/**
* Get the GenericUDAF evaluator for the name and argumentClasses.
*
* @param name the name of the UDAF
* @param argumentOIs
* @param isDistinct
* @param isAllColumns
* @return The UDAF evaluator
*/
@SuppressWarnings("deprecation")
public GenericUDAFEvaluator getGenericUDAFEvaluator(
String name, List<ObjectInspector> argumentOIs, boolean isDistinct, boolean isAllColumns)
throws SemanticException {
GenericUDAFResolver udafResolver = getGenericUDAFResolver(name);
if (udafResolver == null) {
return null;
}
GenericUDAFEvaluator udafEvaluator;
ObjectInspector args[] = new ObjectInspector[argumentOIs.size()];
// Can't use toArray here because Java is dumb when it comes to
// generics + arrays.
for (int ii = 0; ii < argumentOIs.size(); ++ii) {
args[ii] = argumentOIs.get(ii);
}
GenericUDAFParameterInfo paramInfo =
new SimpleGenericUDAFParameterInfo(args, isDistinct, isAllColumns);
if (udafResolver instanceof GenericUDAFResolver2) {
udafEvaluator = ((GenericUDAFResolver2) udafResolver).getEvaluator(paramInfo);
} else {
udafEvaluator = udafResolver.getEvaluator(paramInfo.getParameters());
}
return udafEvaluator;
}
@Override
public GenericUDAFEvaluator getEvaluator(final GenericUDAFParameterInfo info)
throws SemanticException {
final ObjectInspector[] inspectors = info.getParameterObjectInspectors();
if (inspectors.length != 1) {
throw new UDFArgumentException("One argument expected");
}
if (inspectors[0].getCategory() != ObjectInspector.Category.PRIMITIVE) {
throw new UDFArgumentTypeException(
0, "Primitive argument expected, but " + inspectors[0].getTypeName() + " was recieved");
}
final PrimitiveObjectInspector inspector = (PrimitiveObjectInspector) inspectors[0];
if (inspector.getPrimitiveCategory() != PrimitiveObjectInspector.PrimitiveCategory.BINARY) {
throw new UDFArgumentTypeException(
0,
"Binary argument expected, but "
+ inspector.getPrimitiveCategory().name()
+ " was received");
}
return createEvaluator();
}