Module org.eclipse.persistence.jpa

Package org.eclipse.persistence.internal.jpa

Class EntityManagerImpl

java.lang.Object

org.eclipse.persistence.internal.jpa.EntityManagerImpl

All Implemented Interfaces:

EntityManager, AutoCloseable, JpaEntityManager

public class EntityManagerImpl
extends Object
implements JpaEntityManager

Purpose: Contains the implementation of the EntityManager.

Description: This class provides the implementation for the combined EclipseLink and JPA EntityManager class.

Responsibilities: It is responsible for tracking transaction state and the objects within that transaction.

Since:

TopLink Essentials - JPA 1.0

See Also:

• EntityManager
• JpaEntityManager

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static enum	EntityManagerImpl.OperationType

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	beginEarlyTransaction	Join existing transaction property, allows reading through write connection.
protected boolean	cacheStoreBypass	Property to avoid writing to the cache on commit (merge)
protected boolean	closeOnCommit	Property to avoid resuming unit of work if going to be closed on commit anyway.
protected UnitOfWork.CommitOrderType	commitOrder	Allow updates to be ordered by id to avoid possible deadlocks.
protected boolean	commitWithoutPersistRules
protected Map<String,ConnectionPolicy>	connectionPolicies	In case of composite persistence unit this map is used instead of connectionPolicy attribute.
protected ConnectionPolicy	connectionPolicy	Connection policy used to create ClientSession, allows using a different pool/connection/exclusive connections.
protected AbstractSession	databaseSession	References the DatabaseSession that this deployment is using.
protected RepeatableWriteUnitOfWork	extendedPersistenceContext	Stores the UnitOfWork representing the persistence context.
protected EntityManagerFactoryDelegate	factory	References to the parent factory that has created this entity manager.
protected String	flushClearCache	The FlashClearCache mode to be used.
protected FlushModeType	flushMode	Flush mode property, allows flush before query to be avoided.
protected boolean	isOpen	Store if this entity manager has been closed.
protected WeakHashMap<QueryImpl,QueryImpl>	openQueriesMap	Keep a list of openQueries that are executed in this entity manager.
protected boolean	persistOnCommit	Property to avoid discover new objects in unit of work if application always uses persist.
protected Map<String,Object>	properties	Local properties passed from createEntityManager.
protected AbstractSession	readOnlySession	Stores a session used for read-only queries.
protected ReferenceMode	referenceMode	Reference mode property, allows weak unit of work references to allow garbage collection during a transaction.
protected boolean	shouldValidateExistence	Determine if does-exist should be performed on persist.
protected SynchronizationType	syncType	Tracks if this EntityManager should automatically associate with the transaction or not

Constructor Summary

Constructors

Constructor	Description
EntityManagerImpl(String sessionName)	Constructor returns an EntityManager assigned to the a particular DatabaseSession.
EntityManagerImpl(EntityManagerFactoryDelegate factory, Map properties, SynchronizationType syncType)	Constructor called from the EntityManagerFactory to create an EntityManager
EntityManagerImpl(AbstractSession databaseSession, SynchronizationType syncType)	Constructor called from the EntityManagerFactory to create an EntityManager
EntityManagerImpl(AbstractSession databaseSession, Map properties, SynchronizationType syncType)	Constructor called from the EntityManagerFactory to create an EntityManager

