Package elki.index.tree.spatial.rstarvariants.strategies.insert

Class LeastEnlargementInsertionStrategy

java.lang.Object

elki.index.tree.spatial.rstarvariants.strategies.insert.LeastEnlargementInsertionStrategy

All Implemented Interfaces:

InsertionStrategy

@Reference(authors="A. Guttman",
           title="R-Trees: A Dynamic Index Structure For Spatial Searching",
           booktitle="Proc. 1984 ACM SIGMOD Int. Conf. on Management of Data",
           url="https://doi.org/10.1145/971697.602266",
           bibkey="doi:10.1145/971697.602266")
public class LeastEnlargementInsertionStrategy
extends java.lang.Object
implements InsertionStrategy

The default R-Tree insertion strategy: find rectangle with least volume enlargement.

Reference:

A. Guttman
R-Trees: A Dynamic Index Structure For Spatial Searching
Proc. 1984 ACM SIGMOD Int. Conf. Management of Data

Since:

0.5.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LeastEnlargementInsertionStrategy.Par	Parameterization class.

Field Summary

Fields

Modifier and Type	Field	Description
static LeastEnlargementInsertionStrategy	STATIC	Static instance.

Constructor Summary

Constructors

Constructor	Description
LeastEnlargementInsertionStrategy()	Constructor.

Method Summary

Modifier and Type	Method	Description
<A> int	choose(A options, ArrayAdapter<? extends SpatialComparable,A> getter, SpatialComparable obj, int height, int depth)	Choose insertion rectangle.

Methods inherited from class java.lang.Object

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

Field Detail

STATIC

public static final LeastEnlargementInsertionStrategy STATIC

Static instance.

Constructor Detail

LeastEnlargementInsertionStrategy

public LeastEnlargementInsertionStrategy()

Constructor.

Method Detail

choose

public <A> int choose(A options,
                      ArrayAdapter<? extends SpatialComparable,A> getter,
                      SpatialComparable obj,
                      int height,
                      int depth)

Description copied from interface: InsertionStrategy

Choose insertion rectangle.

Specified by:

choose in interface InsertionStrategy

Parameters:

options - Options to choose from

getter - Array adapter for options

obj - Insertion object

height - Tree height

depth - Insertion depth (depth == height - 1 indicates leaf level)

Returns:

Subtree index in array.