jadex.commons.collection

Class BiHashMap<K,V>

java.lang.Object

jadex.commons.collection.BiHashMap<K,V>

All Implemented Interfaces:

java.util.Map<K,V>

public class BiHashMap<K,V>
extends java.lang.Object
implements java.util.Map<K,V>

A bidirectional hash map. Note using this implies a bijection (1:1 relation).

Nested Class Summary

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

java.util.Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.HashMap<K,V>	forward The forward map.
protected java.util.HashMap<V,K>	reverse The reverse map.

Constructor Summary

Constructors

Constructor and Description
BiHashMap()

Method Summary

Modifier and Type	Method and Description
void	clear() Clears the map.
boolean	containsKey(java.lang.Object key) Returns whether the forward map contains the specified key.
boolean	containsValue(java.lang.Object value) Returns whether the reverse map contains the specified key.
java.util.Set<java.util.Map.Entry<K,V>>	entrySet() Returns the entry set of the forward map.
V	get(java.lang.Object key) Returns the value of the key from the forward map.
boolean	isEmpty() Tests if the map is empty.
java.util.Set<K>	keySet() Returns the keys of the forward map.
V	put(K key, V value) Puts an entry into the map, forward direction.
void	putAll(java.util.Map<? extends K,? extends V> m) Puts all entries of a map into this map, forward direction.
V	remove(java.lang.Object key) Removes an entry, forward direction.
java.util.Set<java.util.Map.Entry<V,K>>	rentrySet() Returns the entry set of the reverse map.
K	rget(java.lang.Object key) Returns the value of the key from the reverse map.
void	rputAll(java.util.Map<? extends V,? extends K> m) Puts all entries of a map into this map, reverse direction.
K	rremove(java.lang.Object key) Removes an entry, reverse direction.
int	size() Returns the size of the map.
java.util.Collection<V>	values() Returns the keys of the reverse map.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll

Field Detail

forward

protected java.util.HashMap<K,V> forward

The forward map.

reverse

protected java.util.HashMap<V,K> reverse

The reverse map.

Constructor Detail

BiHashMap

public BiHashMap()

Method Detail

clear

public void clear()

Clears the map.

Specified by:

clear in interface java.util.Map<K,V>

containsKey

public boolean containsKey(java.lang.Object key)

Returns whether the forward map contains the specified key.

Specified by:

containsKey in interface java.util.Map<K,V>

Parameters:

key - The key.

Returns:

True, if the forward map contains key.

containsValue

public boolean containsValue(java.lang.Object value)

Returns whether the reverse map contains the specified key.

Specified by:

containsValue in interface java.util.Map<K,V>

Parameters:

key - The key.

Returns:

True, if the reverse map contains key.

entrySet

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

Returns the entry set of the forward map.

Specified by:

entrySet in interface java.util.Map<K,V>

Returns:

The entry set of the forward map.

rentrySet

public java.util.Set<java.util.Map.Entry<V,K>> rentrySet()

Returns the entry set of the reverse map.

Returns:

The entry set of the reverse map.

get

public V get(java.lang.Object key)

Returns the value of the key from the forward map.

Specified by:

get in interface java.util.Map<K,V>

Returns:

The value.

rget

public K rget(java.lang.Object key)

Returns the value of the key from the reverse map.

Returns:

The value.

isEmpty

public boolean isEmpty()

Tests if the map is empty.

Specified by:

isEmpty in interface java.util.Map<K,V>

Returns:

True, if empty.

keySet

public java.util.Set<K> keySet()

Returns the keys of the forward map.

Specified by:

keySet in interface java.util.Map<K,V>

Returns:

The keys.

put

public V put(K key,
             V value)

Puts an entry into the map, forward direction.

Specified by:

put in interface java.util.Map<K,V>

Parameters:

key - The key.

value - The value.

Returns:

The value.

size

public int size()

Returns the size of the map.

Specified by:

size in interface java.util.Map<K,V>

Returns:

The size of the map.

remove

public V remove(java.lang.Object key)

Removes an entry, forward direction.

Specified by:

remove in interface java.util.Map<K,V>

Parameters:

key - The entry key.

Returns:

The removed value.

rremove

public K rremove(java.lang.Object key)

Removes an entry, reverse direction.

Parameters:

key - The entry key.

Returns:

The removed value.

putAll

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

Puts all entries of a map into this map, forward direction.

Specified by:

putAll in interface java.util.Map<K,V>

Parameters:

m - The map.

rputAll

public void rputAll(java.util.Map<? extends V,? extends K> m)

Puts all entries of a map into this map, reverse direction.

Parameters:

m - The map.

values

public java.util.Collection<V> values()

Returns the keys of the reverse map.

Specified by:

values in interface java.util.Map<K,V>

Returns:

The keys.