Package org.hibernate.util

Class IdentityMap

java.lang.Object

org.hibernate.util.IdentityMap

All Implemented Interfaces:

Map

public final class IdentityMap
extends Object
implements Map

A Map where keys are compared by object identity, rather than equals().

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	IdentityMap.IdentityKey
static final class	IdentityMap.IdentityMapEntry

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

Map.Entry<K,V>

Method Summary

Modifier and Type	Method	Description
void	clear()
static Map.Entry[]	concurrentEntries(Map map)	Return the map entries (as instances of Map.Entry in a collection that is safe from concurrent modification).
boolean	containsKey(Object key)
boolean	containsValue(Object val)
static Map	deserialize(Object o)	Workaround for a JDK 1.4.1 bug where IdentityHashMaps are not correctly deserialized.
static List	entries(Map map)
Map.Entry[]	entryArray()
List	entryList()
Set	entrySet()
Object	get(Object key)
static Map	instantiate(int size)	Return a new instance of this class, with an undefined iteration order.
static Map	instantiateSequenced(int size)	Return a new instance of this class, with iteration order defined as the order in which entries were added
static Map	invert(Map map)
boolean	isEmpty()
Iterator	keyIterator()
static Iterator	keyIterator(Map map)
Set	keySet()
Object	put(Object key, Object value)
void	putAll(Map otherMap)
Object	remove(Object key)
static Object	serialize(Map map)	Workaround for a JDK 1.4.1 bug where IdentityHashMaps are not correctly deserialized.
int	size()
String	toString()
Collection	values()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

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

Method Details

instantiate

public static Map instantiate(int size)

Return a new instance of this class, with an undefined iteration order.

Parameters:

size - The size of the map

Returns:

Map

instantiateSequenced

public static Map instantiateSequenced(int size)

Return a new instance of this class, with iteration order defined as the order in which entries were added

Parameters:

size - The size of the map to create

Returns:

concurrentEntries

public static Map.Entry[] concurrentEntries(Map map)

Return the map entries (as instances of Map.Entry in a collection that is safe from concurrent modification). ie. we may safely add new instances to the underlying Map during iteration of the entries().

Parameters:

map -

Returns:

Collection

entries

public static List entries(Map map)

keyIterator

public static Iterator keyIterator(Map map)

keyIterator

public Iterator keyIterator()

size

public int size()

Specified by:

size in interface Map

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface Map

containsValue

public boolean containsValue(Object val)

Specified by:

containsValue in interface Map

get

public Object get(Object key)

Specified by:

get in interface Map

put

public Object put(Object key,
 Object value)

Specified by:

put in interface Map

remove

public Object remove(Object key)

Specified by:

remove in interface Map

putAll

public void putAll(Map otherMap)

Specified by:

putAll in interface Map

clear

public void clear()

Specified by:

clear in interface Map

keySet

public Set keySet()

Specified by:

keySet in interface Map

values

public Collection values()

Specified by:

values in interface Map

entrySet

public Set entrySet()

Specified by:

entrySet in interface Map

entryList

public List entryList()

entryArray

public Map.Entry[] entryArray()

serialize

public static Object serialize(Map map)

Workaround for a JDK 1.4.1 bug where IdentityHashMaps are not correctly deserialized.

Parameters:

map -

Returns:

Object

deserialize

public static Map deserialize(Object o)

Workaround for a JDK 1.4.1 bug where IdentityHashMaps are not correctly deserialized.

Parameters:

o -

Returns:

Map

toString

public String toString()

Overrides:

toString in class Object

invert

public static Map invert(Map map)