Application: gvSIG desktop » gvSIG raster

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.raster.wmts.io.downloader;

import java.io.File;

import java.io.IOException;

import java.net.ConnectException;

import java.net.URL;

import org.gvsig.compat.net.ICancellable;

import org.gvsig.fmap.dal.coverage.exception.RemoteServiceException;

import org.gvsig.raster.cache.tile.Tile;

import org.gvsig.raster.cache.tile.exception.TileGettingException;

import org.gvsig.raster.impl.provider.tile.BaseTileDownloader;

import org.gvsig.raster.wmts.io.WMTSConnector;

import org.gvsig.raster.wmts.io.WMTSDataParameters;

import org.gvsig.raster.wmts.io.WMTSProvider;

import org.gvsig.raster.wmts.ogc.WMTSStatus;

import org.gvsig.raster.wmts.ogc.exception.ServerErrorException;

import org.gvsig.raster.wmts.ogc.exception.WMTSException;

/** 

 * Tile getter 

 * @author Nacho Brodin (nachobrodin@gmail.com)

 */

public class TileDownloaderForWMTS extends BaseTileDownloader {

        private WMTSConnector             connector  = null;

        public TileDownloaderForWMTS(WMTSProvider prov, 

                        int tilePxWidth,

                        int tilePxHeight) {

                super(prov, tilePxWidth, tilePxHeight);

        }

        /**

         * Gets the connector from the URL

         * @return

         * @throws RemoteServiceException

         */

        public WMTSConnector getConnector() throws WMTSException {

                if(connector == null) {

                        WMTSDataParameters p = (WMTSDataParameters)prov.getDataParameters();

                        connector = p.getConnector();

                        if(connector != null)

                                return connector;

                        URL url = null;

                        try {

                                url = new URL(p.getURI());

                        } catch (Exception e) {

                                throw new WMTSException("Malformed URL",e);

                        }

                        try {

                                connector = new WMTSConnector(url);

                                connector.connect(new ICancellable() {

                                        public boolean isCanceled() {

                                                return false;

                                        }

                                        public Object getID() {

                                                return null;

                                        }

                                });

                        } catch (ConnectException e) {

                                throw new WMTSException("Connect exception",e);

                        } catch (IOException e) {

                                throw new WMTSException("Connect exception",e);

                        }

                }

                return connector;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.raster.cache.tile.provider.Downloader#getTile(org.gvsig.raster.cache.tile.Tile)

         */

        public synchronized Tile downloadTile(Tile tile) throws TileGettingException {

                try {

                        WMTSStatus status = (WMTSStatus)tile.getDownloaderParams("WMTSStatus");

                        status.setTileRow(tile.getRow());

                        status.setTileCol(tile.getCol());

                        File f = getConnector().getTile(status, tile.getCancelled(), tile.getFile());

                        tile.setFile(f);

                        //Si borramos el rmf no se puede leer la etiqueta Alpha. En caso de que se modifique jgdal para

                        //poder guardar esta etiqueta deberiamos borrar el rmf para ahorrar ficheros

                        //File rmf = new File(tile.getFile().getAbsolutePath() + ".rmf");

                        //if(rmf.exists())

                                //rmf.delete();

                } catch (WMTSException e) {

                        throw new TileGettingException(e);

                } catch (ServerErrorException e) {

                        throw new TileGettingException(e);

                }

                readTileFromDisk(tile);

                return tile;

        }

}