Package org.jgrapes.core

Class TypedIdKey<V>

java.lang.Object

org.jgrapes.core.TypedIdKey<V>

All Implemented Interfaces:

Serializable

public final class TypedIdKey<V>
extends Object
implements Serializable

Combines a type and an id value to a key for an Associator or Map.

This kind of key can be used if an instance of the type as key is too specific (or objects should not be kept alive only because they are used as keys) and the identifier alone cannot be guaranteed to be unique.

See Also:

• Serialized Form

Method Summary

Modifier and Type	Method	Description
static <V> V	associate(Associator associator, Serializable id, V value)	Associates the given value’s type and the id with the given value using the given associator.
static <V> Optional<V>	associated(Associator associator, Class<V> type, Serializable id)	Retrieves a value with the given type and id from the given associator.
boolean	equals(Object obj)
static <V> Optional<V>	get(Map<?,?> map, Class<V> type, Serializable id)	Retrieves a value with the given type and id from the given map.
int	hashCode()
static <V> V	put(Map<? super TypedIdKey<V>,? super V> map, Serializable id, V value)	Associates the given value’s type and the id with the given value using the given map.
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

associate

public static <V> V associate(Associator associator,
 Serializable id,
 V value)

Associates the given value’s type and the id with the given value using the given associator.

Type Parameters:

V - the value type

Parameters:

associator - the associator

id - the id

value - the value

Returns:

the value for easy chaining

put

public static <V> V put(Map<? super TypedIdKey<V>,? super V> map,
 Serializable id,
 V value)

Associates the given value’s type and the id with the given value using the given map.

Type Parameters:

V - the value type

Parameters:

map - the map

id - the id

value - the value

Returns:

the value for easy chaining

associated

public static <V> Optional<V> associated(Associator associator,
 Class<V> type,
 Serializable id)

Retrieves a value with the given type and id from the given associator.

Type Parameters:

V - the value type

Parameters:

associator - the associator

type - the type

id - the id

Returns:

the associated value, if any

get

public static <V> Optional<V> get(Map<?,?> map,
 Class<V> type,
 Serializable id)

Retrieves a value with the given type and id from the given map.

Type Parameters:

V - the value type

Parameters:

map - the map

type - the type

id - the id

Returns:

the associated value, if any

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object