Package org.apache.cayenne

Interface ObjectId

All Superinterfaces:

Serializable

public interface ObjectId
extends Serializable

A portable global identifier for persistent objects. ObjectId can be temporary (used for transient or new uncommitted objects) or permanent (used for objects that have been already stored in DB).

A temporary ObjectId stores object entity name and a pseudo-unique binary key; permanent id stores a map of values from an external persistent store (aka "primary key").

Method Summary

Modifier and Type	Method	Description
ObjectId	createReplacementId()
String	getEntityName()
Map<String,Object>	getIdSnapshot()
byte[]	getKey()
Map<String,Object>	getReplacementIdMap()
boolean	isReplacementIdAttached()
boolean	isTemporary()
static ObjectId	of(String entityName)	Creates a temporary ObjectId for a given entity.
static ObjectId	of(String entityName, byte[] tmpKey)	Creates a temporary ObjectId for a given entity, using provided unique id key.
static ObjectId	of(String entityName, String keyName, Object value)	Creates a single key/value permanent ObjectId.
static ObjectId	of(String entityName, Map<String,?> values)	Creates an ObjectId, potentially mapped to multiple columns.
static ObjectId	of(String entityName, ObjectId objectId)	Creates an ObjectId using another id as a template, but for a different entity.

Method Details

of

static ObjectId of(String entityName)

Creates a temporary ObjectId for a given entity.

Since:

4.2

of

static ObjectId of(String entityName,
 byte[] tmpKey)

Creates a temporary ObjectId for a given entity, using provided unique id key.

Since:

4.2

of

static ObjectId of(String entityName,
 String keyName,
 Object value)

Creates a single key/value permanent ObjectId.

Since:

4.2

of

static ObjectId of(String entityName,
 ObjectId objectId)

Creates an ObjectId using another id as a template, but for a different entity. Useful inside the Cayenne stack when resolving inheritance hierarchies.

Since:

4.2

of

static ObjectId of(String entityName,
 Map<String,?> values)

Creates an ObjectId, potentially mapped to multiple columns.

Since:

4.2

isTemporary

boolean isTemporary()

getEntityName

String getEntityName()

getKey

byte[] getKey()

getIdSnapshot

Map<String,Object> getIdSnapshot()

getReplacementIdMap

Map<String,Object> getReplacementIdMap()

createReplacementId

ObjectId createReplacementId()

isReplacementIdAttached

boolean isReplacementIdAttached()