LexicalClusteringStrategy (MG4J (big) 5.4.4)

All Superinterfaces:

ClusteringStrategy, Serializable

All Known Implementing Classes:

ChainedLexicalClusteringStrategy, ContiguousLexicalStrategy
```
public interface LexicalClusteringStrategy
extends ClusteringStrategy
```
A way to associate a term with a local index out of a given set.
A LexicalCluster needs a way to retrieve, given a term, the corresponding local index.

Author:

Alessandro Arrabito, Sebastiano Vigna

See Also:

LexicalPartitioningStrategy

Method Summary

Modifier and Type	Method	Description
`long`	`globalNumber(int localIndex, long localNumber)`	Returns the global term number given a local index and a local term number (optional operation).
`int`	`localIndex(CharSequence term)`	Returns the index to which a given term is be mapped by this strategy.

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

- Method Detail
  - localIndex
```
int localIndex(CharSequence term)
```
    Returns the index to which a given term is be mapped by this strategy.
    
    Parameters:
    
    term - a term.
    
    Returns:
    
    the corresponding local index, or -1 if no index contains the term.
  - globalNumber
```
long globalNumber(int localIndex,
                  long localNumber)
```
    Returns the global term number given a local index and a local term number (optional operation).
    This operation is not, in general, necessary for a LexicalCluster to work, as no action on a local index returns local numbers. It is defined here mainly for completeness and for debugging purposes (in case it is implemented).
    
    Parameters:
    
    localIndex - the local index.
    
    localNumber - the local term number.
    
    Returns:
    
    the global term number.