Application: gvSIG desktop

/*

 * Created on 04-mar-2005

 *

 * 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.drivers.jdbc.mysql;

import java.awt.geom.Rectangle2D;

import java.sql.Connection;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import org.apache.log4j.Logger;

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

import com.iver.andami.messages.NotificationManager;

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

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

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

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

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

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

import com.iver.cit.gvsig.fmap.drivers.jdbc.WKBParser2;

/**

 * @author FJP

 * 

 * TODO To change the template for this generated type comment go to Window -

 * Preferences - Java - Code Generation - Code and Comments

 */

public class MySQLDriver extends DefaultDBDriver {

        private static Logger logger = Logger

                        .getLogger(MySQLDriver.class.getName());

        private WKBParser2 parser = new WKBParser2();

        // private WKTParser wktParser = new WKTParser();

        /*

         * private int fetch_min=-1; private int fetch_max=-1;

         */

        private Statement st;

        private String strAux;

        private String strEPSG = "-1";

        private String originalEPSG;

        private String completeWhere;

        /**

         * Don't have information about working area

         */

        private String sqlOrig;

        /**

         * Does have information about working area and order

         */

        private String sqlTotal;

        /**

         * 

         */

        public MySQLDriver() {

        }

        /*

         * (non-Javadoc)

         * 

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialDriver#getDriverAttributes()

         */

        public DriverAttributes getDriverAttributes() {

                return null;

        }

        /*

         * (non-Javadoc)

         * 

         * @see com.hardcode.driverManager.Driver#getName()

         */

        public String getName() {

                return "mySQL JDBC Driver";

        }

        /**

         * @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShape(int)

         */

        public IGeometry getShape(int index) {

                IGeometry geom = null;

                boolean resul;

                try {

                        if (rs != null) {

                                rs.absolute(index + 1);

                                byte[] data = rs.getBytes(1);

                                geom = parser.parse(data);

                        }

                } catch (SQLException e) {

                        e.printStackTrace();

                }

                return geom;

        }

        /**

         * @param conn

         */

        /*

         * (non-Javadoc)

         * 

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialJDBCDriver#setData(java.sql.Connection,

         *      java.lang.String, java.lang.String, java.lang.String, int)

         */

        public void setData(Connection conn, DBLayerDefinition lyrDef) {

                this.conn = conn;

                setLyrDef(lyrDef);

                try {

                        // NO ESTA LISTO ESTO AUN EN mySQL, o no s? usuarlo getTableEPSG();

                        sqlOrig = "SELECT " + getTotalFields() + " FROM "

                                        + getLyrDef().getTableName() + " "

                                        + getLyrDef().getWhereClause();

                        completeWhere = getCompoundWhere(workingArea, strEPSG);

                        completeWhere = completeWhere;

                        String sqlAux = sqlOrig + completeWhere + " ORDER BY "

                                        + getLyrDef().getFieldID();

                        completeWhere = getLyrDef().getWhereClause() + completeWhere;

                        logger.info("Cadena SQL:" + sqlAux);

                        sqlTotal = sqlAux;

                        st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY,

                                        ResultSet.CONCUR_READ_ONLY);

                        rs = st.executeQuery(sqlTotal);

                        metaData = rs.getMetaData();

                        // Le pegamos un primera pasada para poder relacionar

                        // un campo de identificador ?nico (parecido al OID en

                        // postgresql) con el ?ndice dentro del recordset.

                        // Esto cuando haya ediciones, no es v?lido, y hay

                        // que refrescarlo.

                        doRelateID_FID();

                } catch (SQLException e) {

                        NotificationManager.addError(

                                        "Error al conectar a la base de datos.", e);

                        e.printStackTrace();

                }

        }

        /*

         * (non-Javadoc)

         * 

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialDatabaseDriver#getGeometryIterator(java.lang.String)

         */

        public IFeatureIterator getFeatureIterator(String sql)

                        throws com.iver.cit.gvsig.fmap.DriverException {

                Statement st;

                MySqlFeatureIterator geomIterator = null;

                try {

                        logger.debug(sql);

                        st = conn.createStatement();

                        // st.setFetchSize(2000);

                        ResultSet rs = st.executeQuery(sql);

                        geomIterator = new MySqlFeatureIterator(rs);

                        geomIterator.setLyrDef(getLyrDef());

                } catch (SQLException e) {

                        e.printStackTrace();

                        throw new com.iver.cit.gvsig.fmap.DriverException(e);

                }

                return geomIterator;

        }

        /*

         * (non-Javadoc)

         * 

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialDatabaseDriver#getGeometryIterator(java.awt.geom.Rectangle2D)

         */

        public IFeatureIterator getFeatureIterator(Rectangle2D r, String strEPSG)

