org.apache.lucene.util
Class MapOfSets<K,V>

java.lang.Object
  org.apache.lucene.util.MapOfSets<K,V>

public class MapOfSets<K,V>
extends Object

Helper class for keeping Lists of Objects associated with keys. WARNING: THIS CLASS IS NOT THREAD SAFE

NOTE: This API is for Lucene internal purposes only and might change in incompatible ways in the next release.

Constructor Summary

MapOfSets(Map<K,Set<V>> m)

Method Summary

Map<K,Set<V>>	getMap()
int	put(K key, V val) Adds val to the Set associated with key in the Map.
int	putAll(K key, Collection<? extends V> vals) Adds multiple vals to the Set associated with key in the Map.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MapOfSets

public MapOfSets(Map<K,Set<V>> m)

Parameters:

m - the backing store for this object

Method Detail

getMap

public Map<K,Set<V>> getMap()

Returns:

direct access to the map backing this object.

put

public int put(K key,
               V val)

Adds val to the Set associated with key in the Map. If key is not already in the map, a new Set will first be created.

Returns:

the size of the Set associated with key once val is added to it.

putAll

public int putAll(K key,
                  Collection<? extends V> vals)

Adds multiple vals to the Set associated with key in the Map. If key is not already in the map, a new Set will first be created.

Returns:

the size of the Set associated with key once val is added to it.