GvmListKeyer (HM Gears 0.10.7 API)

java.lang.Object
- org.hortonmachine.gears.utils.clustering.GvmSimpleKeyer<List<K>>
- - org.hortonmachine.gears.utils.clustering.GvmListKeyer<K>

Type Parameters:

K - type of key

All Implemented Interfaces:

GvmKeyer<List<K>>
```
public class GvmListKeyer<K>
extends GvmSimpleKeyer<List<K>>
```
Allows multiple keys to be associated with clusters in the form of a lists which may be concatenated when clusters merge.

Author:

Tom Gibara

- Constructor Summary
  
  Constructors
  Constructor Description
  
  GvmListKeyer()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  protected List<K> combineKeys(List<K> list1, List<K> list2)
  Combines two keys.
  - Methods inherited from class org.hortonmachine.gears.utils.clustering.GvmSimpleKeyer
    addKey, mergeKeys
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - GvmListKeyer
```
public GvmListKeyer()
```
- Method Detail
  - combineKeys
```
protected List<K> combineKeys(List<K> list1,
                              List<K> list2)
```
    Description copied from class: GvmSimpleKeyer
    
    Combines two keys. Combining two keys may totally discard information from one, both or none of the supplied keys.
    
    Specified by:
    
    combineKeys in class GvmSimpleKeyer<List<K>>
    
    Parameters:
    
    list1 - a key, not null
    
    list2 - a key, not null
    
    Returns:
    
    a combined key