oracle.javatools.util

Class Maps.WeakHashMap<K,V>

java.lang.Object

oracle.javatools.util.Maps.AbstractHashMap<K,V,Maps.WeakEntry<K,V>>

oracle.javatools.util.Maps.WeakHashMap<K,V>

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map<K,V>

Enclosing class:

Maps

public static class Maps.WeakHashMap<K,V>
extends Maps.AbstractHashMap<K,V,Maps.WeakEntry<K,V>>

An implementation of Maps.AbstractHashMap, based on Maps.WeakEntry, which holds its values with WeakReferences.

See Also:

Serialized Form

Nested Class Summary

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

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

Field Summary

Fields inherited from class oracle.javatools.util.Maps.AbstractHashMap

DEFAULT_INITIAL_CAPACITY, DEFAULT_LOAD_FACTOR, MAXIMUM_CAPACITY

Constructor Summary

Constructors

Constructor and Description
Maps.WeakHashMap() Constructs an empty weak-referencing map with default capacity and load factor.
Maps.WeakHashMap(int initialCapacity) Constructs an empty weak-referencing map with specified initial capacity and default load factor.
Maps.WeakHashMap(int initialCapacity, float loadFactor) Constructs an empty weak-referencing map with specified initial capacity and load factor.
Maps.WeakHashMap(java.util.Map<? extends K,? extends V> map) Constructs a weak-referencing map with specified initial mappings, initial capacity based on the number of initial mappings, and default load factor.

Method Summary

Methods

Modifier and Type	Method and Description
protected Maps.WeakEntry<K,V>	createEntry(int hash, K key, V value, Maps.WeakEntry<K,V> next) Creates an entry for this map.

Methods inherited from class oracle.javatools.util.Maps.AbstractHashMap

addEntry, capacity, change, clear, clone, containsKey, containsValue, createEntryIterator, createEntrySetIterator, createKeySetIterator, createValuesIterator, entryAccessed, entryAdded, entryChanged, entryPurged, entryRemoved, entrySet, equals, get, getChangeCount, getEntry, getQueue, hashCode, isEmpty, keyEquals, keyHashCode, keySet, loadFactor, mapChanged, mapConstructed, mapInitialized, purge, purgeEntry, put, putAll, remove, removeExistingEntry, removeKey, size, toString, valueEquals, valueHashCode, values

Methods inherited from class java.lang.Object

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

Constructor Detail

Maps.WeakHashMap

public Maps.WeakHashMap()

Constructs an empty weak-referencing map with default capacity and load factor.

See Also:

Maps.AbstractHashMap.DEFAULT_INITIAL_CAPACITY, Maps.AbstractHashMap.DEFAULT_LOAD_FACTOR

Maps.WeakHashMap

public Maps.WeakHashMap(int initialCapacity)

Constructs an empty weak-referencing map with specified initial capacity and default load factor.

Parameters:

initialCapacity - the initial capacity.

Throws:

java.lang.IllegalArgumentException - if the initial capacity is negative.

See Also:

Maps.AbstractHashMap.DEFAULT_LOAD_FACTOR

Maps.WeakHashMap

public Maps.WeakHashMap(int initialCapacity,
                float loadFactor)

Constructs an empty weak-referencing map with specified initial capacity and load factor.

Parameters:

initialCapacity - the initial capacity.

loadFactor - the load factor.

Throws:

java.lang.IllegalArgumentException - if the initial capacity is negative or the load factor is nonpositive.

Maps.WeakHashMap

public Maps.WeakHashMap(java.util.Map<? extends K,? extends V> map)

Constructs a weak-referencing map with specified initial mappings, initial capacity based on the number of initial mappings, and default load factor.

Parameters:

map - A map providing initial mappings.

Throws:

java.lang.NullPointerException - if the specified map is null.

See Also:

Maps.AbstractHashMap.DEFAULT_LOAD_FACTOR

Method Detail

createEntry

protected Maps.WeakEntry<K,V> createEntry(int hash,
                              K key,
                              V value,
                              Maps.WeakEntry<K,V> next)

Creates an entry for this map.

The Maps.WeakHashMap implementation creates Maps.WeakEntry entries.

Specified by:

createEntry in class Maps.AbstractHashMap<K,V,Maps.WeakEntry<K,V>>

Parameters:

hash - The hashCode of the key for this entry.

key - The key for this entry.

value - The value for this entry.

next - The entry to follow this entry in the entry chain.