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;
}
