private static List<Serializable> combineAggregationResults(
BrokerRequest brokerRequest,
List<Serializable> aggregationResult1,
List<Serializable> aggregationResult2) {
if (aggregationResult1 == null) {
return aggregationResult2;
}
if (aggregationResult2 == null) {
return aggregationResult1;
}
List<List<Serializable>> aggregationResultsList = new ArrayList<List<Serializable>>();
for (int i = 0; i < brokerRequest.getAggregationsInfoSize(); ++i) {
aggregationResultsList.add(new ArrayList<Serializable>());
if (aggregationResult1.get(i) != null) {
aggregationResultsList.get(i).add(aggregationResult1.get(i));
}
if (aggregationResult2.get(i) != null) {
aggregationResultsList.get(i).add(aggregationResult2.get(i));
}
}
List<Serializable> retAggregationResults = new ArrayList<Serializable>();
List<AggregationFunction> aggregationFunctions =
AggregationFunctionFactory.getAggregationFunction(brokerRequest);
for (int i = 0; i < aggregationFunctions.size(); ++i) {
retAggregationResults.add(
(Serializable)
aggregationFunctions
.get(i)
.combine(aggregationResultsList.get(i), CombineLevel.INSTANCE)
.get(0));
}
return retAggregationResults;
}