Method Summary

Modifier and Type	Method	Description
void	addOpenQuery(QueryImpl query)	Queries that leave the connection and are executed against this entity manager will be added here.
protected Object	checkForTransaction(boolean validateExistence)	Return the current, joined transaction object.
void	clear()	Clear the persistence context, causing all managed entities to become detached.
void	close()	Closes this EntityManager.
protected void	closeOpenQueries()	Close any open queries executed against this entity manager.0
boolean	contains(Object entity)	Check if the instance belongs to the current persistence context.
protected boolean	contains(Object entity, UnitOfWork uow)	Check if the instance belongs to the current persistence context.
Object	copy(Object entityOrEntities, AttributeGroup group)	This method will return copy the passed entity using the passed AttributeGroup.
protected void	createConnectionPolicies(Map mapOfProperties)	Create connection policy using properties.
protected void	createConnectionPolicy()	Create connection policy using properties.
protected static ConnectionPolicy	createConnectionPolicy(ServerSession serverSession, Map properties)	Create connection policy using properties.
Query	createDescriptorNamedQuery(String queryName, Class<?> descriptorClass)	This method will create a query object that wraps a EclipseLink Named Query.
Query	createDescriptorNamedQuery(String queryName, Class<?> descriptorClass, List argumentTypes)	This method will create a query object that wraps a EclipseLink Named Query.
<T> EntityGraph<T>	createEntityGraph(Class<T> rootType)
EntityGraph	createEntityGraph(String graphName)
Query	createNamedQuery(String name)	Create an instance of Query for executing a named query (in EJBQL or native SQL).
<T> TypedQuery<T>	createNamedQuery(String name, Class<T> resultClass)	Create an instance of TypedQuery for executing a named query (in the Java Persistence query language or in native SQL).
StoredProcedureQuery	createNamedStoredProcedureQuery(String name)	Create an instance of StoredProcedureQuery for executing a stored procedure in the database.
Query	createNativeQuery(String sqlString)	Create an instance of Query for executing a native SQL query.
Query	createNativeQuery(String sqlString, Class resultType)	This method is used to create a query using SQL.
Query	createNativeQuery(String sqlString, String resultSetMapping)	Create an instance of Query for executing a native SQL query.
Query	createQuery(CriteriaDelete deleteQuery)
<T> TypedQuery<T>	createQuery(CriteriaQuery<T> criteriaQuery)
Query	createQuery(CriteriaUpdate updateQuery)
Query	createQuery(String jpqlString)	Create an instance of Query for executing an JPQL query.
<T> TypedQuery<T>	createQuery(String qlString, Class<T> resultClass)	Create an instance of TypedQuery for executing a Java Persistence query language statement.
Query	createQuery(Expression expression, Class<?> resultType)	This method is used to create a query using a EclipseLink Expression and the return type.
Query	createQuery(Call call)	This method is used to create a query using a EclipseLink Call.
Query	createQuery(Call call, Class<?> entityClass)	This method is used to create a query using a EclipseLink Call.
Query	createQuery(DatabaseQuery databaseQuery)	This method is used to create a query using a EclipseLink DatabaseQuery.
Query	createQueryByExample(Object exampleObject)	This method is used to create a query using a EclipseLink by example.
protected DatabaseQuery	createQueryInternal(Expression expression, Class<?> resultType)	This method is used to create a query using a EclipseLink Expression and the return type.
StoredProcedureQuery	createStoredProcedureQuery(String procedureName)	Create an instance of StoredProcedureQuery for executing a stored procedure in the database.
StoredProcedureQuery	createStoredProcedureQuery(String procedureName, Class... resultClasses)	Create an instance of StoredProcedureQuery for executing a stored procedure in the database.
StoredProcedureQuery	createStoredProcedureQuery(String procedureName, String... resultSetMappings)	Create an instance of StoredProcedureQuery for executing a stored procedure in the database.
void	detach(Object entity)	Remove the given entity from the persistence context, causing a managed entity to become detached.
protected void	detectTransactionWrapper()
<T> T	find(Class<T> entityClass, Object primaryKey)	Find by primary key.
<T> T	find(Class<T> entityClass, Object primaryKey, LockModeType lockMode)	Find by primary key and lock.
<T> T	find(Class<T> entityClass, Object primaryKey, LockModeType lockMode, Map<String,Object> properties)	Find by primary key and lock.
<T> T	find(Class<T> entityClass, Object primaryKey, Map<String,Object> properties)	Find by primary key, using the specified properties.
Object	find(String entityName, Object primaryKey)	Find by primary key.
protected Object	findInternal(ClassDescriptor descriptor, AbstractSession session, Object id, LockModeType lockMode, Map<String,Object> properties)	Find by primary key.
void	flush()	Synchronize the persistence context with the underlying database.
AbstractSession	getAbstractSession()	Return the underlying database session
RepeatableWriteUnitOfWork	getActivePersistenceContext(Object txn)
Session	getActiveSession()	This method returns the current session to the requestor.
AbstractSession	getActiveSessionIfExists()	This method returns the current session to the requestor.
CriteriaBuilder	getCriteriaBuilder()	Return an instance of CriteriaBuilder for the creation of Criteria API Query objects.
DatabaseSessionImpl	getDatabaseSession()	Return the underlying database session
Object	getDelegate()	Return the underlying provider object for the EntityManager, if available.
EntityGraph	getEntityGraph(String graphName)
<T> List<EntityGraph<? super T>>	getEntityGraphs(Class<T> entityClass)
EntityManagerFactory	getEntityManagerFactory()	Return the entity manager factory for the entity manager.
FlushModeType	getFlushMode()	Get the flush mode that applies to all objects contained in the persistence context.
LockModeType	getLockMode(Object entity)
DatabaseSessionImpl	getMemberDatabaseSession(Class<?> cls)	Return the member DatabaseSessionImpl that maps cls in session broker.
ServerSession	getMemberServerSession(Class<?> cls)	Return the member ServerSession that maps cls in session broker.
String	getMemberSessionName(Class<?> cls)	Return the name of member session that maps cls.
Metamodel	getMetamodel()	Return an instance of Metamodel interface for access to the metamodel of the persistence unit.
protected Map<QueryImpl,QueryImpl>	getOpenQueriesMap()	Return the weak reference to the open queries.
protected Set<QueryImpl>	getOpenQueriesSet()	Return the weak reference to the open queries.
Map<String,Object>	getProperties()	Get the properties and associated values that are in effect for the entity manager.
protected String	getPropertiesHandlerProperty(String name)	Get the local EntityManager property from the properties Map.
protected static String	getPropertiesHandlerProperty(String name, String value)	Verifies and (if required) translates the value.
Object	getProperty(String name)	The method search for user defined property passed in from EntityManager, if it is not found then search for it from EntityManagerFactory properties.
protected HashMap<String,Object>	getQueryHints(Object entity, EntityManagerImpl.OperationType operation)	Before any find or refresh operation, gather any persistence unit properties that should be applied to the query.
protected ReadObjectQuery	getReadObjectQuery(Class<?> referenceClass, Object primaryKey, Map properties)	Build a selection query for the primary key values.
protected ReadObjectQuery	getReadObjectQuery(Object entity, Map properties)	Build a selection query for the given entity.
protected ReadObjectQuery	getReadObjectQuery(Map properties)	Build a selection query using the given properties.
Session	getReadOnlySession()	Return a read-only session (client session) for read-only operations.
<T> T	getReference(Class<T> entityClass, Object primaryKey)	Get an instance, whose state may be lazily fetched.
ServerSession	getServerSession()	Return the underlying server session, throws ClassCastException if it's not a ServerSession.
Session	getSession()	This method will return a Session outside of a transaction and null within a transaction.
SessionBroker	getSessionBroker()	Return the underlying session broker, throws ClassCastException if it's not a SessionBroker.
Set<String>	getSupportedProperties()	Get the names of the properties that are supported for use with the entity manager.
SynchronizationType	getSyncType()	INTERNAL: Tracks if this EntityManager should automatically associate with the transaction or not
EntityTransaction	getTransaction()	Returns the resource-level transaction object.
UnitOfWork	getUnitOfWork()	This method will return the active UnitOfWork
boolean	hasActivePersistenceContext()	This method is used in contains to check if we already have a persistence context.
protected void	initialize(Map properties)	Initialize the state after construction.
boolean	isBroker()	Indicates whether the underlying session is a session broker.
boolean	isFlushModeAUTO()	Internal method.
boolean	isJoinedToTransaction()
boolean	isOpen()	Indicates whether or not this entity manager and its entity manager factory are open.
protected static boolean	isPropertyToBeAdded(String value)	Property value is to be added if it's non null and not an empty string.
protected static boolean	isPropertyToBeAdded(DataSource ds, String dsName)
protected static boolean	isPropertyToBeRemoved(String value)	Property value of an empty string indicates that the existing property should be removed.
protected static Boolean	isPropertyValueToBeUpdated(String oldValue, String newValue)
void	joinTransaction()	Indicate to the EntityManager that a JTA transaction is active.
void	load(Object entityOrEntities, AttributeGroup group)	This method will load the passed entity or collection of entities using the passed AttributeGroup.
void	lock(Object entity, LockModeType lockMode)	Set the lock mode for an entity object contained in the persistence context.
void	lock(Object entity, LockModeType lockMode, Map<String,Object> properties)	Set the lock mode for an entity object contained in the persistence context.
<T> T	merge(T entity)	Merge the state of the given entity into the current persistence context, using the unqualified class name as the entity name.
protected Object	mergeInternal(Object entity)	Merge the state of the given entity into the current persistence context, using the unqualified class name as the entity name.
void	persist(Object entity)	If in a transaction this method will check for existence and register the object if it is new.
protected void	processProperties()	Process the local EntityManager properties only.
static void	processUnfetchedAttribute(FetchGroupTracker entity, String attributeName)	INTERNAL: Load/fetch the unfetched object.
static void	processUnfetchedAttributeForSet(FetchGroupTracker entity, String attributeName)	INTERNAL: Load/fetch the unfetched object.
void	refresh(Object entity)	Refresh the state of the instance from the database.
void	refresh(Object entity, LockModeType lockMode)	Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type.
void	refresh(Object entity, LockModeType lockMode, Map<String,Object> properties)	Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type.
void	refresh(Object entity, Map<String,Object> properties)	Refresh the state of the instance from the database, using the specified properties, and overwriting changes made to the entity, if any.
void	remove(Object entity)	Remove the instance.
void	removeExtendedPersistenceContext()	Internal method called by EntityTransactionImpl class in case of transaction rollback.
void	setAbstractSession(AbstractSession session)	INTERNAL: Set the underlying database session
protected void	setEntityTransactionWrapper()
void	setFlushMode(FlushModeType flushMode)	Set the flush mode that applies to all objects contained in the persistence context.
protected void	setJTATransactionWrapper()
void	setProperties(Map properties)	Use this method to set properties into existing EntityManager that are normally passed to createEntityManager method.
void	setProperty(String propertyName, Object value)
protected void	setRollbackOnly()	Internal method.
boolean	shouldBeginEarlyTransaction()	Indicate the early transaction should be forced to start.
boolean	shouldFlushBeforeQuery()
<T> T	unwrap(Class<T> cls)	Return an object of the specified type to allow access to the provider-specific API.
void	verifyOpen()
void	verifyOpenWithSetRollbackOnly()	used to save having to constantly use a try/catch to call setRollbackOnly

