// Recursively compute size of the dds to be returned
private long computeSize(DConstructor ctor, boolean isAscii) throws Exception {
long projectsize = 0; // accumulate size of projected variables
long othersize = 0; // accumulate size of non-projected variables
long fieldsize = 0;
int projectedcount = 0;
int fieldcount = 0;
Enumeration vars = ctor.getVariables();
while (vars.hasMoreElements()) {
fieldcount++;
BaseType field = (BaseType) vars.nextElement();
fieldsize = computeFieldSize(field, isAscii);
// accumulate the field sizes
if (field.isProject()) {
projectsize += fieldsize;
projectedcount++;
} else {
othersize += fieldsize;
}
}
// Cases to consider:
// 1. If all of the fields of this ctor are projected,
// then return projectsize
// 2. If none of the fields of this ctor are projected,
// then return othersize
// 3. otherwise, at least one field, but not all, is projected,
// => return projectsize;
if (projectedcount == fieldcount) return projectsize;
else if (projectedcount == 0) return othersize;
else {
assert (projectedcount > 0 && projectedcount < fieldcount);
return projectsize;
}
}
/**
* Eliminates array dimensions whose dimensions are 1 (and thus in practice don't exisit)
*
* @param dds The DDS to traverse and squeeze its member arrays.
*/
public static void squeezeArrays(DConstructor dds) {
DArray a;
Enumeration e = dds.getVariables();
while (e.hasMoreElements()) {
opendap.dap.BaseType bt = (opendap.dap.BaseType) e.nextElement();
if (bt instanceof DArray) {
a = (DArray) bt;
log.debug("Squeezing array " + a.getTypeName() + " " + a.getLongName() + ";");
a.squeeze();
// System.out.print("Post squeezing: ");
// a.printDecl(System.out);
bt = a.getPrimitiveVector().getTemplate();
if (bt instanceof DConstructor) squeezeArrays((DConstructor) bt);
} else if (bt instanceof DConstructor) {
squeezeArrays((DConstructor) bt);
}
}
}
