// Check if this UDF has been provided with type params for the output char type
SettableHiveCharObjectInspector outputOI;
outputOI = (SettableHiveCharObjectInspector)
PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(typeInfo);
converter = new HiveCharConverter(argumentOI, outputOI);
return outputOI;
}