protected boolean loadTile(Tile tile, java.net.URL url) { if (WWIO.isFileOutOfDate(url, this.placeNameServiceSet.getExpiryTime())) { // The file has expired. Delete it then request download of newer. this.getDataFileStore().removeFile(url); String message = Logging.getMessage("generic.DataFileExpired", url); Logging.logger().fine(message); return false; } PlaceNameChunk tileData; synchronized (this.fileLock) { tileData = readTileData(tile, url); } if (tileData == null) { // Assume that something's wrong with the file and delete it. this.getDataFileStore().removeFile(url); tile.getPlaceNameService() .markResourceAbsent(tile.getPlaceNameService().getTileNumber(tile.row, tile.column)); String message = Logging.getMessage("generic.DeletedCorruptDataFile", url); Logging.logger().fine(message); return false; } tile.setDataChunk(tileData); WorldWind.getMemoryCache(Tile.class.getName()).add(tile.getFileCachePath(), tile); return true; }
public void run() { if (this.tile.isTileInMemoryWithData()) return; final java.net.URL tileURL = this.layer.getDataFileStore().findFile(tile.getFileCachePath(), false); if (tileURL != null) { if (this.layer.loadTile(this.tile, tileURL)) { tile.getPlaceNameService() .unmarkResourceAbsent( tile.getPlaceNameService().getTileNumber(tile.row, tile.column)); this.layer.firePropertyChange(AVKey.LAYER, null, this); return; } } this.layer.downloadTile(this.tile); }
protected void drawOrRequestTile( DrawContext dc, Tile tile, double minDisplayDistanceSquared, double maxDisplayDistanceSquared) { if (!isTileVisible(dc, tile, minDisplayDistanceSquared, maxDisplayDistanceSquared)) return; if (tile.isTileInMemoryWithData()) { PlaceNameChunk placeNameChunk = tile.getDataChunk(); if (placeNameChunk.numEntries > 0) { Iterable<GeographicText> renderIter = placeNameChunk.makeIterable(dc); this.placeNameRenderer.render(dc, renderIter); } return; } // Tile's data isn't available, so request it if (!tile.getPlaceNameService() .isResourceAbsent(tile.getPlaceNameService().getTileNumber(tile.row, tile.column))) { this.requestTile(dc, tile); } }
protected static PlaceNameChunk readTileData(Tile tile, java.net.URL url) { java.io.InputStream is = null; try { String path = url.getFile(); path = path.replaceAll( "%20", " "); // TODO: find a better way to get a path usable by FileInputStream java.io.FileInputStream fis = new java.io.FileInputStream(path); java.io.BufferedInputStream buf = new java.io.BufferedInputStream(fis); is = new java.util.zip.GZIPInputStream(buf); GMLPlaceNameSAXHandler handler = new GMLPlaceNameSAXHandler(); javax.xml.parsers.SAXParserFactory.newInstance().newSAXParser().parse(is, handler); return handler.createPlaceNameChunk(tile.getPlaceNameService()); } catch (Exception e) { // todo log actual error Logging.logger() .log( Level.FINE, Logging.getMessage( "layers.PlaceNameLayer.ExceptionAttemptingToReadFile", url.toString()), e); } finally { try { if (is != null) is.close(); } catch (java.io.IOException e) { Logging.logger() .log( Level.FINE, Logging.getMessage( "layers.PlaceNameLayer.ExceptionAttemptingToReadFile", url.toString()), e); } } return null; }