cz.cuni.amis.utils.maps

Class WeakHashQuadMap<PRIMARY_KEY,SECONDARY_KEY,TERTIARY_KEY,QUATERNARY_KEY,ITEM>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.WeakHashMap<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

cz.cuni.amis.utils.maps.WeakHashQuadMap<PRIMARY_KEY,SECONDARY_KEY,TERTIARY_KEY,QUATERNARY_KEY,ITEM>

Type Parameters:

PRIMARY_KEY -

SECONDARY_KEY -

TERTIARY_KEY -

QUATERNARY_KEY -

ITEM -

All Implemented Interfaces:

Map<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

public class WeakHashQuadMap<PRIMARY_KEY,SECONDARY_KEY,TERTIARY_KEY,QUATERNARY_KEY,ITEM>
extends WeakHashMap<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

A 4-level hashMap, the PrimaryKeys are weakly referenced. Get methods of all levels assure that the corresponding maps are created.

Author:

srlok

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

Constructors

Constructor and Description
WeakHashQuadMap()
WeakHashQuadMap(int primaryCapacity, int secondaryCapacity, int tertiaryCapacity, int quaternaryCapacity)

Method Summary

Methods

Modifier and Type	Method and Description
Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>	get(Object key)
Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>	get(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey) If the requested secondLevel map does not exist an empty one is created, inserted according to the primaryKey and returned.
Map<QUATERNARY_KEY,ITEM>	get(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey, TERTIARY_KEY tertiaryKey) If the requested level 3 map does not exist an empty one is created, inserted and returned.
ITEM	get(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey, TERTIARY_KEY tertiaryKey, QUATERNARY_KEY quaternaryKey) Returns null if the mapping is not present.
ITEM	put(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey, TERTIARY_KEY tertiaryKey, QUATERNARY_KEY quaternaryKey, ITEM item) Returns the inserted item.
Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>	remove(Object key)
Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>	remove(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey)
Map<QUATERNARY_KEY,ITEM>	remove(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey, TERTIARY_KEY tertiaryKey)
ITEM	remove(PRIMARY_KEY primaryKey, SECONDARY_KEY secondaryKey, TERTIARY_KEY tertiaryKey, QUATERNARY_KEY quaternaryKey)

Methods inherited from class java.util.WeakHashMap

clear, containsKey, containsValue, entrySet, isEmpty, keySet, put, putAll, size, values

Methods inherited from class java.util.AbstractMap

clone, equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

WeakHashQuadMap

public WeakHashQuadMap()

WeakHashQuadMap

public WeakHashQuadMap(int primaryCapacity,
               int secondaryCapacity,
               int tertiaryCapacity,
               int quaternaryCapacity)

Method Detail

get

public Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>> get(Object key)

Specified by:

get in interface Map<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

Overrides:

get in class WeakHashMap<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

get

public Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>> get(PRIMARY_KEY primaryKey,
                                             SECONDARY_KEY secondaryKey)

If the requested secondLevel map does not exist an empty one is created, inserted according to the primaryKey and returned.

Parameters:

primaryKey -

secondaryKey -

Returns:

get

public Map<QUATERNARY_KEY,ITEM> get(PRIMARY_KEY primaryKey,
                           SECONDARY_KEY secondaryKey,
                           TERTIARY_KEY tertiaryKey)

If the requested level 3 map does not exist an empty one is created, inserted and returned.

Parameters:

primaryKey -

secondaryKey -

tertiaryKey -

Returns:

get

public ITEM get(PRIMARY_KEY primaryKey,
       SECONDARY_KEY secondaryKey,
       TERTIARY_KEY tertiaryKey,
       QUATERNARY_KEY quaternaryKey)

Returns null if the mapping is not present.

Parameters:

primaryKey -

secondaryKey -

tertiaryKey -

quaternaryKey -

Returns:

put

public ITEM put(PRIMARY_KEY primaryKey,
       SECONDARY_KEY secondaryKey,
       TERTIARY_KEY tertiaryKey,
       QUATERNARY_KEY quaternaryKey,
       ITEM item)

Returns the inserted item.

Parameters:

primaryKey -

secondaryKey -

tertiaryKey -

quaternaryKey -

item -

Returns:

remove

public Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>> remove(Object key)

Specified by:

remove in interface Map<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

Overrides:

remove in class WeakHashMap<PRIMARY_KEY,Map<SECONDARY_KEY,Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>>>>

remove

public Map<TERTIARY_KEY,Map<QUATERNARY_KEY,ITEM>> remove(PRIMARY_KEY primaryKey,
                                                SECONDARY_KEY secondaryKey)

remove

public Map<QUATERNARY_KEY,ITEM> remove(PRIMARY_KEY primaryKey,
                              SECONDARY_KEY secondaryKey,
                              TERTIARY_KEY tertiaryKey)

remove

public ITEM remove(PRIMARY_KEY primaryKey,
          SECONDARY_KEY secondaryKey,
          TERTIARY_KEY tertiaryKey,
          QUATERNARY_KEY quaternaryKey)