Methods inherited from class java.lang.Object

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

Field Details

isOpen

protected boolean isOpen

Store if this entity manager has been closed.

extendedPersistenceContext

protected RepeatableWriteUnitOfWork extendedPersistenceContext

Stores the UnitOfWork representing the persistence context.

readOnlySession

protected AbstractSession readOnlySession

Stores a session used for read-only queries.

databaseSession

protected AbstractSession databaseSession

References the DatabaseSession that this deployment is using.

factory

protected EntityManagerFactoryDelegate factory

References to the parent factory that has created this entity manager. Ensures that the factory is not garbage collected.

beginEarlyTransaction

protected boolean beginEarlyTransaction

Join existing transaction property, allows reading through write connection.

properties

protected Map<String,Object> properties

Local properties passed from createEntityManager.

flushMode

protected FlushModeType flushMode

Flush mode property, allows flush before query to be avoided.

referenceMode

protected ReferenceMode referenceMode

Reference mode property, allows weak unit of work references to allow garbage collection during a transaction.

connectionPolicy

protected ConnectionPolicy connectionPolicy

Connection policy used to create ClientSession, allows using a different pool/connection/exclusive connections. Not used in SessionBroker case (composite persistence unit case).

connectionPolicies

protected Map<String,ConnectionPolicy> connectionPolicies

In case of composite persistence unit this map is used instead of connectionPolicy attribute. Member sessions' ConnectionPolicies keyed by sessions' names (composite members' persistence unit names). Used only in SessionBroker case (composite persistence unit case): in that case guaranteed to be always non null.

openQueriesMap

protected WeakHashMap<QueryImpl,QueryImpl> openQueriesMap

Keep a list of openQueries that are executed in this entity manager.

closeOnCommit

protected boolean closeOnCommit

Property to avoid resuming unit of work if going to be closed on commit anyway.

persistOnCommit

protected boolean persistOnCommit

Property to avoid discover new objects in unit of work if application always uses persist.

cacheStoreBypass

protected boolean cacheStoreBypass

Property to avoid writing to the cache on commit (merge)

flushClearCache

protected String flushClearCache

The FlashClearCache mode to be used. Relevant only in case call to flush method followed by call to clear method.

