org.lenskit.eval.traintest.recommend

Class ItemSelector.ItemSelectScript

java.lang.Object

groovy.lang.GroovyObjectSupport

groovy.lang.Script

org.lenskit.eval.traintest.recommend.ItemSelector.ItemSelectScript

All Implemented Interfaces:

groovy.lang.GroovyObject

Enclosing class:

ItemSelector

public abstract static class ItemSelector.ItemSelectScript
extends groovy.lang.Script

Base class defining the environment in which item selectors are evaluated.

Constructor Summary

Constructors

Constructor and Description
ItemSelectScript()

Method Summary

Modifier and Type	Method and Description
LongSortedArraySet	getAllItems() Get the set of all items.
Recommender	getRecommender() Get the recommender object.
LongSet	getUnseenItems(TestUser user) Method that returns all items except the ones present in the user’s test or train sets.
TestUser	getUser() Get the user being tested.
LongSet	pickRandom(java.util.Set<java.lang.Long> items, int n) Pick a random subset of a set of items.
LongSet	randomUnseen(TestUser user, int n)

Methods inherited from class groovy.lang.Script

evaluate, evaluate, getBinding, getProperty, invokeMethod, print, printf, printf, println, println, run, run, setBinding, setProperty

Methods inherited from class groovy.lang.GroovyObjectSupport

getMetaClass, setMetaClass

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemSelectScript

public ItemSelectScript()

Method Detail

getRecommender

public Recommender getRecommender()

Get the recommender object.

Returns:

The recommender object.

getAllItems

public LongSortedArraySet getAllItems()

Get the set of all items.

Returns:

The set of all items.

getUser

public TestUser getUser()

Get the user being tested.

Returns:

The user being tested, with their training and test data.

pickRandom

public LongSet pickRandom(java.util.Set<java.lang.Long> items,
                          int n)

Pick a random subset of a set of items.

Parameters:

items - The set of items to pick from.

n - the number of items to select.

Returns:

A random subset of items of size at most n.

getUnseenItems

public LongSet getUnseenItems(TestUser user)

Method that returns all items except the ones present in the user’s test or train sets.

randomUnseen

public LongSet randomUnseen(TestUser user,
                            int n)