root / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / postgis / PostGisDriver.java @ 1691
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/*
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* Created on 04-mar-2005
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*
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* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2004 IVER T.I. and Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.gvsig.fmap.drivers.postgis; |
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import java.awt.geom.Rectangle2D; |
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import java.sql.Connection; |
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import java.sql.ResultSet; |
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import java.sql.SQLException; |
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import java.sql.Statement; |
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import org.postgis.PGbox3d; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.drivers.DefaultDBDriver; |
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import com.iver.cit.gvsig.fmap.drivers.DriverAttributes; |
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import com.vividsolutions.jts.io.ParseException; |
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/**
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* @author FJP
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*
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* TODO To change the template for this generated type comment go to
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* Window - Preferences - Java - Code Generation - Code and Comments
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*/
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public class PostGisDriver extends DefaultDBDriver { |
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private WKTParser parser = new WKTParser(); |
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private int fetch_min=-1; |
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private int fetch_max=-1; |
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private Statement st; |
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private Rectangle2D fullExtent = null; |
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private String strAux; |
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/**
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*
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*/
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public PostGisDriver() {
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} |
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/* (non-Javadoc)
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* @see com.iver.cit.gvsig.fmap.drivers.VectorialDriver#getDriverAttributes()
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*/
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public DriverAttributes getDriverAttributes() {
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return null; |
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} |
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/* (non-Javadoc)
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* @see com.hardcode.driverManager.Driver#getName()
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*/
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public String getName() { |
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return "PostGIS JDBC Driver"; |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getShape(int)
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*/
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public IGeometry getShape(int index) { |
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IGeometry geom = null;
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boolean resul;
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try {
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// EL ABSOLUTE NO HACE QUE SE VUELVAN A LEER LAS
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// FILAS, ASI QUE MONTAMOS ESTA HISTORIA PARA QUE
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// LO HAGA
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// System.out.println("getShape " + index);
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if (index < fetch_min)
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{ |
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rs.close(); |
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rs = st.executeQuery(sqlOrig); |
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fetch_min = 0;
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fetch_max = rs.getFetchSize(); |
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} |
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while (index >= fetch_max)
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{ |
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rs.last(); |
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// forzamos una carga
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rs.next(); |
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fetch_min = fetch_max; |
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fetch_max = fetch_max + rs.getFetchSize(); |
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// System.out.println("fetchSize = " + rs.getFetchSize() + " " + fetch_min + "-" + fetch_max);
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} |
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rs.absolute(index+1 - fetch_min);
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strAux = rs.getString(1);
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geom = parser.read(strAux); |
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} catch (SQLException e) { |
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e.printStackTrace(); |
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} catch (ParseException e) { |
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e.printStackTrace(); |
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} |
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return geom;
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} |
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/**
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* @param conn
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* @param tableName
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* @param fields OJO: EL PRIMER CAMPO HA DE SER EL DE GEOMETRIA
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* @param whereClause
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*/
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public void setData(Connection conn, String tableName, String fields, String whereClause) |
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{ |
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this.conn = conn;
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this.tableName = tableName;
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this.whereClause = whereClause;
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this.sqlOrig = "SELECT " + fields + " FROM " + tableName + " " + whereClause; |
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try {
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st = conn.createStatement(ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY); |
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st.setFetchSize(5000);
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rs = st.executeQuery(sqlOrig); |
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fetch_min = 0;
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fetch_max = rs.getFetchSize(); |
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metaData = rs.getMetaData(); |
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} catch (SQLException e) { |
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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} |
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/**
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* @see com.iver.cit.gvsig.fmap.layers.ReadableVectorial#getFullExtent()
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*/
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public Rectangle2D getFullExtent(){ |
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if (fullExtent == null) |
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{ |
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try
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{ |
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Statement s = conn.createStatement();
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ResultSet r = s.executeQuery("SELECT extent(the_geom) AS FullExtent FROM " + tableName); |
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r.next(); |
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String strAux = r.getString(1); |
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System.out.println("fullExtent = " + strAux); |
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PGbox3d regeom = new PGbox3d(strAux.toString());
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double x = regeom.getLLB().x;
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double y = regeom.getLLB().y;
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double w = regeom.getURT().x -x;
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double h = regeom.getURT().y - y;
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fullExtent = new Rectangle2D.Double(x, y, w, h); |
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} |
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catch (SQLException e) |
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{ |
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System.err.println(e.getMessage());
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} |
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} |
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return fullExtent;
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} |
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} |