See Also:

• FlushClearCache

shouldValidateExistence

protected boolean shouldValidateExistence

Determine if does-exist should be performed on persist.

commitOrder

protected UnitOfWork.CommitOrderType commitOrder

Allow updates to be ordered by id to avoid possible deadlocks.

commitWithoutPersistRules

protected boolean commitWithoutPersistRules

syncType

protected SynchronizationType syncType

Tracks if this EntityManager should automatically associate with the transaction or not

Constructor Details

EntityManagerImpl

public EntityManagerImpl(String sessionName)

Constructor returns an EntityManager assigned to the a particular DatabaseSession.

Parameters:

sessionName - the DatabaseSession name that should be used. This constructor can potentially throw EclipseLink exceptions regarding the existence, or errors with the specified session.

EntityManagerImpl

public EntityManagerImpl(AbstractSession databaseSession,
 SynchronizationType syncType)

Constructor called from the EntityManagerFactory to create an EntityManager

Parameters:

databaseSession - the databaseSession assigned to this deployment.

EntityManagerImpl

public EntityManagerImpl(AbstractSession databaseSession,
 Map properties,
 SynchronizationType syncType)

Constructor called from the EntityManagerFactory to create an EntityManager

Parameters:

databaseSession - the databaseSession assigned to this deployment. Note: The properties argument is provided to allow properties to be passed into this EntityManager, but there are currently no such properties implemented

EntityManagerImpl

public EntityManagerImpl(EntityManagerFactoryDelegate factory,
 Map properties,
 SynchronizationType syncType)

Constructor called from the EntityManagerFactory to create an EntityManager

Parameters:

factory - the EntityMangerFactoryImpl that created this entity manager. Note: The properties argument is provided to allow properties to be passed into this EntityManager, but there are currently no such properties implemented

Method Details

getOpenQueriesMap

protected Map<QueryImpl,QueryImpl> getOpenQueriesMap()

Return the weak reference to the open queries.

getOpenQueriesSet

protected Set<QueryImpl> getOpenQueriesSet()

Return the weak reference to the open queries.

addOpenQuery

public void addOpenQuery(QueryImpl query)

Queries that leave the connection and are executed against this entity manager will be added here. On rollback or commit any left over open queries should be closed.

initialize

protected void initialize(Map properties)

Initialize the state after construction.

clear

public void clear()

Clear the persistence context, causing all managed entities to become detached. Changes made to entities that have not been flushed to the database will not be persisted.

Specified by:

clear in interface EntityManager

removeExtendedPersistenceContext

public void removeExtendedPersistenceContext()

Internal method called by EntityTransactionImpl class in case of transaction rollback. The caller is responsible for releasing extendedPersistenceContext and it's parent.

persist

public void persist(Object entity)

If in a transaction this method will check for existence and register the object if it is new. The instance of the entity provided will become managed.

Specified by:

persist in interface EntityManager

Throws:

IllegalArgumentException - if the given Object is not an entity.

merge

public <T> T merge(T entity)

Merge the state of the given entity into the current persistence context, using the unqualified class name as the entity name.

Specified by:

merge in interface EntityManager

Returns:

the instance that the state was merged to

mergeInternal

protected Object mergeInternal(Object entity)

Merge the state of the given entity into the current persistence context, using the unqualified class name as the entity name.

Returns:

the instance that the state was merged to

Throws:

IllegalArgumentException - if given Object is not an entity or is a removed entity

remove

public void remove(Object entity)

Remove the instance.

Specified by:

remove in interface EntityManager

Throws:

IllegalArgumentException - if Object passed in is not an entity

find

public <T> T find(Class<T> entityClass,
 Object primaryKey)

Find by primary key.

Specified by:

find in interface EntityManager

Parameters:

entityClass - - the entity class to find.

primaryKey - - the entity primary key value, or primary key class, or a List of primary key values.

Returns:

the found entity instance or null if the entity does not exist

Throws:

IllegalArgumentException - if the first argument does not denote an entity type or the second argument is not a valid type for that entity's primary key.

find

public <T> T find(Class<T> entityClass,
 Object primaryKey,
 Map<String,Object> properties)

Find by primary key, using the specified properties. Search for an entity of the specified class and primary key. If the entity instance is contained in the persistence context it is returned from there. If a vendor-specific property or hint is not recognized, it is silently ignored.

