es.uam.eps.ir.ranksys.novdiv.distance

Class FeatureItemDistanceModel<I,F,V>

java.lang.Object

es.uam.eps.ir.ranksys.novdiv.distance.FeatureItemDistanceModel<I,F,V>

Type Parameters:

I - type of the items

F - type of the features

V - type of the information between item-feature pairs

All Implemented Interfaces:

ItemDistanceModel<I>

Direct Known Subclasses:

VectorFeatureItemDistanceModel

public abstract class FeatureItemDistanceModel<I,F,V>
extends Object
implements ItemDistanceModel<I>

Feature-based item distance model.

Author:

Saúl Vargas (saul.vargas@uam.es)

Constructor Summary

Constructors

Constructor and Description
FeatureItemDistanceModel(FeatureData<I,F,V> featureData) Constructor.

Method Summary

Modifier and Type	Method and Description
ToDoubleFunction<I>	dist(I i) Returns a function that return the distance to the input item.
protected abstract ToDoubleFunction<Stream<org.jooq.lambda.tuple.Tuple2<F,V>>>	dist(Stream<org.jooq.lambda.tuple.Tuple2<F,V>> features1) Returns a function that returns the feature-based similarity to the features of an item.

Methods inherited from class java.lang.Object

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

Methods inherited from interface es.uam.eps.ir.ranksys.novdiv.distance.ItemDistanceModel

dist

Constructor Detail

FeatureItemDistanceModel

public FeatureItemDistanceModel(FeatureData<I,F,V> featureData)

Constructor.

Parameters:

featureData - feature data

Method Detail

dist

public ToDoubleFunction<I> dist(I i)

Returns a function that return the distance to the input item.

Specified by:

dist in interface ItemDistanceModel<I>

Parameters:

i - item

Returns:

function that return the distance to the input item

dist

protected abstract ToDoubleFunction<Stream<org.jooq.lambda.tuple.Tuple2<F,V>>> dist(Stream<org.jooq.lambda.tuple.Tuple2<F,V>> features1)

Returns a function that returns the feature-based similarity to the features of an item.

Parameters:

features1 - stream of features of an item

Returns:

function that returns the feature-based similarity to the features of an item