{
    "_id": "5c451b7ab5bd0fd4a6d9b4ba",
    "serviceRequestType": "Type A",
    "status": "Completed",
    "creationDate": "2014-01-18T00:00:00",
    "completionDate": "2014-01-21T00:00:00",
    "streetAddress": "5541 W CATALPA AVE"
}

Aggregation agg = newAggregation(
  group("serviceRequestType").addToSet("creationDate").as("start")
                             .addToSet("completionDate").as("end"),
  unwind("end", "endArray"),
  unwind("start", "startArray")

AggregationResults<Query4Result> result = mongoTemplate.aggregate(agg, "incidents", Query4Result.class);

return result.getMappedResults();

{_id=TypeA, start=2014-04-07T00:00:00, end=2014-05-12T00:00:00,
endArray=0, startArray=0}
{_id=TypeA, start=2014-04-06T00:00:00, end=2014-05-12T00:00:00,
endArray=0, startArray=1}
{_id=TypeA, start=2014-04-05T00:00:00, end=2014-05-12T00:00:00,
endArray=0, startArray=2}
{_id=TypeA, start=2014-04-07T00:00:00, end=2014-07-09T00:00:00,
endArray=1, startArray=0}
{_id=TypeA, start=2014-04-06T00:00:00, end=2014-07-09T00:00:00,
endArray=1, startArray=1}
{_id=TypeA, start=2014-04-05T00:00:00, end=2014-07-09T00:00:00,
endArray=1, startArray=2}


{_id=TypeB, start=2014-04-07T00:00:00, end=2014-05-23T00:00:00,
endArray=0, startArray=0}
{_id=TypeB, start=2014-04-06T00:00:00, end=2014-05-23T00:00:00,
endArray=0, startArray=1}
{_id=TypeB, start=2014-04-05T00:00:00, end=2014-05-23T00:00:00,
endArray=0, startArray=2}
{_id=TypeB, start=2014-04-07T00:00:00, end=2014-05-20T00:00:00,
endArray=1, startArray=0}
{_id=TypeB, start=2014-04-06T00:00:00, end=2014-05-20T00:00:00,
endArray=1, startArray=1}
{_id=TypeB, start=2014-04-05T00:00:00, end=2014-05-20T00:00:00,
endArray=1, startArray=2}