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; }