@ThreadSafe public class SnapshotNeighborFinder extends java.lang.Object implements NeighborFinder
A neighborhood finder that has a snapshot of the rating data for efficiency.
Constructor and Description |
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SnapshotNeighborFinder(UserSnapshot snap,
UserSimilarity sim,
RatingVectorPDAO rvd,
UserVectorNormalizer simNorm,
Threshold thresh) |
Modifier and Type | Method and Description |
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java.lang.Iterable<Neighbor> |
getCandidateNeighbors(long user,
LongSet items)
Get potential neighbors for a particular user.
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@Inject public SnapshotNeighborFinder(UserSnapshot snap, UserSimilarity sim, RatingVectorPDAO rvd, @SimilarityNormalizer UserVectorNormalizer simNorm, @UserSimilarityThreshold Threshold thresh)
public java.lang.Iterable<Neighbor> getCandidateNeighbors(long user, LongSet items)
NeighborFinder
Get potential neighbors for a particular user.
getCandidateNeighbors
in interface NeighborFinder
user
- The user ID whose neighbors are wanted.items
- The items that the client needs to be able to score or recommend.user
. This collection may include neighbors that are not useful for scoring any item in items
; the item set is just to help the neighbor finder guide its search if relevant.