de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.util
Class TopologicalSplitter.Split<E extends SpatialEntry>

java.lang.Object
  de.lmu.ifi.dbs.elki.index.tree.spatial.rstarvariants.util.TopologicalSplitter.Split<E>

Type Parameters:

E - Actual entry type

Enclosing class:

TopologicalSplitter

private class TopologicalSplitter.Split<E extends SpatialEntry>
extends Object

Internal data for an actual split.

Field Summary

(package private) int	bestSorting Indicates whether the sorting according to maximal or to minimal value has been used for choosing the split axis and split point.
(package private) List<E>	maxSorting The entries sorted according to their max values of their MBRs.
(package private) List<E>	minSorting The entries sorted according to their min values of their MBRs.
(package private) int	splitAxis The split axis.
(package private) int	splitPoint The index of the split point.

Constructor Summary

TopologicalSplitter.Split()
Constructor.

Method Summary

(package private) void	chooseSplitAxis(List<E> entries, int minEntries) Chooses a split axis.
(package private) void	chooseSplitPoint(int minEntries) Chooses a split axis.
List<E>	getBestSorting() Returns whether the sorting according to maximal or to minimal value has been used for choosing the split axis and split point.
int	getSplitPoint() Returns the split point.
private HyperBoundingBox	mbr(List<E> entries, int from, int to) Computes and returns the mbr of the specified nodes, only the nodes between from and to index are considered.

Methods inherited from class java.lang.Object

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

Field Detail

splitAxis

int splitAxis

The split axis.

splitPoint

int splitPoint

The index of the split point.

bestSorting

int bestSorting

Indicates whether the sorting according to maximal or to minimal value has been used for choosing the split axis and split point.

maxSorting

List<E extends SpatialEntry> maxSorting

The entries sorted according to their max values of their MBRs.

minSorting

List<E extends SpatialEntry> minSorting

The entries sorted according to their min values of their MBRs.

Constructor Detail

TopologicalSplitter.Split

public TopologicalSplitter.Split()

Constructor.

Method Detail

chooseSplitAxis

void chooseSplitAxis(List<E> entries,
                     int minEntries)

Chooses a split axis.

Parameters:

entries - the entries to be split

minEntries - number of minimum entries in the node to be split

chooseSplitPoint

void chooseSplitPoint(int minEntries)

Chooses a split axis.

Parameters:

minEntries - number of minimum entries in the node to be split

mbr

private HyperBoundingBox mbr(List<E> entries,
                             int from,
                             int to)

Computes and returns the mbr of the specified nodes, only the nodes between from and to index are considered.

Parameters:

entries - the array of nodes

from - the start index

to - the end index

Returns:

the mbr of the specified nodes

getSplitPoint

public int getSplitPoint()

Returns the split point.

Returns:

the split point

getBestSorting

public List<E> getBestSorting()

Returns whether the sorting according to maximal or to minimal value has been used for choosing the split axis and split point.

Returns:

The sorting to use