es.uam.eps.ir.ranksys.nn.neighborhood

Class CachedNeighborhood

java.lang.Object

es.uam.eps.ir.ranksys.nn.neighborhood.CachedNeighborhood

All Implemented Interfaces:

Neighborhood

public class CachedNeighborhood
extends Object
implements Neighborhood

Cached neighborhood. Stores user neighborhoods.

Author:

Saúl Vargas (saul.vargas@uam.es)

Constructor Summary

Constructors

Constructor and Description
CachedNeighborhood(int n, Neighborhood neighborhood) Constructor that calculates and caches neighborhoods.
CachedNeighborhood(int n, Stream<Tuple2io<Stream<Tuple2id>>> neighborhoods) Constructor that caches a stream of previously calculated neighborhoods.

Method Summary

Modifier and Type	Method and Description
Stream<Tuple2id>	getNeighbors(int idx) Returns the neighborhood of a user/index.

Methods inherited from class java.lang.Object

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

Constructor Detail

CachedNeighborhood

public CachedNeighborhood(int n,
                          Neighborhood neighborhood)

Constructor that calculates and caches neighborhoods.

Parameters:

n - number of users/items

neighborhood - generic neighborhood to be cached

CachedNeighborhood

public CachedNeighborhood(int n,
                          Stream<Tuple2io<Stream<Tuple2id>>> neighborhoods)

Constructor that caches a stream of previously calculated neighborhoods.

Parameters:

n - number of users/items

neighborhoods - stream of already calculated neighborhoods

Method Detail

getNeighbors

public Stream<Tuple2id> getNeighbors(int idx)

Returns the neighborhood of a user/index.

Specified by:

getNeighbors in interface Neighborhood

Parameters:

idx - user/index whose neighborhood is calculated

Returns:

stream of user/item-similarity pairs.