de.lmu.ifi.dbs.elki.database.query.distance
Class AbstractDistanceQuery<O,D extends Distance<D>>

java.lang.Object
  de.lmu.ifi.dbs.elki.database.query.AbstractDataBasedQuery<O>
      de.lmu.ifi.dbs.elki.database.query.distance.AbstractDistanceQuery<O,D>

All Implemented Interfaces:

DatabaseQuery, DistanceQuery<O,D>

Direct Known Subclasses:

AbstractDatabaseDistanceQuery, PrimitiveDistanceQuery

public abstract class AbstractDistanceQuery<O,D extends Distance<D>>
extends AbstractDataBasedQuery<O>
implements DistanceQuery<O,D>

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

Field Summary

Fields inherited from class de.lmu.ifi.dbs.elki.database.query.AbstractDataBasedQuery

relation

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

Constructor Summary

AbstractDistanceQuery(Relation<? extends O> relation)
Constructor.

Method Summary

abstract D	distance(DBID id1, DBID id2) Returns the distance between the two objects specified by their object ids.
abstract D	distance(DBID id1, O o2) Returns the distance between the two objects specified by their object ids.
abstract D	distance(O o1, DBID id2) Returns the distance between the two objects specified by their object ids.
abstract D	distance(O o1, O o2) Returns the distance between the two objects specified by their object ids.
D	getDistanceFactory() Method to get the distance functions factory.
D	infiniteDistance() Provides an infinite distance.
D	nullDistance() Provides a null distance.
D	undefinedDistance() Provides an undefined distance.

Methods inherited from class de.lmu.ifi.dbs.elki.database.query.AbstractDataBasedQuery

getRelation

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.lmu.ifi.dbs.elki.database.query.distance.DistanceQuery

getDistanceFunction, getRelation

Constructor Detail

AbstractDistanceQuery

public AbstractDistanceQuery(Relation<? extends O> relation)

Constructor.

Parameters:

relation - Relation to use.

Method Detail

distance

public abstract D distance(DBID id1,
                           DBID id2)

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

Specified by:

distance in interface DistanceQuery<O,D extends Distance<D>>

Parameters:

id1 - first object id

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

distance

public abstract D distance(O o1,
                           DBID id2)

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

Specified by:

distance in interface DistanceQuery<O,D extends Distance<D>>

Parameters:

o1 - first object

id2 - second object id

Returns:

the distance between the two objects specified by their object ids

distance

public abstract D distance(DBID id1,
                           O o2)

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

Specified by:

distance in interface DistanceQuery<O,D extends Distance<D>>

Parameters:

id1 - first object id

o2 - second object

Returns:

the distance between the two objects specified by their object ids

distance

public abstract D distance(O o1,
                           O o2)

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

Specified by:

distance in interface DistanceQuery<O,D extends Distance<D>>

Parameters:

o1 - first object

o2 - second object

Returns:

the distance between the two objects specified by their object ids

getDistanceFactory

public D getDistanceFactory()

Description copied from interface: DistanceQuery

Method to get the distance functions factory.

Specified by:

getDistanceFactory in interface DistanceQuery<O,D extends Distance<D>>

Returns:

Factory for distance objects

infiniteDistance

public D infiniteDistance()

Provides an infinite distance.

Specified by:

infiniteDistance in interface DistanceQuery<O,D extends Distance<D>>

Returns:

an infinite distance

nullDistance

public D nullDistance()

Provides a null distance.

Specified by:

nullDistance in interface DistanceQuery<O,D extends Distance<D>>

Returns:

a null distance

undefinedDistance

public D undefinedDistance()

Provides an undefined distance.

Specified by:

undefinedDistance in interface DistanceQuery<O,D extends Distance<D>>

Returns:

an undefined distance