Package com.apple.foundationdb.record.provider.foundationdb

Class IndexAggregateGroupKeys.Conditions

java.lang.Object

com.apple.foundationdb.record.provider.foundationdb.IndexAggregateGroupKeys

com.apple.foundationdb.record.provider.foundationdb.IndexAggregateGroupKeys.Conditions

Enclosing class:

IndexAggregateGroupKeys

@API(EXPERIMENTAL)
protected static class IndexAggregateGroupKeys.Conditions
extends IndexAggregateGroupKeys

Nested Class Summary

Nested classes/interfaces inherited from class com.apple.foundationdb.record.provider.foundationdb.IndexAggregateGroupKeys

IndexAggregateGroupKeys.Conditions, IndexAggregateGroupKeys.IndexScan

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Conditions(List<Comparisons.Comparison> comparisons)

Method Summary

Modifier and Type	Method	Description
int	getColumnSize()	Get the size of the prefix of the index aggregate that is returned.
Key.Evaluated	getGroupKeys(FDBRecordStoreBase<?> store, EvaluationContext context)	Get the grouping key (GROUP BY) for the index aggregate from the given context.

Methods inherited from class com.apple.foundationdb.record.provider.foundationdb.IndexAggregateGroupKeys

conditionsToGroupKeys, conditionsToGroupKeys, indexScanToGroupKeys

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Conditions

protected Conditions(@Nonnull
                     List<Comparisons.Comparison> comparisons)

Method Detail

getGroupKeys

@Nonnull
public Key.Evaluated getGroupKeys(@Nullable
                                  FDBRecordStoreBase<?> store,
                                  @Nullable
                                  EvaluationContext context)

Description copied from class: IndexAggregateGroupKeys

Get the grouping key (GROUP BY) for the index aggregate from the given context.

Specified by:

getGroupKeys in class IndexAggregateGroupKeys

Parameters:

store - the record store for the query

context - context in which to evaluate keys

Returns:

the grouping key

getColumnSize

public int getColumnSize()

Description copied from class: IndexAggregateGroupKeys

Get the size of the prefix of the index aggregate that is returned. That is, the size of {#link #getGroupKeys}.

Specified by:

getColumnSize in class IndexAggregateGroupKeys

Returns:

number of items in the grouping key