Specified by:

find in interface EntityManager

Parameters:

properties - standard and vendor-specific properties

Returns:

the found entity instance or null if the entity does not exist

Throws:

IllegalArgumentException - if the first argument does not denote an entity type or the second argument is is not a valid type for that entity's primary key or is null

Since:

Java Persistence API 2.0

find

public <T> T find(Class<T> entityClass,
 Object primaryKey,
 LockModeType lockMode)

Find by primary key and lock. Search for an entity of the specified class and primary key and lock it with respect to the specified lock type. If the entity instance is contained in the persistence context it is returned from there. If the entity is found within the persistence context and the lock mode type is pessimistic and the entity has a version attribute, the persistence provider must perform optimistic version checks when obtaining the database lock. If these checks fail, the OptimisticLockException will be thrown. If the lock mode type is pessimistic and the entity instance is found but cannot be locked: - the PessimisticLockException will be thrown if the database locking failure causes transaction-level rollback. - the LockTimeoutException will be thrown if the database locking failure causes only statement-level rollback

Specified by:

find in interface EntityManager

Returns:

the found entity instance or null if the entity does not exist

Throws:

IllegalArgumentException - if the first argument does not denote an entity type or the second argument is not a valid type for that entity's primary key or is null

TransactionRequiredException - if there is no transaction and a lock mode other than NONE is set

OptimisticLockException - if the optimistic version check fails

PessimisticLockException - if pessimistic locking fails and the transaction is rolled back

LockTimeoutException - if pessimistic locking fails and only the statement is rolled back

PersistenceException - if an unsupported lock call is made

find

public <T> T find(Class<T> entityClass,
 Object primaryKey,
 LockModeType lockMode,
 Map<String,Object> properties)

Find by primary key and lock. Search for an entity of the specified class and primary key and lock it with respect to the specified lock type. If the entity instance is contained in the persistence context it is returned from there. If the entity is found within the persistence context and the lock mode type is pessimistic and the entity has a version attribute, the persistence provider must perform optimistic version checks when obtaining the database lock. If these checks fail, the OptimisticLockException will be thrown. If the lock mode type is pessimistic and the entity instance is found but cannot be locked: - the PessimisticLockException will be thrown if the database locking failure causes transaction-level rollback. - the LockTimeoutException will be thrown if the database locking failure causes only statement-level rollback If a vendor-specific property or hint is not recognized, it is silently ignored. Portable applications should not rely on the standard timeout hint. Depending on the database in use and the locking mechanisms used by the provider, the hint may or may not be observed.

Specified by:

find in interface EntityManager

Parameters:

properties - standard and vendor-specific properties and hints

Returns:

the found entity instance or null if the entity does not exist

Throws:

IllegalArgumentException - if the first argument does not denote an entity type or the second argument is not a valid type for that entity's primary key or is null

TransactionRequiredException - if there is no transaction and a lock mode other than NONE is set

OptimisticLockException - if the optimistic version check fails

PessimisticLockException - if pessimistic locking fails and the transaction is rolled back

LockTimeoutException - if pessimistic locking fails and only the statement is rolled back

PersistenceException - if an unsupported lock call is made

find

public Object find(String entityName,
 Object primaryKey)

Find by primary key.

Parameters:

entityName - - the entity class to find.

primaryKey - - the entity primary key value, or primary key class, or a List of primary key values.

Returns:

the found entity instance or null, if the entity does not exist.

Throws:

IllegalArgumentException - if the first argument does not indicate an entity or if the second argument is not a valid type for that entity's primaryKey.

findInternal

protected Object findInternal(ClassDescriptor descriptor,
 AbstractSession session,
 Object id,
 LockModeType lockMode,
 Map<String,Object> properties)

Find by primary key.

Parameters:

descriptor - - the entity class to find.

id - - the entity primary key value, or primary key class, or a List of primary key values.

Returns:

the found entity instance or null, if the entity does not exist.

Throws:

IllegalArgumentException - if the first argument does not denote an entity type or the second argument is not a valid type for that entity's primary key.

flush

public void flush()

Synchronize the persistence context with the underlying database.

Specified by:

flush in interface EntityManager

detectTransactionWrapper

protected void detectTransactionWrapper()

refresh

public void refresh(Object entity)

Refresh the state of the instance from the database.

Specified by:

refresh in interface EntityManager

Parameters:

entity - instance registered in the current persistence context.

refresh

public void refresh(Object entity,
 Map<String,Object> properties)

Refresh the state of the instance from the database, using the specified properties, and overwriting changes made to the entity, if any. If a vendor-specific property or hint is not recognized, it is silently ignored.

Specified by:

refresh in interface EntityManager

Parameters:

properties - standard and vendor-specific properties

Throws:

IllegalArgumentException - if the instance is not an entity or the entity is not managed

TransactionRequiredException - if invoked on a container-managed entity manager of type PersistenceContextType.TRANSACTION and there is no transaction.

EntityNotFoundException - if the entity no longer exists in the database

Since:

Java Persistence API 2.0

refresh

public void refresh(Object entity,
 LockModeType lockMode)

Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type. If the lock mode type is pessimistic and the entity instance is found but cannot be locked: - the PessimisticLockException will be thrown if the database locking failure causes transaction-level rollback. - the LockTimeoutException will be thrown if the database locking failure causes only statement-level rollback.

Specified by:

refresh in interface EntityManager

Throws:

IllegalArgumentException - if the instance is not an entity or the entity is not managed

TransactionRequiredException - if there is no transaction

EntityNotFoundException - if the entity no longer exists in the database

PessimisticLockException - if pessimistic locking fails and the transaction is rolled back

LockTimeoutException - if pessimistic locking fails and only the statement is rolled back

PersistenceException - if an unsupported lock call is made

refresh

public void refresh(Object entity,
 LockModeType lockMode,
 Map<String,Object> properties)

Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type. If the lock mode type is pessimistic and the entity instance is found but cannot be locked: - the PessimisticLockException will be thrown if the database locking failure causes transaction-level rollback. - the LockTimeoutException will be thrown if the database locking failure causes only statement-level rollback If a vendor-specific property or hint is not recognized, it is silently ignored. Portable applications should not rely on the standard timeout hint. Depending on the database in use and the locking mechanisms used by the provider, the hint may or may not be observed.

