/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2009, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*/
package org.geotools.gce.imagemosaic.jdbc.custom;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.concurrent.LinkedBlockingQueue;
import javax.imageio.ImageIO;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.geotools.gce.imagemosaic.jdbc.Config;
import org.geotools.gce.imagemosaic.jdbc.ImageLevelInfo;
import org.geotools.gce.imagemosaic.jdbc.TileQueueElement;
import org.geotools.geometry.GeneralEnvelope;
import org.geotools.referencing.CRS;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import com.vividsolutions.jts.geom.Envelope;
/**
* @author mcr
*
*
*
* @source $URL$
*/
public class JDBCAccessH2Custom extends JDBCAccessCustom {
public JDBCAccessH2Custom(Config config) throws IOException {
super(config);
}
/* (non-Javadoc)
* @see org.geotools.gce.imagemosaic.jdbc.custom.JDBCAccessCustom#initialize()
*/
@Override
public void initialize() throws SQLException, IOException {
Connection con = getConnection();
Envelope extent = getExtent(con);
CoordinateReferenceSystem crs = getCRS();
String stmt = "select RESX,RESY from oek order by level";
PreparedStatement ps = con.prepareStatement(stmt);
ResultSet rs = ps.executeQuery();
while (rs.next()) {
ImageLevelInfo li = new ImageLevelInfo();
getLevelInfos().add(li);
li.setResX(rs.getDouble(1));
li.setResY(rs.getDouble(2)*-1);
li.setExtentMinX(extent.getMinX());
li.setExtentMaxX(extent.getMaxX());
li.setExtentMinY(extent.getMinY());
li.setExtentMaxY(extent.getMaxY());
li.setCrs(crs);
}
rs.close();
ps.close();
}
Envelope getExtent(Connection con) throws SQLException, IOException{
String stmt = "select RESX,RESY,ULX,ULY,DATA from OEK where level = 0";
PreparedStatement ps = con.prepareStatement(stmt);
ResultSet rs = ps.executeQuery();
rs.next();
double resX = rs.getDouble(1);
double resY = rs.getDouble(2);
double ulx = rs.getDouble(3);
double uly = rs.getDouble(4);
byte[] bytes = rs.getBytes(5);
BufferedImage img = ImageIO.read(new ByteArrayInputStream(bytes));
double minx = ulx;
double maxx = ulx + img.getWidth()*resX;
double miny = uly + img.getHeight() * resY;
double maxy = uly;
Envelope result = new Envelope(minx,maxx,miny,maxy);
rs.close();
ps.close();
return result;
}
/* (non-Javadoc)
* @see org.geotools.gce.imagemosaic.jdbc.custom.JDBCAccessCustom#startTileDecoders(java.awt.Rectangle, org.geotools.geometry.GeneralEnvelope, org.geotools.gce.imagemosaic.jdbc.ImageLevelInfo, java.util.concurrent.LinkedBlockingQueue, org.geotools.coverage.grid.GridCoverageFactory)
*/
@Override
public void startTileDecoders(Rectangle pixelDimension, GeneralEnvelope requestEnvelope,
ImageLevelInfo info, LinkedBlockingQueue<TileQueueElement> tileQueue,
GridCoverageFactory coverageFactory) throws IOException {
try {
Connection con = getConnection();
int level = getLevelInfos().indexOf(info);
BufferedImage img = getBufferedImage(level, con);
GeneralEnvelope genv = new GeneralEnvelope(info.getCrs());
genv.setRange(0, info.getExtentMinX(), info.getExtentMaxX());
genv.setRange(1, info.getExtentMinY(), info.getExtentMaxY());
TileQueueElement tqElem = new TileQueueElement("oek",img,genv);;
tileQueue.add(tqElem);
con.close();
} catch (SQLException ex) {
throw new RuntimeException(ex);
}
tileQueue.add(TileQueueElement.ENDELEMENT);
}
BufferedImage getBufferedImage(int level,Connection con) throws SQLException, IOException{
String stmt = "select DATA from OEK where level = "+level;
PreparedStatement ps = con.prepareStatement(stmt);
ResultSet rs = ps.executeQuery();
rs.next();
byte[] bytes = rs.getBytes(1);
BufferedImage img = ImageIO.read(new ByteArrayInputStream(bytes));
rs.close();
ps.close();
return img;
}
}