# Package org.apache.storm.trident.operation.builtin

- Class Summary
  Class | Description
  --- | ---
  ComparisonAggregator<T> | Abstract `Aggregator` for comparing two values in a stream.
  ComparisonAggregator.State |
  Count |
  Debug | Filter for debugging purposes.
  Equals |
  FilterNull | Simple `Filter` implementation that filters out any tuples that have fields with a value of `null`.
  FirstN | An `Assembly` implementation.
  FirstN.FirstNAgg |
  FirstN.FirstNSortedAgg |
  MapGet |
  Max | This aggregator computes the maximum of aggregated tuples in a stream.
  MaxWithComparator<T> | This aggregator computes the maximum of aggregated tuples in a stream.
  Min | This aggregator computes the minimum of aggregated tuples in a stream.
  MinWithComparator<T> | This aggregator computes the minimum of aggregated tuples in a stream.
  Negate | A `Filter` implementation that inverts another delegate `Filter`.
  SnapshotGet |
  Sum |
  TupleCollectionGet |