Specified by:

refresh in interface EntityManager

Parameters:

properties - standard and vendor-specific properties and hints

Throws:

IllegalArgumentException - if the instance is not an entity or the entity is not managed

TransactionRequiredException - if there is no transaction

EntityNotFoundException - if the entity no longer exists in the database

PessimisticLockException - if pessimistic locking fails and the transaction is rolled back

LockTimeoutException - if pessimistic locking fails and only the statement is rolled back

PersistenceException - if an unsupported lock call is made

contains

public boolean contains(Object entity)

Check if the instance belongs to the current persistence context.

Specified by:

contains in interface EntityManager

Throws:

IllegalArgumentException - if given Object is not an entity

contains

protected boolean contains(Object entity,
 UnitOfWork uow)

Check if the instance belongs to the current persistence context.

createDescriptorNamedQuery

public Query createDescriptorNamedQuery(String queryName,
 Class<?> descriptorClass)

Description copied from interface: JpaEntityManager

This method will create a query object that wraps a EclipseLink Named Query.

Specified by:

createDescriptorNamedQuery in interface JpaEntityManager

createDescriptorNamedQuery

public Query createDescriptorNamedQuery(String queryName,
 Class<?> descriptorClass,
 List argumentTypes)

Description copied from interface: JpaEntityManager

This method will create a query object that wraps a EclipseLink Named Query.

Specified by:

createDescriptorNamedQuery in interface JpaEntityManager

createNamedQuery

public Query createNamedQuery(String name)

Create an instance of Query for executing a named query (in EJBQL or native SQL).

Specified by:

createNamedQuery in interface EntityManager

Parameters:

name - the name of a query defined in metadata

Returns:

the new query instance

createNamedQuery

public <T> TypedQuery<T> createNamedQuery(String name,
 Class<T> resultClass)

Create an instance of TypedQuery for executing a named query (in the Java Persistence query language or in native SQL).

Specified by:

createNamedQuery in interface EntityManager

Parameters:

name - the name of a query defined in metadata

resultClass - the type of the query result

Returns:

the new query instance

Throws:

IllegalArgumentException - if a query has not been defined with the given name or if the query string is found to be invalid

createNamedStoredProcedureQuery

public StoredProcedureQuery createNamedStoredProcedureQuery(String name)

Create an instance of StoredProcedureQuery for executing a stored procedure in the database.

Specified by:

createNamedStoredProcedureQuery in interface EntityManager

Parameters:

name - name assigned to the stored procedure query in metadata

Returns:

the new stored procedure query instance

Throws:

IllegalArgumentException - if a query has not been defined with the given name

createNativeQuery

public Query createNativeQuery(String sqlString)

Create an instance of Query for executing a native SQL query.

Specified by:

createNativeQuery in interface EntityManager

Parameters:

sqlString - a native SQL query string

Returns:

the new query instance

createNativeQuery

public Query createNativeQuery(String sqlString,
 Class resultType)

This method is used to create a query using SQL. The class, must be the expected return type.

Specified by:

createNativeQuery in interface EntityManager

createNativeQuery

public Query createNativeQuery(String sqlString,
 String resultSetMapping)

Create an instance of Query for executing a native SQL query.

Specified by:

createNativeQuery in interface EntityManager

Parameters:

sqlString - a native SQL query string

resultSetMapping - the name of the result set mapping

Returns:

the new query instance

Throws:

IllegalArgumentException - if query string is not valid

getActiveSession

public Session getActiveSession()

This method returns the current session to the requestor. The current session will be a the active UnitOfWork within a transaction and will be a 'scrap' UnitOfWork outside of a transaction. The caller is concerned about the results then the getSession() or getUnitOfWork() API should be called.

Specified by:

getActiveSession in interface JpaEntityManager

getActiveSessionIfExists

public AbstractSession getActiveSessionIfExists()

This method returns the current session to the requestor. The current session will be a the active UnitOfWork within a transaction and will be a 'scrap' UnitOfWork outside of a transaction. The caller is concerned about the results then the getSession() or getUnitOfWork() API should be called.

getDelegate

public Object getDelegate()

Return the underlying provider object for the EntityManager, if available. The result of this method is implementation specific.

Specified by:

getDelegate in interface EntityManager

getFlushMode

public FlushModeType getFlushMode()

Get the flush mode that applies to all objects contained in the persistence context.

Specified by:

getFlushMode in interface EntityManager

Returns:

flushMode

getUnitOfWork

public UnitOfWork getUnitOfWork()

This method will return the active UnitOfWork

Specified by:

getUnitOfWork in interface JpaEntityManager

getSession

public Session getSession()

This method will return a Session outside of a transaction and null within a transaction.

Specified by:

getSession in interface JpaEntityManager

getTransaction

public EntityTransaction getTransaction()

Returns the resource-level transaction object. The EntityTransaction instance may be used serially to begin and commit multiple transactions.

