public ByteBuffer run(Retriever retriever) {
if (!retriever.getState().equals(Retriever.RETRIEVER_STATE_SUCCESSFUL)) return null;
HTTPRetriever htr = (HTTPRetriever) retriever;
if (htr.getResponseCode() == HttpURLConnection.HTTP_NO_CONTENT) {
// Mark tile as missing to avoid excessive attempts
MercatorTiledImageLayer.this.levels.markResourceAbsent(tile);
return null;
}
if (htr.getResponseCode() != HttpURLConnection.HTTP_OK) return null;
URLRetriever r = (URLRetriever) retriever;
ByteBuffer buffer = r.getBuffer();
String suffix = WWIO.makeSuffixForMimeType(htr.getContentType());
if (suffix == null) {
return null; // TODO: log error
}
String path = tile.getPath().substring(0, tile.getPath().lastIndexOf("."));
path += suffix;
final File outFile = WorldWind.getDataFileStore().newFile(path);
if (outFile == null) return null;
try {
WWIO.saveBuffer(buffer, outFile);
return buffer;
} catch (IOException e) {
e.printStackTrace(); // TODO: log error
return null;
}
}
private BufferedImage requestImage(MercatorTextureTile tile, String mimeType)
throws URISyntaxException {
String pathBase = tile.getPath().substring(0, tile.getPath().lastIndexOf("."));
String suffix = WWIO.makeSuffixForMimeType(mimeType);
String path = pathBase + suffix;
URL url = WorldWind.getDataFileStore().findFile(path, false);
if (url == null) // image is not local
return null;
if (WWIO.isFileOutOfDate(url, tile.getLevel().getExpiryTime())) {
// The file has expired. Delete it.
WorldWind.getDataFileStore().removeFile(url);
String message = Logging.getMessage("generic.DataFileExpired", url);
Logging.logger().fine(message);
} else {
try {
File imageFile = new File(url.toURI());
BufferedImage image = ImageIO.read(imageFile);
if (image == null) {
String message = Logging.getMessage("generic.ImageReadFailed", imageFile);
throw new RuntimeException(message);
}
this.levels.unmarkResourceAbsent(tile);
return image;
} catch (IOException e) {
// Assume that something's wrong with the file and delete it.
gov.nasa.worldwind.WorldWind.getDataFileStore().removeFile(url);
this.levels.markResourceAbsent(tile);
String message = Logging.getMessage("generic.DeletedCorruptDataFile", url);
Logging.logger().info(message);
}
}
return null;
}
private BufferedImage getImage(MercatorTextureTile tile, String mimeType) throws Exception {
// Read the image from disk.
BufferedImage image = this.requestImage(tile, mimeType);
if (image != null) return image;
// Retrieve it from the net since it's not on disk.
this.downloadImage(tile, mimeType);
// Try to read from disk again after retrieving it from the net.
image = this.requestImage(tile, mimeType);
if (image == null) {
String message =
Logging.getMessage("layers.TiledImageLayer.ImageUnavailable", tile.getPath());
throw new RuntimeException(message);
}
return image;
}
public BufferedImage composeImageForSector(
Sector sector,
int imageWidth,
int imageHeight,
int levelNumber,
String mimeType,
boolean abortOnError,
BufferedImage image) {
if (sector == null) {
String message = Logging.getMessage("nullValue.SectorIsNull");
Logging.logger().severe(message);
throw new IllegalStateException(message);
}
if (levelNumber < 0) {
levelNumber = this.levels.getLastLevel().getLevelNumber();
} else if (levelNumber > this.levels.getLastLevel().getLevelNumber()) {
Logging.logger()
.warning(
Logging.getMessage(
"generic.LevelRequestedGreaterThanMaxLevel",
levelNumber,
this.levels.getLastLevel().getLevelNumber()));
levelNumber = this.levels.getLastLevel().getLevelNumber();
}
MercatorTextureTile[][] tiles = this.getTilesInSector(sector, levelNumber);
if (tiles.length == 0 || tiles[0].length == 0) {
Logging.logger().severe(Logging.getMessage("layers.TiledImageLayer.NoImagesAvailable"));
return null;
}
if (image == null)
image = new BufferedImage(imageWidth, imageHeight, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
for (MercatorTextureTile[] row : tiles) {
for (MercatorTextureTile tile : row) {
if (tile == null) continue;
BufferedImage tileImage;
try {
tileImage = this.getImage(tile, mimeType);
double sh =
((double) imageHeight / (double) tileImage.getHeight())
* (tile.getSector().getDeltaLat().divide(sector.getDeltaLat()));
double sw =
((double) imageWidth / (double) tileImage.getWidth())
* (tile.getSector().getDeltaLon().divide(sector.getDeltaLon()));
double dh =
imageHeight
* (-tile.getSector().getMaxLatitude().subtract(sector.getMaxLatitude()).degrees
/ sector.getDeltaLat().degrees);
double dw =
imageWidth
* (tile.getSector().getMinLongitude().subtract(sector.getMinLongitude()).degrees
/ sector.getDeltaLon().degrees);
AffineTransform txf = g.getTransform();
g.translate(dw, dh);
g.scale(sw, sh);
g.drawImage(tileImage, 0, 0, null);
g.setTransform(txf);
} catch (Exception e) {
if (abortOnError) throw new RuntimeException(e);
String message =
Logging.getMessage("generic.ExceptionWhileRequestingImage", tile.getPath());
Logging.logger().log(java.util.logging.Level.WARNING, message, e);
}
}
}
return image;
}
