Package org.apache.commons.collections4.multimap

Class AbstractListValuedMap<K,V>

java.lang.Object

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

org.apache.commons.collections4.multimap.AbstractListValuedMap<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:

ListValuedMap<K,V>, MultiValuedMap<K,V>

Direct Known Subclasses:

ArrayListValuedHashMap

public abstract class AbstractListValuedMap<K,V>
extends AbstractMultiValuedMap<K,V>
implements ListValuedMap<K,V>

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

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

Since:

4.1

Method Summary

Modifier and Type	Method	Description
List<V>	get(K key)	Gets the list of values associated with the specified key.
List<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 List<V> get(K key)

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

Specified by:

get in interface ListValuedMap<K,V>

Specified by:

get in interface MultiValuedMap<K,V>

Overrides:

get in class AbstractMultiValuedMap<K,V>

Parameters:

key - the key to retrieve

Returns:

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

remove

public List<V> remove(Object key)

Removes all values associated with the specified key.

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

Specified by:

remove in interface ListValuedMap<K,V>

Specified by:

remove in interface MultiValuedMap<K,V>

Overrides:

remove in class AbstractMultiValuedMap<K,V>

Parameters:

key - the key to remove values from

Returns:

the List of values removed, will return an empty, unmodifiable list for no mapping found.