Specified by:

getTransaction in interface EntityManager

Returns:

EntityTransaction instance

Throws:

IllegalStateException - if invoked on a JTA EntityManager.

getProperty

public Object getProperty(String name)

The method search for user defined property passed in from EntityManager, if it is not found then search for it from EntityManagerFactory properties.

getReadObjectQuery

protected ReadObjectQuery getReadObjectQuery(Class<?> referenceClass,
 Object primaryKey,
 Map properties)

Build a selection query for the primary key values.

getReadObjectQuery

protected ReadObjectQuery getReadObjectQuery(Map properties)

Build a selection query using the given properties.

getReadObjectQuery

protected ReadObjectQuery getReadObjectQuery(Object entity,
 Map properties)

Build a selection query for the given entity.

getReference

public <T> T getReference(Class<T> entityClass,
 Object primaryKey)

Get an instance, whose state may be lazily fetched. If the requested instance does not exist in the database, throws EntityNotFoundException when the instance state is first accessed. (The container is permitted to throw EntityNotFoundException when get is called.) The application should not expect that the instance state will be available upon detachment, unless it was accessed by the application while the entity manager was open.

Specified by:

getReference in interface EntityManager

Returns:

the found entity instance.

Throws:

IllegalArgumentException - if the first argument does not denote an entity type or the second argument is not a valid type for that entity's primary key.

EntityNotFoundException - if the entity state cannot be accessed.

getReadOnlySession

public Session getReadOnlySession()

Return a read-only session (client session) for read-only operations.

getDatabaseSession

public DatabaseSessionImpl getDatabaseSession()

Return the underlying database session

Specified by:

getDatabaseSession in interface JpaEntityManager

getAbstractSession

public AbstractSession getAbstractSession()

Return the underlying database session

Specified by:

getAbstractSession in interface JpaEntityManager

setAbstractSession

public void setAbstractSession(AbstractSession session)

INTERNAL: Set the underlying database session

getServerSession

public ServerSession getServerSession()

Return the underlying server session, throws ClassCastException if it's not a ServerSession.

Specified by:

getServerSession in interface JpaEntityManager

getSessionBroker

public SessionBroker getSessionBroker()

Return the underlying session broker, throws ClassCastException if it's not a SessionBroker.

Specified by:

getSessionBroker in interface JpaEntityManager

getMemberDatabaseSession

public DatabaseSessionImpl getMemberDatabaseSession(Class<?> cls)

Return the member DatabaseSessionImpl that maps cls in session broker. Return null if either not a session broker or cls is not mapped. Session broker implement composite persistence unit.

Specified by:

getMemberDatabaseSession in interface JpaEntityManager

getMemberServerSession

public ServerSession getMemberServerSession(Class<?> cls)

Return the member ServerSession that maps cls in session broker. Return null if either not a session broker or cls is not mapped. Session broker implement composite persistence unit.

Specified by:

getMemberServerSession in interface JpaEntityManager

getMemberSessionName

public String getMemberSessionName(Class<?> cls)

Return the name of member session that maps cls. Return null if either not a session broker or cls is not mapped. Session broker implement composite persistence unit.

Specified by:

getMemberSessionName in interface JpaEntityManager

createQuery

public Query createQuery(Expression expression,
 Class<?> resultType)

This method is used to create a query using a EclipseLink Expression and the return type.

Specified by:

createQuery in interface JpaEntityManager

createQuery

public Query createQuery(DatabaseQuery databaseQuery)

This method is used to create a query using a EclipseLink DatabaseQuery.

Specified by:

createQuery in interface JpaEntityManager

createQuery

public <T> TypedQuery<T> createQuery(CriteriaQuery<T> criteriaQuery)

Specified by:

createQuery in interface EntityManager

Since:

Java Persistence 2.0

See Also:

• EntityManager.createQuery(jakarta.persistence.criteria.CriteriaQuery)

createQueryByExample

public Query createQueryByExample(Object exampleObject)

This method is used to create a query using a EclipseLink by example.

Specified by:

createQueryByExample in interface JpaEntityManager

createQuery

public Query createQuery(Call call)

This method is used to create a query using a EclipseLink Call.

Specified by:

createQuery in interface JpaEntityManager

createQuery

public Query createQuery(Call call,
 Class<?> entityClass)

This method is used to create a query using a EclipseLink Call.

Specified by:

createQuery in interface JpaEntityManager

createQuery

public Query createQuery(String jpqlString)

Create an instance of Query for executing an JPQL query.

Specified by:

createQuery in interface EntityManager

Parameters:

jpqlString - an JPQL query string

Returns:

the new query instance

createQuery

public <T> TypedQuery<T> createQuery(String qlString,
 Class<T> resultClass)

Create an instance of TypedQuery for executing a Java Persistence query language statement.

Specified by:

createQuery in interface EntityManager

Parameters:

qlString - a Java Persistence query string

resultClass - the type of the query result

Returns:

the new query instance

Throws:

IllegalArgumentException - if the query string is found to be invalid

createQueryInternal

protected DatabaseQuery createQueryInternal(Expression expression,
 Class<?> resultType)

This method is used to create a query using a EclipseLink Expression and the return type.

createStoredProcedureQuery

public StoredProcedureQuery createStoredProcedureQuery(String procedureName)

Create an instance of StoredProcedureQuery for executing a stored procedure in the database.

Parameters must be registered before the stored procedure can be executed.

If the stored procedure returns one or more result sets, any result set will be returned as a list of type Object[].

