source: osm/applications/editors/josm/plugins/ElevationProfile/src/org/openstreetmap/josm/plugins/elevation/grid/ElevationGridTileLoader.java@ 31089

// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.plugins.elevation.grid;

import org.openstreetmap.gui.jmapviewer.Tile;
import org.openstreetmap.gui.jmapviewer.interfaces.TileJob;
import org.openstreetmap.gui.jmapviewer.interfaces.TileLoader;
import org.openstreetmap.gui.jmapviewer.interfaces.TileLoaderListener;
import org.openstreetmap.josm.tools.CheckParameterUtil;

/**
 * @author Olli
 *
 */
public class ElevationGridTileLoader implements TileLoader {
        protected TileLoaderListener listener;

        public ElevationGridTileLoader(TileLoaderListener listener) {
                CheckParameterUtil.ensureParameterNotNull(listener);
                this.listener = listener;
        }

        @Override
        public TileJob createTileLoaderJob(final Tile tile) {
                CheckParameterUtil.ensureParameterNotNull(tile);

                return new TileJob() {

                        @Override
                        public void run() {
                                synchronized (tile) {
                                        if ((tile.isLoaded() && !tile.hasError()) || tile.isLoading())
                                                return;
                                        tile.initLoading();
                                }
                                try {
                                        tile.loadImage(null);
                                        tile.setLoaded(true);
                                        listener.tileLoadingFinished(tile, true);
                                } catch (Exception e) {
                                        tile.setError(e.getMessage());
                                        listener.tileLoadingFinished(tile, false);
                                } finally {
                                        tile.finishLoading();
                                }
                        }

                        @Override
                        public Tile getTile() {
                                return tile;
                        }

                        @Override
                        public void submit() {
                                run();
                        }
                };
        }

}