de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy
Interface Hierarchy<O>

Type Parameters:

O - Object type

All Known Subinterfaces:

ModifiableHierarchy<O>

All Known Implementing Classes:

HierarchyHashmapList, HierarchyReferenceLists, ResultHierarchy

public interface Hierarchy<O>

This interface represents an (external) hierarchy of objects. It can contain arbitrary objects, BUT the hierarchy has to be accessed using the hierarchy object, i.e. hierarchy.getChildren(object);. See Hierarchical for an interface for objects with an internal hierarchy (where you can use object.getChildren();)

Method Summary

List<O>	getChildren(O self) Get children list.
List<O>	getParents(O self) Get parents list.
IterableIterator<O>	iterAncestors(O self) Iterate ancestors (recursive parents)
IterableIterator<O>	iterDescendants(O self) Iterate descendants (recursive children)
int	numChildren(O self) Get number of children
int	numParents(O self) Get number of (direct) parents

Method Detail

numChildren

int numChildren(O self)

Get number of children

Parameters:

self - object to get number of children for

Returns:

number of children

getChildren

List<O> getChildren(O self)

Get children list. Resulting list MAY be modified. Result MAY be null, if the model is not hierarchical.

Parameters:

self - object to get children for

Returns:

list of children

iterDescendants

IterableIterator<O> iterDescendants(O self)

Iterate descendants (recursive children)

Parameters:

self - object to get descendants for

Returns:

iterator for descendants

numParents

int numParents(O self)

Get number of (direct) parents

Parameters:

self - reference object

Returns:

number of parents

getParents

List<O> getParents(O self)

Get parents list. Resulting list MAY be modified. Result MAY be null, if the model is not hierarchical.

Parameters:

self - object to get parents for

Returns:

list of parents

iterAncestors

IterableIterator<O> iterAncestors(O self)

Iterate ancestors (recursive parents)

Parameters:

self - object to get ancestors for

Returns:

iterator for ancestors