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

java.lang.Object
- elki.datasource.filter.AbstractStreamFilter
- - elki.datasource.filter.selection.FirstNStreamFilter

All Implemented Interfaces:

BundleStreamSource, ObjectFilter, StreamFilter
```
public class FirstNStreamFilter
extends AbstractStreamFilter
```
Keep only the first N elements of the data source.

Since:

0.7.5

Author:

Erich Schubert

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class FirstNStreamFilter.Par
Parameterization class
- Nested classes/interfaces inherited from interface elki.datasource.bundle.BundleStreamSource
  BundleStreamSource.Event

Field Summary

Fields
Modifier and Type Field Description

protected int n
Remaining entries to keep
- Fields inherited from class elki.datasource.filter.AbstractStreamFilter
  source

Constructor Summary

Constructors
Constructor Description

FirstNStreamFilter(int n)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`data(int rnum)`	Access a particular object and representation.
`BundleMeta`	`getMeta()`	Get the current meta data.
`BundleStreamSource.Event`	`nextEvent()`	Get the next event

Methods inherited from class elki.datasource.filter.AbstractStreamFilter
asMultipleObjectsBundle, assignDBID, filter, hasDBIDs, init, toString

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

- Field Detail
  - n
```
protected int n
```
    Remaining entries to keep
- Constructor Detail
  - FirstNStreamFilter
```
public FirstNStreamFilter(int n)
```
    Constructor.
    
    Parameters:
    
    n - number of entries to keep
- Method Detail
  - getMeta
```
public BundleMeta getMeta()
```
    Description copied from interface: BundleStreamSource
    
    Get the current meta data.
    
    Returns:
    
    Metadata
  - data
```
public java.lang.Object data(int rnum)
```
    Description copied from interface: BundleStreamSource
    
    Access a particular object and representation.
    
    Parameters:
    
    rnum - Representation number
    
    Returns:
    
    Contained data
  - nextEvent
```
public BundleStreamSource.Event nextEvent()
```
    Description copied from interface: BundleStreamSource
    
    Get the next event
    
    Returns:
    
    Event type