de.lmu.ifi.dbs.elki.database.query.distance

Interface DistanceQuery<O>

Type Parameters:

O - Input data type

All Superinterfaces:

DatabaseQuery

All Known Subinterfaces:

DatabaseDistanceQuery<O>, DistanceSimilarityQuery<O>, IndexBasedDistanceFunction.Instance<T,I>, SpatialDistanceQuery<V>

All Known Implementing Classes:

AbstractDatabaseDistanceFunction.Instance, AbstractIndexBasedDistanceFunction.Instance, AbstractSimilarityAdapter.Instance, ArccosSimilarityAdapter.Instance, CLARA.CachedDistanceQuery, DBIDDistanceQuery, DBIDRangeDistanceQuery, LinearAdapterLinear.Instance, LnSimilarityAdapter.Instance, PrecomputedDistanceMatrix.PrecomputedDistanceQuery, PrimitiveDistanceQuery, PrimitiveDistanceSimilarityQuery, SharedNearestNeighborJaccardDistanceFunction.Instance, SpatialPrimitiveDistanceQuery, SpatialPrimitiveDistanceSimilarityQuery

public interface DistanceQuery<O>
extends DatabaseQuery

A distance query serves as adapter layer for database and primitive distances.

Since:

0.4.0

Author:

Erich Schubert

Field Summary

Fields inherited from interface de.lmu.ifi.dbs.elki.database.query.DatabaseQuery

HINT_BULK, HINT_EXACT, HINT_HEAVY_USE, HINT_NO_CACHE, HINT_OPTIMIZED_ONLY, HINT_SINGLE

Method Summary

Modifier and Type	Method and Description
double	distance(DBIDRef id1, DBIDRef id2) Returns the distance between the two objects specified by their object ids.
double	distance(DBIDRef id1, O o2) Returns the distance between the two objects specified by their object ids.
double	distance(O o1, DBIDRef id2) Returns the distance between the two objects specified by their object ids.
double	distance(O o1, O o2) Returns the distance between the two objects specified by their object ids.
DistanceFunction<? super O>	getDistanceFunction() Get the inner distance function.
Relation<? extends O>	getRelation() Access the underlying data query.

Method Detail

distance

double distance(DBIDRef id1,
                DBIDRef id2)

Returns the distance between the two objects specified by their object ids.

Parameters:

id1 - first object id

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

distance

double distance(O o1,
                DBIDRef id2)

Returns the distance between the two objects specified by their object ids.

Parameters:

o1 - first object

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

distance

double distance(DBIDRef id1,
                O o2)

Returns the distance between the two objects specified by their object ids.

Parameters:

id1 - first object id

o2 - second object

Returns:

the distance between the two objects specified by their object ids

distance

double distance(O o1,
                O o2)

Returns the distance between the two objects specified by their object ids.

Parameters:

o1 - first object

o2 - second object

Returns:

the distance between the two objects specified by their object ids

getDistanceFunction

DistanceFunction<? super O> getDistanceFunction()

Get the inner distance function.

Returns:

Distance function

getRelation

Relation<? extends O> getRelation()

Access the underlying data query.

Returns:

data query in use