AbstractCoverTree.Factory (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

java.lang.Object
- elki.index.tree.metrical.covertree.AbstractCoverTree.Factory<O>

Type Parameters:

O - Object type

All Implemented Interfaces:

IndexFactory<O>

Direct Known Subclasses:

CoverTree.Factory, SimplifiedCoverTree.Factory

Enclosing class:

AbstractCoverTree<O>
```
public abstract static class AbstractCoverTree.Factory<O>
extends java.lang.Object
implements IndexFactory<O>
```
Index factory.

Author:

Erich Schubert

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class AbstractCoverTree.Factory.Par<O>
Parameterization class.

Field Summary

Fields
Modifier and Type	Field	Description
`protected Distance<? super O>`	`distance`	Holds the instance of the trees distance function.
`protected double`	`expansion`	Constant expansion rate. 2 would be the intuitive value, but the original version used 1.3, so we copy this.
`protected int`	`truncate`	Truncate tree at this height.

Constructor Summary

Constructors
Constructor Description

Factory(Distance<? super O> distance, double expansion, int truncate)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`TypeInformation`	`getInputTypeRestriction()`	Get the input type restriction used for negotiating the data query.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface elki.index.IndexFactory
instantiate

- Field Detail
  - distance
```
protected Distance<? super O> distance
```
    Holds the instance of the trees distance function.
  - expansion
```
protected double expansion
```
    Constant expansion rate. 2 would be the intuitive value, but the original version used 1.3, so we copy this. This means that in every level, the cover radius shrinks by 1.3.
  - truncate
```
protected int truncate
```
    Truncate tree at this height.
- Constructor Detail
  - Factory
```
public Factory(Distance<? super O> distance,
               double expansion,
               int truncate)
```
    Constructor.
    
    Parameters:
    
    distance - Distance function
    
    expansion - Expansion rate
    
    truncate - Truncate branches with less than this number of instances
- Method Detail
  - getInputTypeRestriction
```
public TypeInformation getInputTypeRestriction()
```
    Description copied from interface: IndexFactory
    
    Get the input type restriction used for negotiating the data query.
    
    Specified by:
    
    getInputTypeRestriction in interface IndexFactory<O>
    
    Returns:
    
    Type restriction