Package org.apache.commons.collections4.multimap

Class AbstractSetValuedMap<K,V>

java.lang.Object

org.apache.commons.collections4.multimap.AbstractMultiValuedMap<K,V>

org.apache.commons.collections4.multimap.AbstractSetValuedMap<K,V>

Type Parameters:

K - the type of the keys in this map

V - the type of the values in this map

All Implemented Interfaces:

MultiValuedMap<K,V>, SetValuedMap<K,V>

Direct Known Subclasses:

HashSetValuedHashMap

public abstract class AbstractSetValuedMap<K,V>
extends AbstractMultiValuedMap<K,V>
implements SetValuedMap<K,V>

Abstract implementation of the SetValuedMap interface to simplify the creation of subclass implementations.

Subclasses specify a Map implementation to use as the internal storage and the Set implementation to use as values.

Since:

4.1

Method Summary

Modifier and Type	Method	Description
Set<V>	get(K key)	Gets the set of values associated with the specified key.
Set<V>	remove(Object key)	Removes all values associated with the specified key.

Methods inherited from class org.apache.commons.collections4.multimap.AbstractMultiValuedMap

asMap, clear, containsKey, containsMapping, containsValue, entries, equals, hashCode, isEmpty, keys, keySet, mapIterator, put, putAll, putAll, putAll, removeMapping, size, toString, values

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.commons.collections4.MultiValuedMap

asMap, clear, containsKey, containsMapping, containsValue, entries, isEmpty, keys, keySet, mapIterator, put, putAll, putAll, putAll, removeMapping, size, values

Method Details

get

public Set<V> get(K key)

Gets the set of values associated with the specified key. This would return an empty set in case the mapping is not present

Specified by:

get in interface MultiValuedMap<K,V>

Specified by:

get in interface SetValuedMap<K,V>

Overrides:

get in class AbstractMultiValuedMap<K,V>

Parameters:

key - the key to retrieve

Returns:

the Set of values, will return an empty Set for no mapping

remove

public Set<V> remove(Object key)

Removes all values associated with the specified key.

A subsequent get(Object) would return an empty set.

Specified by:

remove in interface MultiValuedMap<K,V>

Specified by:

remove in interface SetValuedMap<K,V>

Overrides:

remove in class AbstractMultiValuedMap<K,V>

Parameters:

key - the key to remove values from

Returns:

the Set of values removed, will return an empty, unmodifiable set for no mapping found.