@Override
public GridCoverage2D read(GeneralParameterValue[] parameters)
throws IllegalArgumentException, IOException {
File baseDir = FileUtils.createTempDirectory();
try {
File file = readToFile(baseDir, "WcsCoverageReader", parameters);
// since the requested format may be one of several we need to look
// up the format object
// for reading the coverage from the file
Format format = GridFormatFinder.findFormat(file);
if (format instanceof AbstractGridFormat && UnknownFormat.class != format.getClass()) {
AbstractGridFormat gridFormat = (AbstractGridFormat) format;
// Now we need to find the parameters provided by the caller for
// reading the coverage from the file
// See the format API for details
GeneralParameterValue[] readParams = new GeneralParameterValue[0];
try {
ParameterValueGroup group = format.getReadParameters();
List<GeneralParameterValue> list = new ArrayList<GeneralParameterValue>();
for (GeneralParameterValue paramValue : group.values()) {
list.addAll(find(paramValue, parameters));
}
LOG.debug("Reading coverage from file using parameters: " + list);
readParams = list.toArray(new GeneralParameterValue[list.size()]);
} catch (Exception e) {
// if can't configure the parameters then try to read with
// what we have been able to configure
LOG.warn("Exception occurred while getting request params for reading coverage", e);
}
AbstractGridCoverage2DReader reader = gridFormat.getReader(file);
GridCoverage2D coverage = reader.read(readParams);
return coverage;
}
throw new IllegalArgumentException(
"Current configuration is unable to read coverage of "
+ file.getName()
+ " format. "
+ "Check that you have the correct geotools plugins");
} finally {
FileUtils.delete(baseDir);
}
}
