long computeFieldSize(BaseType bt, boolean isAscii) throws Exception {
long fieldsize = 0;
// Figure out what this field is (e.g. primitive or not)
// Somewhat convoluted.
if (bt instanceof DConstructor) {
// simple struct, seq, or grid => recurse
fieldsize = computeSize((DConstructor) bt, isAscii);
} else if (bt instanceof DArray) {
SDArray da = (SDArray) bt;
// Separate structure arrays from primitive arrays
if (da.getContainerVar() instanceof DPrimitive) {
fieldsize = computeArraySize(da);
} else if (da.getContainerVar() instanceof DStructure) {
fieldsize = computeSize((DStructure) da.getContainerVar(), isAscii); // recurse
} else { // Some kind of problem
throw new NoSuchTypeException("Computesize: unexpected type for " + bt.getLongName());
}
} else if (bt instanceof DPrimitive) {
DPrimitive dp = (DPrimitive) bt;
if (dp instanceof DString) {
String v = ((DString) dp).getValue();
fieldsize = (v == null ? 0 : v.length());
} else {
DataType dtype = DODSNetcdfFile.convertToNCType(bt);
fieldsize = dtype.getSize();
}
} else { // Some kind of problem
throw new NoSuchTypeException("Computesize: unknown type for " + bt.getLongName());
}
return fieldsize;
}
long computeArraySize(SDArray da) throws Exception {
assert (da.getContainerVar() instanceof DPrimitive);
BaseType base = da.getPrimitiveVector().getTemplate();
DataType dtype = DODSNetcdfFile.convertToNCType(base);
int elemSize = dtype.getSize();
int n = da.numDimensions();
List<Range> ranges = new ArrayList<Range>(n);
long size = 0;
for (int i = 0; i < n; i++) {
ranges.add(new Range(da.getStart(i), da.getStop(i), da.getStride(i)));
Section s = new Section(ranges);
size += s.computeSize() * elemSize;
}
return size;
}