Package org.eclipse.collections.impl.block.procedure

Class NonMutatingAggregationProcedure<T,K,V>

java.lang.Object

org.eclipse.collections.impl.block.procedure.NonMutatingAggregationProcedure<T,K,V>

All Implemented Interfaces:

Serializable, Consumer<T>, Procedure<T>

public final class NonMutatingAggregationProcedure<T,K,V>
extends Object
implements Procedure<T>

This procedure is used to apply an aggregate function like sum on a grouped set of data. The values in the grouping must be immutable using this procedure. An example would be using an Integer which is immutable vs. an AtomicInteger which is not.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
NonMutatingAggregationProcedure(MutableMapIterable<K,V> map, Function<? super T,? extends K> groupBy, Function0<? extends V> zeroValueFactory, Function2<? super V,? super T,? extends V> nonMutatingAggregator)

Method Summary

Modifier and Type	Method	Description
void	value(T each)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Consumer

andThen

Methods inherited from interface org.eclipse.collections.api.block.procedure.Procedure

accept

Constructor Detail

NonMutatingAggregationProcedure

public NonMutatingAggregationProcedure(MutableMapIterable<K,V> map,
                                       Function<? super T,? extends K> groupBy,
                                       Function0<? extends V> zeroValueFactory,
                                       Function2<? super V,? super T,? extends V> nonMutatingAggregator)

Method Detail

value

public void value(T each)

Specified by:

value in interface Procedure<T>