DocumentalClusteringStrategy (MG4J (big) 5.4.4)

All Superinterfaces:

ClusteringStrategy, Serializable

All Known Implementing Classes:

ContiguousDocumentalStrategy, IdentityDocumentalStrategy
```
public interface DocumentalClusteringStrategy
extends ClusteringStrategy
```
A way to associate (quite bidirectionally) local and global document pointers.
A DocumentalCluster needs a way to turn local document pointer into global pointers, but also global pointers into local pointers (for skipping).

Author:

Alessandro Arrabito, Sebastiano Vigna

See Also:

DocumentalPartitioningStrategy

Method Summary

Modifier and Type	Method	Description
`long`	`globalPointer(int localIndex, long localPointer)`	Returns the global document pointer given a local index and a local document pointer.
`long`	`localPointer(long globalPointer)`	Returns the local document pointer corresponding to a global document pointer.
`long`	`numberOfDocuments(int localIndex)`	Returns the number of documents that will be assigned to the given local index.

Methods inherited from interface it.unimi.di.big.mg4j.index.cluster.ClusteringStrategy
numberOfLocalIndices

- Method Detail
  - globalPointer
```
long globalPointer(int localIndex,
                   long localPointer)
```
    Returns the global document pointer given a local index and a local document pointer.
    
    Parameters:
    
    localIndex - the local index.
    
    localPointer - the local document pointer in localIndex.
    
    Returns:
    
    the global document pointer.
  - localPointer
```
long localPointer(long globalPointer)
```
    Returns the local document pointer corresponding to a global document pointer.
    
    Parameters:
    
    globalPointer - a global document pointer.
    
    Returns:
    
    the corresponding local document pointer.
  - numberOfDocuments
```
long numberOfDocuments(int localIndex)
```
    Returns the number of documents that will be assigned to the given local index.
    
    Parameters:
    
    localIndex - the local index.
    
    Returns:
    
    the number of documents that will be assigned to localIndex.