org.datanucleus.identity

Class IdentityManagerImpl

java.lang.Object

org.datanucleus.identity.IdentityManagerImpl

All Implemented Interfaces:

IdentityManager

public class IdentityManagerImpl
extends Object
implements IdentityManager

Manager for identity operations.

Field Summary

Fields

Modifier and Type	Field and Description
protected Class	datastoreIdClass Default DatastoreId implementation used by DataNucleus.
protected IdentityKeyTranslator	idKeyTranslator Identity key translator (if any).
protected IdentityStringTranslator	idStringTranslator Identity string translator (if any).

Fields inherited from interface org.datanucleus.identity.IdentityManager

IDENTITY_CLASS_TARGET_CLASS_NAME_FIELD

Constructor Summary

Constructors

Constructor and Description
IdentityManagerImpl(PersistenceNucleusContext nucCtx)

Method Summary

Modifier and Type	Method and Description
Object	getApplicationId(ClassLoaderResolver clr, AbstractClassMetaData acmd, String keyToString) Utility to create a new application identity when you know the metadata for the target class, and the toString() output of the identity.
Object	getApplicationId(Class cls, Object key) Method to return a new object identity for the specified class, and key (possibly toString() output).
Object	getApplicationId(Object pc, AbstractClassMetaData cmd) Method to create a new (application) identity for the passed object with the supplied MetaData (when using APPLICATION identity).
protected String	getConstructorNameForCache(Class type, Class[] ctrArgTypes)
DatastoreId	getDatastoreId(long value) Method to return a datastore-unique datastore identity, with the specified value.
DatastoreId	getDatastoreId(String idString) Method to return a datastore identity, for the specified string which comes from the output of toString().
DatastoreId	getDatastoreId(String className, Object value) Method to return a datastore identity, representing the persistable object with specified class name and key value.
Class	getDatastoreIdClass()
IdentityKeyTranslator	getIdentityKeyTranslator() Accessor for the current identity key translator to use (if any).
IdentityStringTranslator	getIdentityStringTranslator() Accessor for the current identity string translator to use (if any).
SingleFieldId	getSingleFieldId(Class idType, Class pcType, Object key) Utility to create a new SingleFieldId using reflection when you know the type of the Persistable, and also which SingleFieldId type, and the value of the key.

Methods inherited from class java.lang.Object

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

Field Detail

datastoreIdClass

protected Class datastoreIdClass

Default DatastoreId implementation used by DataNucleus.

idStringTranslator

protected IdentityStringTranslator idStringTranslator

Identity string translator (if any).

idKeyTranslator

protected IdentityKeyTranslator idKeyTranslator

Identity key translator (if any).

Constructor Detail

IdentityManagerImpl

public IdentityManagerImpl(PersistenceNucleusContext nucCtx)

Method Detail

getConstructorNameForCache

protected String getConstructorNameForCache(Class type,
                                            Class[] ctrArgTypes)

getDatastoreIdClass

public Class getDatastoreIdClass()

Specified by:

getDatastoreIdClass in interface IdentityManager

getIdentityStringTranslator

public IdentityStringTranslator getIdentityStringTranslator()

Description copied from interface: IdentityManager

Accessor for the current identity string translator to use (if any).

Specified by:

getIdentityStringTranslator in interface IdentityManager

Returns:

Identity string translator instance (or null if persistence property not set)

getIdentityKeyTranslator

public IdentityKeyTranslator getIdentityKeyTranslator()

Description copied from interface: IdentityManager

Accessor for the current identity key translator to use (if any).

Specified by:

getIdentityKeyTranslator in interface IdentityManager

Returns:

Identity key translator instance (or null if persistence property not set)

getDatastoreId

public DatastoreId getDatastoreId(String className,
                                  Object value)

Description copied from interface: IdentityManager

Method to return a datastore identity, representing the persistable object with specified class name and key value.

Specified by:

getDatastoreId in interface IdentityManager

Parameters:

className - The class name for the persistable

value - The key value for the persistable

Returns:

The datastore id

getDatastoreId

public DatastoreId getDatastoreId(long value)

Description copied from interface: IdentityManager

Method to return a datastore-unique datastore identity, with the specified value.

Specified by:

getDatastoreId in interface IdentityManager

Parameters:

value - The long value that is unique across the datastore.

Returns:

The datastore id

getDatastoreId

public DatastoreId getDatastoreId(String idString)

Description copied from interface: IdentityManager

Method to return a datastore identity, for the specified string which comes from the output of toString().

Specified by:

getDatastoreId in interface IdentityManager

Parameters:

idString - The toString() value

Returns:

The datastore id

getSingleFieldId

public SingleFieldId getSingleFieldId(Class idType,
                                      Class pcType,
                                      Object key)

Utility to create a new SingleFieldId using reflection when you know the type of the Persistable, and also which SingleFieldId type, and the value of the key.

Specified by:

getSingleFieldId in interface IdentityManager

Parameters:

idType - Type of SingleFieldId

pcType - Type of the Persistable

key - The value for the identity (the Long, or Int, or ... etc).

Returns:

Single field identity

Throws:

NucleusException - if invalid input is received

getApplicationId

public Object getApplicationId(ClassLoaderResolver clr,
                               AbstractClassMetaData acmd,
                               String keyToString)

Utility to create a new application identity when you know the metadata for the target class, and the toString() output of the identity.

Specified by:

getApplicationId in interface IdentityManager

Parameters:

clr - ClassLoader resolver

acmd - MetaData for the target class

keyToString - String form of the key

Returns:

The identity

getApplicationId

public Object getApplicationId(Object pc,
                               AbstractClassMetaData cmd)

Method to create a new (application) identity for the passed object with the supplied MetaData (when using APPLICATION identity).

Specified by:

getApplicationId in interface IdentityManager

Parameters:

pc - The persistable object

cmd - Metadata for the persistable object

Returns:

The new identity object

getApplicationId

public Object getApplicationId(Class cls,
                               Object key)

Method to return a new object identity for the specified class, and key (possibly toString() output).

Specified by:

getApplicationId in interface IdentityManager

Parameters:

cls - Persistable class

key - form of the object id

Returns:

The object identity