[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

Maintains aggregation state applying values as entering and leaving the state.

Implementations must also act as a factory for further independent copies of aggregation states such that new aggregation state holders and be created from a prototype.

The following tables list the members exposed by the Aggregator type.

Public Methods

  NameDescription
Enter
Apply the value as entering aggregation (entering window). The value can be null since 'null' values may be counted as unique separate values.

Leave
Apply the value as leaving aggregation (leaving window). The value can be null since 'null' values may be counted as unique separate values.

NewAggregator
Make a new, initalized aggregation state.

Public Properties

  NameDescription
Value
Returns the current value held.

ValueType
Returns the type of the current value.