Package es.uam.eps.ir.relison.index.fast

Class FastUnweightedAutoRelation<W>

java.lang.Object

es.uam.eps.ir.relison.index.fast.FastUnweightedRelation<W>

es.uam.eps.ir.relison.index.fast.FastUnweightedAutoRelation<W>

Type Parameters:

W - Type of the weights.

All Implemented Interfaces:

AutoRelation<W>, Relation<W>

public class FastUnweightedAutoRelation<W>
extends FastUnweightedRelation<W>
implements AutoRelation<W>

Fast implementation for an unweighted relation of objects with themselves.

Field Summary

Fields inherited from class es.uam.eps.ir.relison.index.fast.FastUnweightedRelation

firstIdxList, secondIdxList

Constructor Summary

Constructors

Constructor	Description
FastUnweightedAutoRelation()	Constructor.
FastUnweightedAutoRelation(java.util.List<java.util.List<java.lang.Integer>> weightList)	Constructor.

Method Summary

Modifier and Type	Method	Description
java.util.stream.IntStream	firstsWithSeconds()	Obtains the elements in first set with relations to the ones in the second.
java.util.stream.IntStream	getIsolated()	Obtains the elements in an autorelation which are related to none.
boolean	remove(int idx)	Removes an element.
java.util.stream.IntStream	secondsWithFirsts()	Obtains the elements in second set with relations to the ones in the first.

Methods inherited from class es.uam.eps.ir.relison.index.fast.FastUnweightedRelation

addFirstItem, addRelation, containsPair, getAllFirst, getIdsFirst, getIdsSecond, getIsolatedFirsts, getIsolatedSeconds, getValue, hasFirsts, hasSeconds, numFirst, numFirst, numSecond, removePair, updatePair

Methods inherited from class java.lang.Object

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

Methods inherited from interface es.uam.eps.ir.relison.index.AutoRelation

addSecondItem, getAllSecond, isIsolated, numSecond, numSecond

Methods inherited from interface es.uam.eps.ir.relison.index.Relation

addFirstItem, addRelation, containsPair, getAllFirst, getIdsFirst, getIdsSecond, getIsolatedFirsts, getIsolatedSeconds, getValue, hasFirsts, hasSeconds, numFirst, numFirst, removePair, updatePair, updatePair

Constructor Details

FastUnweightedAutoRelation

public FastUnweightedAutoRelation()

Constructor. Builds an empty autorelation.

FastUnweightedAutoRelation

public FastUnweightedAutoRelation(java.util.List<java.util.List<java.lang.Integer>> weightList)

Constructor. Builds an autorelation from previous information.

Parameters:

weightList - List of relations and their weights.

Method Details

getIsolated

public java.util.stream.IntStream getIsolated()

Description copied from interface: AutoRelation

Obtains the elements in an autorelation which are related to none.

Specified by:

getIsolated in interface AutoRelation<W>

Returns:

an int stream containing the indexes of the items which are related to none.

firstsWithSeconds

public java.util.stream.IntStream firstsWithSeconds()

Description copied from interface: Relation

Obtains the elements in first set with relations to the ones in the second.

Specified by:

firstsWithSeconds in interface Relation<W>

Overrides:

firstsWithSeconds in class FastUnweightedRelation<W>

Returns:

the elements in first set with relations to the ones in the second.

secondsWithFirsts

public java.util.stream.IntStream secondsWithFirsts()

Description copied from interface: Relation

Obtains the elements in second set with relations to the ones in the first.

Specified by:

secondsWithFirsts in interface Relation<W>

Overrides:

secondsWithFirsts in class FastUnweightedRelation<W>

Returns:

the elements in second set with relations to the ones in the first.

remove

public boolean remove(int idx)

Description copied from interface: AutoRelation

Removes an element. The identifiers of all remaining elements will be reduced by 1.

Specified by:

remove in interface AutoRelation<W>

Parameters:

idx - The identifier of the element.

Returns:

true if everything went OK, false otherwise.