public static byte[] getImage(int x, int y, int zoom, HttpMapSource mapSource)
throws IOException, InterruptedException, UnrecoverableDownloadException {
MapSpace mapSpace = mapSource.getMapSpace();
int maxTileIndex = mapSpace.getMaxPixels(zoom) / mapSpace.getTileSize();
if (x > maxTileIndex)
throw new RuntimeException("Invalid tile index x=" + x + " for zoom " + zoom);
if (y > maxTileIndex)
throw new RuntimeException("Invalid tile index y=" + y + " for zoom " + zoom);
TileStore ts = TileStore.getInstance();
// Thread.sleep(2000);
// Test code for creating random download failures
// if (Math.random()>0.7) throw new
// IOException("intentionally download error");
Settings s = Settings.getInstance();
TileStoreEntry tile = null;
if (s.tileStoreEnabled) {
// Copy the file from the persistent tilestore instead of
// downloading it from internet.
tile = ts.getTile(x, y, zoom, mapSource);
boolean expired = isTileExpired(tile);
if (tile != null) {
if (expired) {
log.trace("Expired: " + mapSource.getName() + " " + tile);
} else {
log.trace("Tile of map source " + mapSource.getName() + " used from tilestore");
byte[] data = tile.getData();
notifyCachedTileUsed(data.length);
return data;
}
}
}
byte[] data = null;
if (tile == null) {
data = downloadTileAndUpdateStore(x, y, zoom, mapSource);
notifyTileDownloaded(data.length);
} else {
byte[] updatedData = updateStoredTile(tile, mapSource);
if (updatedData != null) {
data = updatedData;
notifyTileDownloaded(data.length);
} else {
data = tile.getData();
notifyCachedTileUsed(data.length);
}
}
return data;
}
public BufferedImage getTileImage(int zoom, int x, int y, LoadMethod loadMethod)
throws IOException, InterruptedException, TileException {
BufferedImage image = null;
Graphics2D g2 = null;
try {
ArrayList<BufferedImage> layerImages = new ArrayList<BufferedImage>(mapSources.length);
int maxSize = mapSpace.getTileSize();
for (int i = 0; i < mapSources.length; i++) {
MapSource layerMapSource = mapSources[i];
BufferedImage layerImage = layerMapSource.getTileImage(zoom, x, y, loadMethod);
if (layerImage != null) {
log.debug("Multi layer loading: " + layerMapSource + " " + x + " " + y + " " + zoom);
layerImages.add(layerImage);
int size = layerImage.getWidth();
if (size > maxSize) {
maxSize = size;
}
}
}
image = new BufferedImage(maxSize, maxSize, BufferedImage.TYPE_3BYTE_BGR);
g2 = image.createGraphics();
g2.setColor(getBackgroundColor());
g2.fillRect(0, 0, maxSize, maxSize);
for (int i = 0; i < layerImages.size(); i++) {
BufferedImage layerImage = layerImages.get(i);
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, getLayerAlpha(i)));
g2.drawImage(layerImage, 0, 0, maxSize, maxSize, null);
}
return image;
} finally {
if (g2 != null) {
g2.dispose();
}
}
}