pu.RedLib

Class CollectionUnion<T>

java.lang.Object

pu.RedLib.CollectionUnion<T>

All Implemented Interfaces:

Reduction<java.util.Collection<T>>

public class CollectionUnion<T>
extends java.lang.Object
implements Reduction<java.util.Collection<T>>

Creates the union of the first Collection<T> and the second Collection<T> which are sent as arguments. The reducer iterates through every element of the second Collection<T>, and tries adding them to the first Collection<T>. An attempt is successful if and only if the corresponding element is not part of the first collection already!

Since:

15/10/2014

Author:

Mostafa Mehrabi

Field Summary

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
CollectionUnion()

Method Summary

Modifier and Type	Method and Description
java.util.Collection<T>	reduce(java.util.Collection<T> first, java.util.Collection<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

Constructor Detail

CollectionUnion

public CollectionUnion()

Method Detail

reduce

public java.util.Collection<T> reduce(java.util.Collection<T> first,
                                      java.util.Collection<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.Collection<T>>

Parameters:

first - The first element in the reduction.

second - The second element in the reduction.

Returns:

The result of reducing first with second.