WrappedKNNDBIDByLookup (ELKI: Environment for DeveLoping KDD-Applications Supported by Index-Structures)

java.lang.Object
- elki.database.query.knn.WrappedKNNDBIDByLookup<O>

Type Parameters:

O - relation object type

All Implemented Interfaces:

KNNSearcher<DBIDRef>

Direct Known Subclasses:

WrappedKNNDBIDByLookup.Linear
```
public class WrappedKNNDBIDByLookup<O>
extends java.lang.Object
implements KNNSearcher<DBIDRef>
```
Find nearest neighbors by querying with the original object.

Since:

0.8.0

Author:

Erich Schubert

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class WrappedKNNDBIDByLookup.Linear<O>
Linear scan searcher.

Field Summary

Fields
Modifier and Type Field Description

private KNNSearcher<O> inner
Inner kNN searcher.

private Relation<? extends O> relation
Data relation.

Constructor Summary

Constructors
Modifier Constructor Description

private WrappedKNNDBIDByLookup(Relation<? extends O> relation, KNNSearcher<O> inner)
Constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`KNNList`	`getKNN(DBIDRef id, int k)`	Get the k nearest neighbors for a particular object.
`static <O> KNNSearcher<DBIDRef>`	`wrap(Relation<? extends O> relation, KNNSearcher<O> inner)`	Wrap a query, if not `null`.

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

- Field Detail
  - relation
```
private Relation<? extends O> relation
```
    Data relation.
  - inner
```
private KNNSearcher<O> inner
```
    Inner kNN searcher.
- Constructor Detail
  - WrappedKNNDBIDByLookup
```
private WrappedKNNDBIDByLookup(Relation<? extends O> relation,
                               KNNSearcher<O> inner)
```
    Constructor.
    
    Parameters:
    
    relation - data relation
    
    inner - inner kNN searcher
- Method Detail
  - getKNN
```
public KNNList getKNN(DBIDRef id,
                      int k)
```
    Description copied from interface: KNNSearcher
    
    Get the k nearest neighbors for a particular object.
    
    Specified by:
    
    getKNN in interface KNNSearcher<O>
    
    Parameters:
    
    id - query object
    
    k - Number of neighbors requested
    
    Returns:
    
    neighbors
  - wrap
```
public static <O> KNNSearcher<DBIDRef> wrap(Relation<? extends O> relation,
                                            KNNSearcher<O> inner)
```
    Wrap a query, if not null.
    
    Type Parameters:
    
    O - inner data type
    
    Parameters:
    
    relation - Relation to get object from
    
    inner - inner query
    
    Returns:
    
    wrapped query, or null if inner was null