com.aspc.remote.memory

Class FasterWeakHashMap

java.lang.Object

java.util.AbstractMap<K,V>

java.util.WeakHashMap

com.aspc.remote.memory.FasterWeakHashMap

All Implemented Interfaces:

java.util.Map

public class FasterWeakHashMap
extends java.util.WeakHashMap

This is a hacked version of HashMap for longs only keys. It prevents us from having to create objects for keys.
THREAD MODE: SINGLE-THREADED

Since:

29 March 2002

Author:

Nigel Leck

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor and Description
FasterWeakHashMap(int initialCapacity) Constructs a new, empty map with the specified initial capacity and default load factor, which is 0.75.

Method Summary

Modifier and Type	Method and Description
void	clear() call super and clear cache
java.lang.ref.WeakReference[]	listKeyReferences() list of keys and weak references.
java.lang.Object	put(java.lang.Object key, java.lang.Object value) call super and clear cache
java.lang.Object	remove(java.lang.Object key) call super and clear cache

Methods inherited from class java.util.WeakHashMap

containsKey, containsValue, entrySet, forEach, get, isEmpty, keySet, putAll, replaceAll, 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

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

Constructor Detail

FasterWeakHashMap

public FasterWeakHashMap(int initialCapacity)

Constructs a new, empty map with the specified initial capacity and default load factor, which is 0.75.

Parameters:

initialCapacity - the initial capacity of the HashMap.

Method Detail

put

@Nullable
public java.lang.Object put(java.lang.Object key,
                                      java.lang.Object value)

call super and clear cache

Specified by:

put in interface java.util.Map

Overrides:

put in class java.util.WeakHashMap

Parameters:

key - the key to put

value - the value to be place.

Returns:

the removed value.

remove

@Nullable
public java.lang.Object remove(java.lang.Object key)

call super and clear cache

Specified by:

remove in interface java.util.Map

Overrides:

remove in class java.util.WeakHashMap

Parameters:

key - the key to remove

Returns:

the removed value.

clear

public void clear()

call super and clear cache

Specified by:

clear in interface java.util.Map

Overrides:

clear in class java.util.WeakHashMap

listKeyReferences

@CheckReturnValue
 @Nonnull
public java.lang.ref.WeakReference[] listKeyReferences()

list of keys and weak references.

Returns:

the weak reference keys