de.lmu.ifi.dbs.elki.utilities.datastructures.unionfind

Interface UnionFind

All Known Implementing Classes:

WeightedQuickUnionRangeDBIDs, WeightedQuickUnionStaticDBIDs

public interface UnionFind

Union-find implementations in ELKI, for DBID objects.

Since:

0.7.0

Author:

Erich Schubert

Method Summary

Methods

Modifier and Type	Method and Description
int	find(DBIDRef p) Find the component ID of an element.
DBIDs	getRoots() Collect all component root elements.
boolean	isConnected(DBIDRef p, DBIDRef q) Test if two components are connected.
int	union(DBIDRef p, DBIDRef q) Join the components of elements p and q.

Method Detail

union

int union(DBIDRef p,
        DBIDRef q)

Join the components of elements p and q.

Parameters:

p - First element

q - Second element

Returns:

Component id.

isConnected

boolean isConnected(DBIDRef p,
                  DBIDRef q)

Test if two components are connected.

Parameters:

p - First element

q - Second element

Returns:

true if they are in the same component.

getRoots

DBIDs getRoots()

Collect all component root elements.

Returns:

Root elements

find

int find(DBIDRef p)

Find the component ID of an element.

Parameters:

p - Element

Returns:

Component id