Example 1 with Enhance
use of ucar.nc2.dataset.NetcdfDataset.Enhance in project ncWMS by Unidata.
the class DataChunk method readDataChunk.
/**
* Creates a DataChunk by reading from the given variable
*/
public static DataChunk readDataChunk(VariableDS var, RangesList ranges) throws IOException {
final Array arr;
Variable origVar = var.getOriginalVariable();
if (origVar == null) {
// We read from the enhanced variable
arr = readVariable(var, ranges);
} else {
// We read from the original variable to avoid enhancing data
// values that we won't use
arr = readVariable(origVar, ranges);
}
// Decide whether or not we need to enhance any data values we
// read from this array
final boolean needsEnhance;
Set<Enhance> enhanceMode = var.getEnhanceMode();
if (enhanceMode.contains(Enhance.ScaleMissingDefer)) {
// Values read from the array are not enhanced, but need to be
needsEnhance = true;
} else if (enhanceMode.contains(Enhance.ScaleMissing)) {
// We only need to enhance if we read data from the plain Variable
needsEnhance = origVar != null;
} else {
// Values read from the array will not be enhanced
needsEnhance = false;
}
return new DataChunk(var, arr, needsEnhance);
}