protected DataRasterReader findDataRasterReader(Object source, AVList parameters)
{
if (source == null)
{
String message = Logging.getMessage("nullValue.SourceIsNull");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
parameters = (null == parameters) ? new AVListImpl() : parameters;
DataRasterReader reader = this.readerFactory.findReaderFor(source, parameters);
if (reader == null)
{
return(null);
}
if (!params.hasKey(AVKey.PIXEL_FORMAT))
{
try
{
reader.readMetadata(source, parameters);
}
catch (Exception e)
{
// Reading the input source's metadata caused an exception. This exception does not prevent us from
// determining if the source represents elevation data, but we want to make a note of it. Therefore we
// log the exception with level FINE.
String message = Logging.getMessage("generic.ExceptionWhileReading", source);
Logging.logger().finest(message);
}
}
return(reader);
}
/**
* Reads XML document and extracts raster sources
*
* @param config Parsed configuration document.
*
* @return TRUE, if all raster sources are available, FALSE otherwise
*
*/
protected bool readRasterSources(RasterServerConfiguration config)
{
long startTime = System.currentTimeMillis();
bool hasUnavailableRasterSources = false;
int numSources = 0;
Sector extent = null;
try
{
List <RasterServerConfiguration.Source> sources = config.getSources();
if (sources == null || sources.size() == 0)
{
return(false);
}
numSources = sources.size();
foreach (RasterServerConfiguration.Source source in sources)
{
Thread.yield();
try
{
String rasterSourcePath = source.getPath();
if (WWUtil.isEmpty(rasterSourcePath))
{
continue;
}
AVList rasterMetadata = new AVListImpl();
File rasterSourceFile = new File(rasterSourcePath);
// normalize
rasterSourcePath = rasterSourceFile.getAbsolutePath();
if (!rasterSourceFile.exists())
{
hasUnavailableRasterSources = true;
String reason = Logging.getMessage("generic.FileDoesNotExists", rasterSourcePath);
Logging.logger().warning(reason);
continue;
}
if (!rasterSourceFile.canRead())
{
hasUnavailableRasterSources = true;
String reason = Logging.getMessage("generic.FileNoReadPermission", rasterSourcePath);
Logging.logger().warning(reason);
continue;
}
DataRasterReader rasterReader = this.findDataRasterReader(rasterSourceFile, rasterMetadata);
if (null == rasterReader)
{
hasUnavailableRasterSources = true;
String reason = Logging.getMessage("generic.UnknownFileFormatOrMatchingReaderNotFound",
rasterSourcePath);
Logging.logger().warning(reason);
continue;
}
Sector sector = source.getSector();
if (null == sector)
{
rasterReader.readMetadata(rasterSourceFile, rasterMetadata);
Object o = rasterMetadata.getValue(AVKey.SECTOR);
sector = (o is Sector) ? (Sector)o : null;
}
else
{
rasterMetadata.setValue(AVKey.SECTOR, sector);
}
Object rasterPixelFormat = rasterMetadata.getValue(AVKey.PIXEL_FORMAT);
String datasetPixelFormat = this.getDataSetPixelFormat();
if (!WWUtil.isEmpty(datasetPixelFormat))
{
// verify all data rasters are the same type - we do not allow to mix elevations and imagery
if (!datasetPixelFormat.Equals(rasterPixelFormat))
{
hasUnavailableRasterSources = true;
String reason = Logging.getMessage("generic.UnexpectedRasterType", rasterSourcePath);
Logging.logger().warning(reason);
continue;
}
}
else
{
if (AVKey.IMAGE.Equals(rasterPixelFormat) || AVKey.ELEVATION.Equals(rasterPixelFormat))
{
this.setDataSetPixelFormat((String)rasterPixelFormat);
}
else
{
hasUnavailableRasterSources = true;
String reason = Logging.getMessage("generic.UnknownFileFormat", rasterSourcePath);
Logging.logger().warning(reason);
continue;
}
}
if (null != sector)
{
extent = Sector.union(extent, sector);
this.dataRasterList.add(
new CachedDataRaster(rasterSourceFile, rasterMetadata, rasterReader, this.getCache())
);
}
else
{
hasUnavailableRasterSources = true;
String reason = Logging.getMessage("generic.NoSectorSpecified", rasterSourcePath);
Logging.logger().warning(reason);
}
}
catch (Throwable t)
{
String message = t.getMessage();
message = (WWUtil.isEmpty(message)) ? t.getCause().getMessage() : message;
Logging.logger().log(java.util.logging.Level.WARNING, message, t);
}
}
if (null != extent && extent.getDeltaLatDegrees() > 0d && extent.getDeltaLonDegrees() > 0d)
{
this.setValue(AVKey.SECTOR, extent);
}
}
catch (Throwable t)
{
String message = t.getMessage();
message = (WWUtil.isEmpty(message)) ? t.getCause().getMessage() : message;
Logging.logger().log(java.util.logging.Level.SEVERE, message, t);
}
finally
{
Logging.logger().finest(this.getStringValue(AVKey.DISPLAY_NAME) + ": " + numSources
+ " files in " + (System.currentTimeMillis() - startTime) + " milli-seconds");
}
return(!hasUnavailableRasterSources);
}
/** * Create a cached data raster. * * @param source the location of the local file, expressed as either a String path, a File, or a file URL. * @param parameters metadata as AVList, it is expected to next parameters: AVKey.WIDTH, AVKey.HEIGHT, AVKey.SECTOR, * AVKey.PIXEL_FORMAT. * <p/> * If any of these keys is missing, there will be an attempt made to retrieve missign metadata from * the source using the reader. * @param reader A reference to a DataRasterReader instance * @param cache A reference to a MemoryCache instance * * @throws java.io.IOException thrown if there is an error to read metadata from the source * @throws ArgumentException thrown when a source or a reader are null */ public CachedDataRaster(Object source, AVList parameters, DataRasterReader reader, MemoryCache cache)