/**
* Returns a {@link RasterLayerResponse} from the specified {@link RasterLayerRequest}.
*
* @param request a previously set {@link RasterLayerRequest} defining a set of parameters to get
* a specific coverage
* @return the computed {@code RasterLayerResponse}
* @todo Future versions may cache requestes<->responses using hashing
*/
private RasterLayerResponse requestCoverage(RasterLayerRequest request) {
final RasterLayerResponse response =
new RasterLayerResponse(request, coverageFactory, readerSPI);
try {
response.compute();
} catch (IOException e) {
LOGGER.log(Level.SEVERE, e.getLocalizedMessage(), e);
return null;
}
return response;
}
/**
* Returns a {@link GridCoverage} from this reader in compliance with the specified parameters.
*
* @param params a {@code GeneralParameterValue} array to customize the read operation.
*/
public GridCoverage2D read(GeneralParameterValue[] params)
throws IllegalArgumentException, IOException {
// Setup a new coverage request
final RasterLayerRequest request = new RasterLayerRequest(params, this);
// compute the request.
final RasterLayerResponse response = requestCoverage(request);
if (response != null) return (GridCoverage2D) response.getGridCoverage();
return null;
}
