Class AggInputSplit<I, E, K, J, O, SUBACC extends Accumulator<J,E,O>, SUBAGG extends ParallelAggregator<J,E,O,SUBACC>>

java.lang.Object

org.aksw.commons.collector.core.AggInputSplit<I,E,K,J,O,SUBACC,SUBAGG>

Type Parameters:

I -

K -

O -

SUBACC -

SUBAGG -

All Implemented Interfaces:

Serializable, Aggregator<I,E,Map<K,O>>, ParallelAggregator<I, E, Map<K,O>, AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC>>

public class AggInputSplit<I, E, K, J, O, SUBACC extends Accumulator<J,E,O>, SUBAGG extends ParallelAggregator<J,E,O,SUBACC>>
extends Object
implements ParallelAggregator<I, E, Map<K,O>, AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC>>, Serializable

An aggregator that splits the index into a set of keys and forwards the input to the sub-aggregator's accumulator for each key.

Author:

raven

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	AggInputSplit.AccInputSplit<I, E, K, J, O, SUBACC extends Accumulator<J,E,O>>
class	AggInputSplit.AccSplitInputImpl

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	considerNewKeys
protected Set<K>	fixedKeys	For those keys a fresh sub accumulator will be allocated immediately upon calling createAccumulator()
protected Function<? super I, ? extends Set<? extends K>>	keyMapper
protected SUBAGG	subAgg
protected BiFunction<? super I, ? super K, ? extends J>	valueMapper

Constructor Summary

Constructors

Constructor	Description
AggInputSplit(SUBAGG subAgg, Function<? super I, ? extends Set<? extends K>> keyMapper, BiFunction<? super I, ? super K, ? extends J> valueMapper)	Create an instance with an empty set of fixedKeys and with addition of new keys allowed
AggInputSplit(SUBAGG subAgg, Set<K> fixedKeys, boolean considerNewKeys, Function<? super I, ? extends Set<? extends K>> keyMapper, BiFunction<? super I, ? super K, ? extends J> valueMapper)

Method Summary

Modifier and Type	Method	Description
AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC>	combine(AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC> a, AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC> b)	Combine accumulators.
AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC>	createAccumulator()
boolean	equals(Object obj)
int	hashCode()

Methods inherited from class Object

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

Methods inherited from interface Aggregator

accumulateAll, accumulateAll, accumulateAll, finish

Methods inherited from interface ParallelAggregator

asCollector, asCollector, combineRaw

Field Details

fixedKeys

protected Set<K> fixedKeys

For those keys a fresh sub accumulator will be allocated immediately upon calling createAccumulator()

considerNewKeys

protected boolean considerNewKeys

keyMapper

protected Function<? super I, ? extends Set<? extends K>> keyMapper

valueMapper

protected BiFunction<? super I, ? super K, ? extends J> valueMapper

subAgg

protected SUBAGG extends ParallelAggregator<J,E,O,SUBACC> subAgg

Constructor Details

AggInputSplit

public AggInputSplit(SUBAGG subAgg,
 Function<? super I, ? extends Set<? extends K>> keyMapper,
 BiFunction<? super I, ? super K, ? extends J> valueMapper)

Create an instance with an empty set of fixedKeys and with addition of new keys allowed

AggInputSplit

public AggInputSplit(SUBAGG subAgg,
 Set<K> fixedKeys,
 boolean considerNewKeys,
 Function<? super I, ? extends Set<? extends K>> keyMapper,
 BiFunction<? super I, ? super K, ? extends J> valueMapper)

Method Details

createAccumulator

public AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC> createAccumulator()

Specified by:

createAccumulator in interface Aggregator<I,E,K>

Specified by:

createAccumulator in interface ParallelAggregator<I,E,K,J>

combine

public AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC> combine(AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC> a,
 AggInputSplit.AccInputSplit<I,E,K,J,O,SUBACC> b)

Description copied from interface: ParallelAggregator

Combine accumulators. This method is allowed to mutate any of if its arguments, hence accumulators should be considered exhausted after combination.

Specified by:

combine in interface ParallelAggregator<I,E,K,J>

Parameters:

a - First participant of combination

b - Second participant of combination

Returns:

Combined accumulator

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object