Package io.deephaven.engine.table.impl.by

Interface AggregationContextFactory

All Known Implementing Classes:

AggregationProcessor

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface AggregationContextFactory

Produces an AggregationContext for aggregations given a table and the names of the group by columns.

Method Summary

Modifier and Type	Method	Description
AggregationContext	makeAggregationContext(@NotNull Table table, boolean requireStateChangeRecorder, @NotNull String... groupByColumns)	Make an AggregationContext for this aggregation.

Method Details

makeAggregationContext

AggregationContext makeAggregationContext(@NotNull
 @NotNull Table table,
 boolean requireStateChangeRecorder,
 @NotNull
 @NotNull String... groupByColumns)

Make an AggregationContext for this aggregation.

Parameters:

table - The source Table to aggregate

requireStateChangeRecorder - Whether the resulting context is required to have an operator that extends StateChangeRecorder

groupByColumns - The key column names

Returns:

A new or safely reusable AggregationContext