static QueryModelVisitor()
{
// TODO - reflection to build map
ResultOperatorMap = new ResultOperatorMap();
ResultOperatorMap.Add<AggregateResultOperator, ProcessAggregate>();
ResultOperatorMap.Add<AggregateFromSeedResultOperator, ProcessAggregateFromSeed>();
ResultOperatorMap.Add<FirstResultOperator, ProcessFirst>();
ResultOperatorMap.Add<TakeResultOperator, ProcessTake>();
ResultOperatorMap.Add<SkipResultOperator, ProcessSkip>();
ResultOperatorMap.Add<GroupResultOperator, ProcessGroupBy>();
ResultOperatorMap.Add<SingleResultOperator, ProcessSingle>();
ResultOperatorMap.Add<ContainsResultOperator, ProcessContains>();
ResultOperatorMap.Add<NonAggregatingGroupBy, ProcessNonAggregatingGroupBy>();
ResultOperatorMap.Add<ClientSideSelect, ProcessClientSideSelect>();
ResultOperatorMap.Add<AnyResultOperator, ProcessAny>();
ResultOperatorMap.Add<AllResultOperator, ProcessAll>();
ResultOperatorMap.Add<FetchOneRequest, ProcessFetchOne>();
ResultOperatorMap.Add<FetchManyRequest, ProcessFetchMany>();
ResultOperatorMap.Add<CacheableResultOperator, ProcessCacheable>();
ResultOperatorMap.Add<OfTypeResultOperator, ProcessOfType>();
ResultOperatorMap.Add<CastResultOperator, ProcessCast>();
}