public void sequence(DapSequence seq) throws DapException {
List<DapVariable> fields = seq.getFields();
Odometer odom = null;
if (seq.getRank() == 0) { // scalar
odom = new ScalarOdometer();
} else { // dimensioned
List<Slice> slices = ce.getConstrainedSlices(seq);
odom = Odometer.factory(slices, seq.getDimensions(), false);
}
try {
while (odom.hasNext()) {
// Decide how many rows for this sequence
int nrows = (rowcount == 0 ? this.values.nextCount(MAXROWS) : rowcount);
writer.writeObject(DapType.INT64, (long) nrows);
for (int i = 0; i < nrows; i++) {
for (int j = 0; j < fields.size(); j++) {
DapVariable field = fields.get(j);
variable(field);
}
}
odom.next();
}
} catch (IOException ioe) {
throw new DapException(ioe);
}
}
protected static Object fieldValue(DapSequence seq, DataRecord record, String field)
throws DapException {
DapVariable dapv = seq.findByName(field);
if (dapv == null) throw new DapException("Unknown variable in filter: " + field);
if (dapv.getSort() != DapSort.ATOMICVARIABLE)
throw new DapException("Non-atomic variable in filter: " + field);
if (dapv.getRank() > 0) throw new DapException("Non-scalar variable in filter: " + field);
DataAtomic da = (DataAtomic) (record.readfield(field));
if (da == null) throw new DapException("No such field: " + field);
return da.read(0);
}