org.grouplens.lenskit.basic

Class SimpleCachingItemScorer

java.lang.Object

org.grouplens.lenskit.basic.AbstractItemScorer

org.grouplens.lenskit.basic.SimpleCachingItemScorer

All Implemented Interfaces:

ItemScorer

public class SimpleCachingItemScorer
extends AbstractItemScorer

A simple cached item scorer that remembers the result for the last user id it scored.

Constructor Summary

Constructors

Constructor and Description
SimpleCachingItemScorer(ItemScorer sc)

Method Summary

Modifier and Type	Method and Description
SparseVector	getCache()
long	getId()
void	score(long user, MutableSparseVector scores) For each input, check with the cached user id.

Methods inherited from class org.grouplens.lenskit.basic.AbstractItemScorer

score, score

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleCachingItemScorer

@Inject
public SimpleCachingItemScorer(ItemScorer sc)

Method Detail

score

public void score(long user,
                  @Nonnull
                  MutableSparseVector scores)

For each input, check with the cached user id. If the requested items is a subset of the cached items, use the cache; otherwise score the new items and update the cached scores.

Parameters:

user - The user ID.

scores - The score vector.

getId

public long getId()

getCache

public SparseVector getCache()