Package com.globalmentor.collections

Class HashSetHashMap<K,V>

java.lang.Object

com.globalmentor.collections.MapDecorator<K,C>

com.globalmentor.collections.AbstractDecoratorCollectionMap<K,V,Set<V>>

com.globalmentor.collections.HashSetHashMap<K,V>

All Implemented Interfaces:

CollectionMap<K,V,Set<V>>, Map<K,Set<V>>

public class HashSetHashMap<K,V>
extends AbstractDecoratorCollectionMap<K,V,Set<V>>

An implementation of a HashMap that stores an HashSet of values for each key, with special methods for retrieving single values.

Author:

Garret Wilson

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Field Summary

Fields inherited from class com.globalmentor.collections.MapDecorator

map

Constructor Summary

Constructors

Constructor	Description
HashSetHashMap()	Default constructor that decorates a HashMap.
HashSetHashMap(int initialCapacity)	Initial capacity constructor that decorates a HashMap.

Method Summary

Modifier and Type	Method	Description
Set<V>	createCollection()	Creates a collection in which to store values.

Methods inherited from class com.globalmentor.collections.AbstractDecoratorCollectionMap

addItem, getCollection, getItem, getItemCount, getItems, hasItems, removeItem

Methods inherited from class com.globalmentor.collections.MapDecorator

clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

Constructor Details

HashSetHashMap

public HashSetHashMap()

Default constructor that decorates a HashMap.

HashSetHashMap

public HashSetHashMap(int initialCapacity)

Initial capacity constructor that decorates a HashMap.

Parameters:

initialCapacity - the initial capacity.

Throws:

IllegalArgumentException - if the initial capacity is negative.

Method Details

createCollection

public Set<V> createCollection()

Creates a collection in which to store values. This version returns an HashSet.

Returns:

The collections with the values stored.