private java.nio.ByteBuffer readElevations(Object source) throws java.io.IOException {
if (!(source instanceof java.io.File) && !(source instanceof java.net.URL)) {
String message = Logging.getMessage("DataRaster.CannotRead", source);
Logging.logger().severe(message);
throw new java.io.IOException(message);
}
if (source instanceof java.io.File) {
java.io.File file = (java.io.File) source;
// handle .bil.zip, .bil16.zip, and .bil32.gz files
if (file.getName().toLowerCase().endsWith(".zip")) {
return WWIO.readZipEntryToBuffer(file, null);
}
// handle bil.gz, bil16.gz, and bil32.gz files
else if (file.getName().toLowerCase().endsWith(".gz")) {
return WWIO.readGZipFileToBuffer(file);
} else if (!this.isMapLargeFiles() || (this.getLargeFileThreshold() > file.length())) {
return WWIO.readFileToBuffer(file);
} else {
return WWIO.mapFile(file);
}
} else // (source instanceof java.net.URL)
{
java.net.URL url = (java.net.URL) source;
return WWIO.readURLContentToBuffer(url);
}
}
protected static String buildLocationPath(String property, String append, String wwDir) {
String path = propertyToPath(property);
if (append != null && append.length() != 0) path = WWIO.appendPathPart(path, append.trim());
if (wwDir != null && wwDir.length() != 0) path = WWIO.appendPathPart(path, wwDir.trim());
return path;
}
protected static String normalizeFileStoreName(String fileName) {
// Convert all file separators to forward slashes, and strip any leading or trailing file
// separators
// from the path.
String normalizedName = fileName.replaceAll("\\\\", "/");
normalizedName = WWIO.stripLeadingSeparator(normalizedName);
normalizedName = WWIO.stripTrailingSeparator(normalizedName);
return normalizedName;
}
protected void saveBuffer(java.nio.ByteBuffer buffer, java.io.File outFile)
throws java.io.IOException {
synchronized (this.fileLock) // sychronized with read of file in RequestTask.run()
{
WWIO.saveBuffer(buffer, outFile);
}
}
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 ComposeImageTile(Sector sector, String mimeType, Level level, int width, int height)
throws IOException {
super(sector, level, -1, -1); // row and column aren't used and need to signal that
this.width = width;
this.height = height;
this.file =
File.createTempFile(WWIO.DELETE_ON_EXIT_PREFIX, WWIO.makeSuffixForMimeType(mimeType));
}
@Override
protected ByteBuffer handleXMLContent() throws IOException {
// Check for an exception report
String s = WWIO.byteBufferToString(this.getRetriever().getBuffer(), 1024, null);
if (s.contains("<ExceptionReport>")) {
// TODO: Parse the xml and include only the message text in the log message.
StringBuilder sb = new StringBuilder(this.getRetriever().getName());
sb.append("\n");
sb.append(WWIO.byteBufferToString(this.getRetriever().getBuffer(), 2048, null));
Logging.logger().warning(sb.toString());
return null;
}
this.saveBuffer();
return this.getRetriever().getBuffer();
}
/**
* Determine if a host is reachable by attempting to resolve the host name, and then attempting to
* open a connection.
*
* @param hostName Name of the host to connect to.
* @return {@code true} if a the host is reachable, {@code false} if the host name cannot be
* resolved, or if opening a connection to the host fails.
*/
protected static boolean isHostReachable(String hostName) {
try {
// Assume host is unreachable if we can't get its dns entry without getting an exception
//noinspection ResultOfMethodCallIgnored
InetAddress.getByName(hostName);
} catch (UnknownHostException e) {
String message = Logging.getMessage("NetworkStatus.UnreachableTestHost", hostName);
Logging.verbose(message);
return false;
} catch (Exception e) {
String message = Logging.getMessage("NetworkStatus.ExceptionTestingHost", hostName);
Logging.verbose(message);
return false;
}
// Was able to get internet address, but host still might not be reachable because the address
// might have been
// cached earlier when it was available. So need to try something else.
URLConnection connection = null;
try {
URL url = new URL("http://" + hostName);
Proxy proxy = WWIO.configureProxy();
if (proxy != null) connection = url.openConnection(proxy);
else connection = url.openConnection();
connection.setConnectTimeout(2000);
connection.setReadTimeout(2000);
String ct = connection.getContentType();
if (ct != null) return true;
} catch (IOException e) {
String message = Logging.getMessage("NetworkStatus.ExceptionTestingHost", hostName);
Logging.info(message);
} finally {
if (connection instanceof HttpURLConnection) ((HttpURLConnection) connection).disconnect();
}
return false;
}