org.conqat.lib.commons.datamining

Class RecommenderRatingDatabase<T>

java.lang.Object

org.conqat.lib.commons.datamining.RecommenderRatingDatabase<T>

All Implemented Interfaces:

java.io.Serializable

public class RecommenderRatingDatabase<T>
extends java.lang.Object
implements java.io.Serializable

Binary rating database. A rating is either 'like' or 'unrated'.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RecommenderRatingDatabase()

Method Summary

Modifier and Type	Method and Description
void	add(IRecommenderUser user, java.util.Set<T> likedItems) Adds the given users to this rating database.
static <T> RecommenderRatingDatabase<T>	fromShoppingBaskets(java.util.Set<java.util.Set<T>> shoppingBaskets) Constructs a new RecommenderRatingDatabase from the given shopping baskets
java.util.Set<T>	getLikedItems(IRecommenderUser user) Returns the items liked by the given user.
UnmodifiableSet<IRecommenderUser>	getUsers() Returns all users contained in this database.
void	remove(IRecommenderUser user) Removes the user completely
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RecommenderRatingDatabase

public RecommenderRatingDatabase()

Method Detail

getUsers

public UnmodifiableSet<IRecommenderUser> getUsers()

Returns all users contained in this database.

add

public void add(IRecommenderUser user,
                java.util.Set<T> likedItems)

Adds the given users to this rating database.

remove

public void remove(IRecommenderUser user)

Removes the user completely

getLikedItems

public java.util.Set<T> getLikedItems(IRecommenderUser user)

Returns the items liked by the given user. If no entry for this user is found an IllegalArgumentException is thrown.

fromShoppingBaskets

public static <T> RecommenderRatingDatabase<T> fromShoppingBaskets(java.util.Set<java.util.Set<T>> shoppingBaskets)

Constructs a new RecommenderRatingDatabase from the given shopping baskets

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object