content: /*
   * Copyright 2018 devemux86
   *
   * This program 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, either version 3 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 Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with
   * this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.oscim.tiling;
  
  import org.oscim.layers.tile.MapTile;
  
  public class OverzoomTileDataSource implements ITileDataSource {
  
      private final ITileDataSource tileDataSource;
      private final int overZoom;
  
      public OverzoomTileDataSource(ITileDataSource tileDataSource, int overZoom) {
          this.tileDataSource = tileDataSource;
          this.overZoom = overZoom;
      }
  
      public ITileDataSource getDataSource() {
          return tileDataSource;
      }
  
      @Override
      public void query(MapTile tile, ITileDataSink sink) {
          MapTile mapTile = tile;
          ITileDataSink dataSink = sink;
          int diff = tile.zoomLevel - overZoom;
          if (diff > 0) {
              mapTile = new MapTile(tile.node, tile.tileX >> diff, tile.tileY >> diff, overZoom);
              dataSink = new OverzoomDataSink(sink, mapTile, tile);
          }
          tileDataSource.query(mapTile, dataSink);
      }
  
      @Override
      public void dispose() {
          tileDataSource.dispose();
      }
  
      @Override
      public void cancel() {
          tileDataSource.cancel();
      }
  }
  