Package org.hibernate.search.engine.search.projection.spi

Interface ProjectionAccumulator.Provider<U,R>

Type Parameters:

U - The type of values to accumulate after being transformed.

R - The type of the final result containing values of type V.

All Superinterfaces:

ProjectionCollector.Provider<U,R>

Enclosing interface:

ProjectionAccumulator<E,V,A,R>

public static interface ProjectionAccumulator.Provider<U,R>
extends ProjectionCollector.Provider<U,R>

Provides an accumulator for a given type of values to accumulate (T).

The provider may always return the same accumulator, if generics are irrelevant and it's safe to do so.

Method Summary

Modifier and Type	Method	Description
<T> ProjectionAccumulator<T,U,?,R>	get()
boolean	isSingleValued()

Method Details

get

<T> ProjectionAccumulator<T,U,?,R> get()

Specified by:

get in interface ProjectionCollector.Provider<U,R>

Type Parameters:

T - The type of values to accumulate before being transformed.

Returns:

An accumulator for the given type.

isSingleValued

boolean isSingleValued()

Specified by:

isSingleValued in interface ProjectionCollector.Provider<U,R>

Returns:

true if accumulators returned by get() can only accept a single value, and will fail beyond that.