org.grouplens.lenskit.basic

Class PrecomputedItemScorer.Builder

java.lang.Object

org.grouplens.lenskit.basic.PrecomputedItemScorer.Builder

Enclosing class:

PrecomputedItemScorer

public static class PrecomputedItemScorer.Builder
extends Object

Builder for mock item scorers.

Constructor Summary

Constructors

Constructor and Description
Builder()

Method Summary

Modifier and Type	Method and Description
PrecomputedItemScorer.Builder	addScore(long user, long item, double score) Add a score.
PrecomputedItemScorer.Builder	addUser(long user, SparseVector usv) Add an user's entire score vector to the mock scorer.
PrecomputedItemScorer	build() Construct the mock item scorer.

Methods inherited from class java.lang.Object

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

Constructor Detail

Builder

public Builder()

Method Detail

addUser

public PrecomputedItemScorer.Builder addUser(long user,
                                             SparseVector usv)

Add an user's entire score vector to the mock scorer.

Parameters:

user - The user.

usv - The vector of scores to use. This will replace any previously-added scores.

Returns:

The builder (for chaining).

addScore

public PrecomputedItemScorer.Builder addScore(long user,
                                              long item,
                                              double score)

Add a score. When the item is scored for the user, the mock scorer will return this score.

Parameters:

user - The user ID.

item - The item ID.

score - The score to return.

Returns:

The builder (for chaining).

build

public PrecomputedItemScorer build()

Construct the mock item scorer. This will empty the builder.

Returns:

A mock item scorer that will return the configured scores.