io.druid.common.guava

Class CombiningSequence<T>

java.lang.Object

io.druid.common.guava.CombiningSequence<T>

All Implemented Interfaces:

Sequence<T>

public class CombiningSequence<T>
extends Object
implements Sequence<T>

Method Summary

Modifier and Type	Method and Description
<OutType> OutType	accumulate(OutType initValue, Accumulator<OutType,T> accumulator) Accumulate this sequence using the given accumulator.
static <T> CombiningSequence<T>	create(Sequence<T> baseSequence, com.google.common.collect.Ordering<T> ordering, BinaryFn<T,T,T> mergeFn)
<OutType> Yielder<OutType>	toYielder(OutType initValue, YieldingAccumulator<OutType,T> accumulator) Return an Yielder for accumulated sequence.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static <T> CombiningSequence<T> create(Sequence<T> baseSequence,
                                              com.google.common.collect.Ordering<T> ordering,
                                              BinaryFn<T,T,T> mergeFn)

accumulate

public <OutType> OutType accumulate(OutType initValue,
                                    Accumulator<OutType,T> accumulator)

Description copied from interface: Sequence

Accumulate this sequence using the given accumulator.

Specified by:

accumulate in interface Sequence<T>

Type Parameters:

OutType - the type of accumulated value.

Parameters:

initValue - the initial value to pass along to start the accumulation.

accumulator - the accumulator which is responsible for accumulating input values.

Returns:

accumulated value.

toYielder

public <OutType> Yielder<OutType> toYielder(OutType initValue,
                                            YieldingAccumulator<OutType,T> accumulator)

Description copied from interface: Sequence

Return an Yielder for accumulated sequence.

Specified by:

toYielder in interface Sequence<T>

Type Parameters:

OutType - the type of accumulated value.

Parameters:

initValue - the initial value to pass along to start the accumulation.

accumulator - the accumulator which is responsible for accumulating input values.

Returns:

an Yielder for accumulated sequence.

See Also:

Yielder