dk.brics.tajs.util

Class HybridArrayHashMap<K,V>

java.lang.Object

dk.brics.tajs.util.HybridArrayHashMap<K,V>

All Implemented Interfaces:

Map<K,V>

public final class HybridArrayHashMap<K,V>
extends Object
implements Map<K,V>

Hybrid of array and hash map. Small maps are represented as arrays; above a certain threshold a hash map is used instead. Moreover, empty maps and singleton maps are represented with just a reference. Keys cannot be null;

Nested Class Summary

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

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
HybridArrayHashMap() Constructs a new empty hybrid map.
HybridArrayHashMap(Map<K,V> m) Constructs a new hybrid map from the given map.

Method Summary

Methods

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
Set<Map.Entry<K,V>>	entrySet()
boolean	equals(Object obj)
V	get(Object key)
int	hashCode()
boolean	isEmpty()
Set<K>	keySet()
V	put(K key, V value)
void	putAll(Map<? extends K,? extends V> m)
V	remove(Object key)
int	size()
String	toString()
Collection<V>	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

HybridArrayHashMap

public HybridArrayHashMap()

Constructs a new empty hybrid map.

HybridArrayHashMap

public HybridArrayHashMap(Map<K,V> m)

Constructs a new hybrid map from the given map.

Method Detail

clear

public void clear()

Specified by:

clear in interface Map<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface Map<K,V>

entrySet

public Set<Map.Entry<K,V>> entrySet()

Specified by:

entrySet in interface Map<K,V>

equals

public boolean equals(Object obj)

Specified by:

equals in interface Map<K,V>

Overrides:

equals in class Object

get

public V get(Object key)

Specified by:

get in interface Map<K,V>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,V>

Overrides:

hashCode in class Object

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<K,V>

keySet

public Set<K> keySet()

Specified by:

keySet in interface Map<K,V>

put

public V put(K key,
    V value)

Specified by:

put in interface Map<K,V>

putAll

public void putAll(Map<? extends K,? extends V> m)

Specified by:

putAll in interface Map<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface Map<K,V>

size

public int size()

Specified by:

size in interface Map<K,V>

toString

public String toString()

Overrides:

toString in class Object

values

public Collection<V> values()

Specified by:

values in interface Map<K,V>