @param numReg

     * @return

     * @throws DriverException

     */

    public IFeature getFeature(int numReg) throws DriverException

    {

        IGeometry geom;

        IFeature feat = null;

        try {

            geom = getShape(numReg);

            DataSource rs = getRecordset();

            Value[] regAtt = new Value[rs.getFieldCount()];

            for (int fieldId=0; fieldId < rs.getFieldCount(); fieldId++ )

            {       

                regAtt[fieldId] =  rs.getFieldValue(numReg, fieldId);

            }

            feat = new DefaultFeature(geom, regAtt, numReg + "");

        } catch (DriverIOException e) {

            throw new DriverException(e);

        } catch (DriverLoadException e) {

            throw new DriverException(e);

        } catch (com.hardcode.gdbms.engine.data.driver.DriverException e) {

            throw new DriverException(e);

        }

        return feat;

    }

}