                        throws DriverException {

                if (workingArea != null)

                        r = r.createIntersection(workingArea);

                String sqlAux = sqlOrig + getCompoundWhere(r, strEPSG);

                return getFeatureIterator(sqlAux);

        }

        /**

         * Le pasas el rect?ngulo que quieres pedir. La primera vez es el

         * workingArea, y las siguientes una interseccion de este rectangulo con el

         * workingArea

         * 

         * @param r

         * @param strEPSG

         * @return

         */

        private String getCompoundWhere(Rectangle2D r, String strEPSG) {

                if (r == null)

                        return "";

                double xMin = r.getMinX();

                double yMin = r.getMinY();

                double xMax = r.getMaxX();

                double yMax = r.getMaxY();

                String wktBox = "GeomFromText('LINESTRING(" + xMin + " " + yMin + ", "

                                + xMax + " " + yMin + ", " + xMax + " " + yMax + ", " + xMin

                                + " " + yMax + ")', " + strEPSG + ")";

                String sqlAux;

                if (getWhereClause().startsWith("WHERE"))

                        sqlAux = " MBRIntersects(" + wktBox + ",ogc_geom)";

                else

                        sqlAux = "WHERE MBRIntersects(" + wktBox + ",ogc_geom)";

                return sqlAux;

        }

        public void open() {

                // TODO Auto-generated method stub

        }

        /**

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialDatabaseDriver#getConnectionStringBeginning()

         */

        public String getConnectionStringBeginning() {

                return "jdbc:mysql:";

        }

        static {

                try {

                        Class.forName("com.mysql.jdbc.Driver");

                } catch (ClassNotFoundException e) {

                        throw new RuntimeException(e);

                }

        }

        /**

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialDatabaseDriver#getGeometryField(java.lang.String)

         */

        public String getGeometryField(String fieldName) {

                return "ASBINARY(" + fieldName + ")";

        }

        /**

         * @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#getPrimaryKeys()

         */

        public int[] getPrimaryKeys()

                        throws com.hardcode.gdbms.engine.data.driver.DriverException {

                return new int[] { getLyrDef().getIdFieldID() - 2 };

        }

        /**

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialJDBCDriver#getDefaultPort()

         */

        public int getDefaultPort() {

                return 3306;

        }

        /**

         * @see com.hardcode.gdbms.engine.data.driver.ObjectDriver#write(com.hardcode.gdbms.engine.data.edition.DataWare)

         */

        public void write(DataWare arg0)

                        throws com.hardcode.gdbms.engine.data.driver.DriverException {

                // TODO Auto-generated method stub

        }

        private void getTableEPSG() {

                try {

                        Statement stAux = conn.createStatement();

                        String sql = "SELECT SRID(ogc_geom) FROM " + getTableName()

                                        + " LIMIT 1;";

                        ResultSet rs = stAux.executeQuery(sql);

                        rs.next();

                        originalEPSG = "" + rs.getInt(1);

                        rs.close();

                } catch (SQLException e) {

                        // TODO Auto-generated catch block

                        e.printStackTrace();

                }

        }

        public String getSqlTotal() {

                return sqlTotal;

        }

        /**

         * @return Returns the completeWhere.

         */

        public String getCompleteWhere() {

                return completeWhere;

        }

        /*

         * (non-Javadoc)

         * 

         * @see com.iver.cit.gvsig.fmap.drivers.VectorialDatabaseDriver#getFeatureIterator(java.awt.geom.Rectangle2D,

         *      java.lang.String, java.lang.String[])

         */

        public IFeatureIterator getFeatureIterator(Rectangle2D r, String strEPSG,

                        String[] alphaNumericFieldsNeeded) throws DriverException {

                if (workingArea != null)

                        r = r.createIntersection(workingArea);

                String strAux = getGeometryField(getLyrDef().getFieldGeometry());

                boolean found = false;

                if (alphaNumericFieldsNeeded != null) {

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

                                strAux = strAux + ", " + alphaNumericFieldsNeeded[i];

                                if (alphaNumericFieldsNeeded[i]

                                                .equals(getLyrDef().getFieldID()))

                                        found = true;

                        }

                }

                // Nos aseguramos de pedir siempre el campo ID

                if (found == false)

                        strAux = strAux + ", " + getLyrDef().getFieldID();

                String sqlProv = "SELECT " + strAux + " FROM "

                                + getLyrDef().getTableName() + " "

                                + getLyrDef().getWhereClause();

                String sqlAux;

                sqlAux = sqlProv + getCompoundWhere(r, strEPSG);

                System.out.println("SqlAux getFeatureIterator = " + sqlAux);

                return getFeatureIterator(sqlAux);

        }

}