## Package cascading.operation.aggregator

Class Summary
Average: Class Average is an `Aggregator` that returns the average of all numeric values in the current group.
Average.Context: Class Context is used to hold intermediate values.
Count: Class Count is an `Aggregator` that calculates the number of items in the current group.
ExtentBase: Class ExtentBase is the base class for First and Last.
ExtremaBase: Deprecated.
ExtremaBase.Context
ExtremaValueBase: Class ExtremaValueBase is the base class for MaxValue and MinValue where the values are expected to by `Comparable` types and the `Comparable.compareTo(Object)` result is use for max/min comparison.
ExtremaValueBase.Context
First: Class First is an `Aggregator` that returns the first `Tuple` encountered in a grouping.
Last: Class Last is an `Aggregator` that returns the last `Tuple` encountered.
Max: Deprecated.
MaxValue: Class MaxValue is an `Aggregator` that returns the maximum value encountered in the current group.
Min: Deprecated.
MinValue: Class Min is an `Aggregator` that returns the minimum value encountered in the current group.
Sum: Class Sum is an `Aggregator` that returns the sum of all numeric values in the current group.

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