com.fasterxml.jackson.annotation

Class ObjectIdGenerators.UUIDGenerator

java.lang.Object

com.fasterxml.jackson.annotation.ObjectIdGenerator<T>

com.fasterxml.jackson.annotation.ObjectIdGenerators.UUIDGenerator

All Implemented Interfaces:

Serializable

Enclosing class:

ObjectIdGenerators

public static final class ObjectIdGenerators.UUIDGenerator
extends ObjectIdGenerator<T>

Implementation that just uses UUIDs as reliably unique identifiers: downside is that resulting String is 36 characters long.

One difference to other generators is that scope is always set as Object.class (regardless of arguments): this because UUIDs are globally unique, and scope has no meaning.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.fasterxml.jackson.annotation.ObjectIdGenerator

ObjectIdGenerator.IdKey

Constructor Summary

Constructors

Constructor and Description
UUIDGenerator()

Method Summary

Modifier and Type	Method and Description
boolean	canUseFor(ObjectIdGenerator<?> gen) Since UUIDs are always unique, let's fully ignore scope definition
ObjectIdGenerator<UUID>	forScope(Class<?> scope) Can just return base instance since this is essentially scopeless
UUID	generateId(Object forPojo) Method used for generating a new Object Identifier to serialize for given POJO.
ObjectIdGenerator.IdKey	key(Object key) Method for constructing key to use for ObjectId-to-POJO maps.
ObjectIdGenerator<UUID>	newForSerialization(Object context) Can just return base instance since this is essentially scopeless

Methods inherited from class com.fasterxml.jackson.annotation.ObjectIdGenerator

isValidReferencePropertyName, maySerializeAsObject

Methods inherited from class java.lang.Object

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

Constructor Detail

UUIDGenerator

public UUIDGenerator()

Method Detail

forScope

public ObjectIdGenerator<UUID> forScope(Class<?> scope)

Can just return base instance since this is essentially scopeless

Specified by:

forScope in class ObjectIdGenerator<UUID>

newForSerialization

public ObjectIdGenerator<UUID> newForSerialization(Object context)

Can just return base instance since this is essentially scopeless

Specified by:

newForSerialization in class ObjectIdGenerator<UUID>

Parameters:

context - Serialization context object used (of type com.fasterxml.jackson.databind.SerializerProvider); may be needed by more complex generators to access contextual information such as configuration.

generateId

public UUID generateId(Object forPojo)

Description copied from class: ObjectIdGenerator

Method used for generating a new Object Identifier to serialize for given POJO.

Parameters:

forPojo - POJO for which identifier is needed

Returns:

Object Identifier to use.

key

public ObjectIdGenerator.IdKey key(Object key)

Description copied from class: ObjectIdGenerator

Method for constructing key to use for ObjectId-to-POJO maps.

Specified by:

key in class ObjectIdGenerator<UUID>

canUseFor

public boolean canUseFor(ObjectIdGenerator<?> gen)

Since UUIDs are always unique, let's fully ignore scope definition

Returns:

True if this instance can be used as-is; false if not