de.lmu.ifi.dbs.elki.distance.distancefunction

Class ProxyDistanceFunction<O,D extends Distance<D>>

java.lang.Object

de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractDBIDDistanceFunction<D>

de.lmu.ifi.dbs.elki.distance.distancefunction.ProxyDistanceFunction<O,D>

Type Parameters:

O - object type

D - distance type

All Implemented Interfaces:

DBIDDistanceFunction<D>, DistanceFunction<DBID,D>, InspectionUtilFrequentlyScanned, Parameterizable

public class ProxyDistanceFunction<O,D extends Distance<D>>
extends AbstractDBIDDistanceFunction<D>

Distance function to proxy computations to another distance (that probably was run before).

Field Summary

Fields

Modifier and Type	Field and Description
(package private) DistanceQuery<O,D>	inner Distance query

Constructor Summary

Constructors

Constructor and Description
ProxyDistanceFunction(DistanceQuery<O,D> inner) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
D	distance(DBIDRef o1, DBIDRef o2) Returns the distance between the two objects specified by their object ids.
boolean	equals(Object obj)
D	getDistanceFactory() Method to get the distance functions factory.
DistanceQuery<O,D>	getDistanceQuery() Get the inner query
int	hashCode()
static <O,D extends Distance<D>> ProxyDistanceFunction<O,D>	proxy(DistanceQuery<O,D> inner) Static method version.
void	setDistanceQuery(DistanceQuery<O,D> inner)
static <V,T extends V,D extends Distance<D>> DistanceFunction<? super V,D>	unwrapDistance(DistanceFunction<V,D> dfun) Helper function, to resolve any wrapped Proxy Distances

Methods inherited from class de.lmu.ifi.dbs.elki.distance.distancefunction.AbstractDBIDDistanceFunction

getInputTypeRestriction, instantiate, isMetric, isSymmetric

Methods inherited from class java.lang.Object

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

Field Detail

inner

DistanceQuery<O,D extends Distance<D>> inner

Distance query

Constructor Detail

ProxyDistanceFunction

public ProxyDistanceFunction(DistanceQuery<O,D> inner)

Constructor

Parameters:

inner - Inner distance

Method Detail

proxy

public static <O,D extends Distance<D>> ProxyDistanceFunction<O,D> proxy(DistanceQuery<O,D> inner)

Static method version.

Type Parameters:

O - Object type

D - Distance type

Parameters:

inner - Inner distance query

Returns:

Proxy object

distance

public D distance(DBIDRef o1,
         DBIDRef o2)

Description copied from interface: DBIDDistanceFunction

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

Specified by:

distance in interface DBIDDistanceFunction<D extends Distance<D>>

Specified by:

distance in class AbstractDBIDDistanceFunction<D extends Distance<D>>

Parameters:

o1 - first object id

o2 - second object id

Returns:

the distance between the two objects specified by their object ids

getDistanceFactory

public D getDistanceFactory()

Description copied from interface: DistanceFunction

Method to get the distance functions factory.

Specified by:

getDistanceFactory in interface DistanceFunction<DBID,D extends Distance<D>>

Specified by:

getDistanceFactory in class AbstractDBIDDistanceFunction<D extends Distance<D>>

Returns:

Factory for distance objects

getDistanceQuery

public DistanceQuery<O,D> getDistanceQuery()

Get the inner query

Returns:

query

setDistanceQuery

public void setDistanceQuery(DistanceQuery<O,D> inner)

Parameters:

inner - the inner distance query to set

unwrapDistance

public static <V,T extends V,D extends Distance<D>> DistanceFunction<? super V,D> unwrapDistance(DistanceFunction<V,D> dfun)

Helper function, to resolve any wrapped Proxy Distances

Type Parameters:

V - Object type

D - Distance type

Parameters:

dfun - Distance function to unwrap.

Returns:

unwrapped distance function

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object