es.uam.eps.ir.ranksys.novdiv.itemnovelty

Class ItemNovelty<U,I>

java.lang.Object

es.uam.eps.ir.ranksys.core.model.UserModel<U>

es.uam.eps.ir.ranksys.novdiv.itemnovelty.ItemNovelty<U,I>

Type Parameters:

U - type of the users

I - type of the items

Direct Known Subclasses:

FDItemNovelty, ISDCItemNovelty, PCItemNovelty, PDItemNovelty, TDItemNovelty

public abstract class ItemNovelty<U,I>
extends UserModel<U>

Item novelty model. S. Vargas. Novelty and diversity evaluation and enhancement in Recommender Systems. PhD Thesis. S. Vargas and P. Castells. Rank and relevance in novelty and diversity for Recommender Systems. RecSys 2011.

Author:

Saúl Vargas (saul.vargas@uam.es), Pablo Castells (pablo.castells@uam.es)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ItemNovelty.UserItemNoveltyModel<U,I> Item novelty model for a user.

Nested classes/interfaces inherited from class es.uam.eps.ir.ranksys.core.model.UserModel

UserModel.Model<U>

Constructor Summary

Constructors

Constructor and Description
ItemNovelty() Constructor in which no caching is done.
ItemNovelty(boolean caching, Stream<U> users) Constructor.
ItemNovelty(Stream<U> users) Constructor in which caching is done.

Method Summary

Modifier and Type	Method and Description
protected abstract ItemNovelty.UserItemNoveltyModel<U,I>	get(U u) Calculates the user model for user u.
ItemNovelty.UserItemNoveltyModel<U,I>	getModel(U u) Returns the user model for user u.

Methods inherited from class es.uam.eps.ir.ranksys.core.model.UserModel

initialize

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemNovelty

public ItemNovelty(boolean caching,
                   Stream<U> users)

Constructor.

Parameters:

caching - are the user item novelty models cached?

users - users whose item novelty models are cached

ItemNovelty

public ItemNovelty()

Constructor in which no caching is done.

ItemNovelty

public ItemNovelty(Stream<U> users)

Constructor in which caching is done.

Parameters:

users - users whose item novelty models are cached

Method Detail

get

protected abstract ItemNovelty.UserItemNoveltyModel<U,I> get(U u)

Description copied from class: UserModel

Calculates the user model for user u.

Specified by:

get in class UserModel<U>

Parameters:

u - the user

Returns:

a user model

getModel

public ItemNovelty.UserItemNoveltyModel<U,I> getModel(U u)

Description copied from class: UserModel

Returns the user model for user u.

Overrides:

getModel in class UserModel<U>

Parameters:

u - the user

Returns:

a user model