pu.RedLib

Class MapIntersection<K,T>

java.lang.Object

pu.RedLib.MapIntersection<K,T>

All Implemented Interfaces:

Reduction<java.util.Map<K,T>>

public class MapIntersection<K,T>
extends java.lang.Object
implements Reduction<java.util.Map<K,T>>

Field Summary

Fields

Modifier and Type	Field and Description
protected Reduction<T>	reducer

Fields inherited from interface pu.RedLib.Reduction

ArrayCOMBINE, BooleanBITAND, BooleanBITOR, BooleanBITXOR, BooleanLOGAND, BooleanLOGOR, ByteBITAND, ByteBITOR, ByteBITXOR, ByteMAX, ByteMIN, ByteMINUS, ByteMULTI, ByteSUM, DoubleBITAND, DoubleBITOR, DoubleBITXOR, DoubleLOGAND, DoubleLOGOR, DoubleMAX, DoubleMIN, DoubleMINUS, DoubleMULTI, DoubleSUM, FloatMAX, FloatMIN, FloatMINUS, FloatMULTI, FloatSUM, IntegerBITAND, IntegerBITOR, IntegerBITXOR, IntegerLOGAND, IntegerLOGOR, IntegerMAX, IntegerMIN, IntegerMINUS, IntegerMULTI, IntegerSUM, LongBITAND, LongBITOR, LongBITXOR, LongLOGOR, LongMAX, LongMIN, LongMINUS, LongMULTI, LongSUM, ShortBITAND, ShortBITOR, ShortBITXOR, ShortMAX, ShortMIN, ShortMINUS, ShortMULTI, ShortSUM

Constructor Summary

Constructors

Constructor and Description
MapIntersection(Reduction<T> reducer)

Method Summary

Modifier and Type	Method and Description
java.util.Map<K,T>	reduce(java.util.Map<K,T> first, java.util.Map<K,T> second) Specifies a reduction as defined by 2 elements into 1.

Methods inherited from class java.lang.Object

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

Field Detail

reducer

protected Reduction<T> reducer

Constructor Detail

MapIntersection

public MapIntersection(Reduction<T> reducer)

Method Detail

reduce

public java.util.Map<K,T> reduce(java.util.Map<K,T> first,
                                 java.util.Map<K,T> second)

Description copied from interface: Reduction

Specifies a reduction as defined by 2 elements into 1. The reduction must obey the following 2 constraints:

• Associative: the order of evaluating the reduction makes no difference, and
• Commutative: the order of the thread-local values makes no difference.

Specified by:

reduce in interface Reduction<java.util.Map<K,T>>

Parameters:

first - The first element in the reduction.

second - The second element in the reduction.

Returns:

The result of reducing first with second.