/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2008, 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;
import java.awt.Rectangle;
import java.io.IOException;
import java.sql.SQLException;
import java.util.concurrent.LinkedBlockingQueue;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.geotools.geometry.GeneralEnvelope;
/**
* This interface lists the methods wich are used by the ImageMosaicJDBCReader
* class to interact with the database system.
*
* @author mcr
*
*/
public interface JDBCAccess {
/**
* Method for starting the main action, getting the neccessairy tiles and
* decoding them in a multithreaded manner
*
* @param pixelDimension
* the needed pixel dimension
* @param requestEnvelope
* the needed envelope in world coordinates
* @param info
* the corresponding ImageLevelInfo object
* @param tileQueue
* a queue where to put the thread results
* @param coverageFactory
* GridCoverageFactory
* @throws IOException
*/
public abstract void startTileDecoders(Rectangle pixelDimension,
GeneralEnvelope requestEnvelope, ImageLevelInfo info,
LinkedBlockingQueue<TileQueueElement> tileQueue,
GridCoverageFactory coverageFactory) throws IOException;
/**
* @param level
* the level (0 is original, 1 is first pyramid,...)
* @return the corresponding ImageLevelInfo object
*/
public ImageLevelInfo getLevelInfo(int level);
/**
* @return the number of existing pyramids
*/
public int getNumOverviews();
/**
* initialze the the JDBCAccess object, has to be called exactly once
*
* @throws SQLException
* @throws IOException
*/
public void initialize() throws SQLException, IOException;
}