Specified by:

createStoredProcedureQuery in interface EntityManager

Parameters:

procedureName - name of the stored procedure in the database

Returns:

the new stored procedure query instance

Throws:

IllegalArgumentException - if a stored procedure of the given name does not exist (or the query execution will fail)

Since:

EclipseLink 2.5/Java Persistence 2.1

createStoredProcedureQuery

public StoredProcedureQuery createStoredProcedureQuery(String procedureName,
 Class... resultClasses)

Create an instance of StoredProcedureQuery for executing a stored procedure in the database.

Parameters must be registered before the stored procedure can be executed.

The resultClass arguments must be specified in the order in which the result sets will be returned by the stored procedure invocation.

Specified by:

createStoredProcedureQuery in interface EntityManager

Parameters:

procedureName - name of the stored procedure in the database

resultClasses - classes to which the result sets produced by the stored procedure are to be mapped

Returns:

the new stored procedure query instance

Throws:

IllegalArgumentException - if a stored procedure of the given name does not exist (or the query execution will fail)

Since:

EclipseLink 2.5/Java Persistence 2.1

createStoredProcedureQuery

public StoredProcedureQuery createStoredProcedureQuery(String procedureName,
 String... resultSetMappings)

Create an instance of StoredProcedureQuery for executing a stored procedure in the database.

Parameters must be registered before the stored procedure can be executed.

The resultSetMapping arguments must be specified in the order in which the result sets will be returned by the stored procedure invocation.

Specified by:

createStoredProcedureQuery in interface EntityManager

Parameters:

procedureName - name of the stored procedure in the database

resultSetMappings - the names of the result set mappings to be used in mapping result sets returned by the stored procedure

Returns:

the new stored procedure query instance

Throws:

IllegalArgumentException - if a stored procedure or result set mapping of the given name does not exist (or the query execution will fail)

Since:

EclipseLink 2.5/Java Persistence 2.1

close

public void close()

Closes this EntityManager.

After invoking this method, all methods on the instance will throw an IllegalStateException except for isOpen, which will return false .

This should be called when a method is finished with the EntityManager in a bean-managed transaction environment or when executed outside a container. Closing of the EntityManager is handled by the container when using container-managed transactions.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface EntityManager

closeOpenQueries

protected void closeOpenQueries()

Close any open queries executed against this entity manager.0

isFlushModeAUTO

public boolean isFlushModeAUTO()

Internal method. Indicates whether flushMode is AUTO.

Returns:

boolean

isOpen

public boolean isOpen()

Indicates whether or not this entity manager and its entity manager factory are open. Returns true until a call to close() is made.

Specified by:

isOpen in interface EntityManager

lock

public void lock(Object entity,
 LockModeType lockMode)

Set the lock mode for an entity object contained in the persistence context.

Specified by:

lock in interface EntityManager

Throws:

PersistenceException - if an unsupported lock call is made

IllegalArgumentException - if the instance is not an entity or is a detached entity

TransactionRequiredException - if there is no transaction

lock

public void lock(Object entity,
 LockModeType lockMode,
 Map<String,Object> properties)

Set the lock mode for an entity object contained in the persistence context.

Specified by:

lock in interface EntityManager

Throws:

PersistenceException - if an unsupported lock call is made

IllegalArgumentException - if the instance is not an entity or is a detached entity

TransactionRequiredException - if there is no transaction

verifyOpen

public void verifyOpen()

verifyOpenWithSetRollbackOnly

public void verifyOpenWithSetRollbackOnly()

used to save having to constantly use a try/catch to call setRollbackOnly

getActivePersistenceContext

public RepeatableWriteUnitOfWork getActivePersistenceContext(Object txn)

setProperties

public void setProperties(Map properties)

Use this method to set properties into existing EntityManager that are normally passed to createEntityManager method. Note that if the method called when active persistence context already exists then properties used to create persistence context will be ignored until the new persistence context is created (that happens either after transaction rolled back or after clear method was called).

setProperty

public void setProperty(String propertyName,
 Object value)

Specified by:

setProperty in interface EntityManager

See Also:

• EntityManager.setProperty(java.lang.String, java.lang.Object)

hasActivePersistenceContext

public boolean hasActivePersistenceContext()

This method is used in contains to check if we already have a persistence context. If there is no active persistence context the method returns false

checkForTransaction

protected Object checkForTransaction(boolean validateExistence)

Return the current, joined transaction object. If validateExistence is true throw an error if there is no joined transaction, otherwise return null.

shouldFlushBeforeQuery

public boolean shouldFlushBeforeQuery()

shouldBeginEarlyTransaction

public boolean shouldBeginEarlyTransaction()

Indicate the early transaction should be forced to start. This allows for reading through the write connection. As a side effect, this will also prevent anything from being cached.

joinTransaction

public void joinTransaction()

Indicate to the EntityManager that a JTA transaction is active. This method should be called on a JTA application managed EntityManager that was created outside the scope of the active transaction to associate it with the current JTA transaction.

Specified by:

joinTransaction in interface EntityManager

Throws:

TransactionRequiredException - if there is no transaction.

setRollbackOnly

protected void setRollbackOnly()

Internal method. Sets transaction to rollback only.

processProperties

protected void processProperties()

Process the local EntityManager properties only. The persistence unit properties are processed by the factory.

getPropertiesHandlerProperty

protected String getPropertiesHandlerProperty(String name)

Get the local EntityManager property from the properties Map. This only searches the local Map. The persistence unit properties are processed by the EntityManagerFactory.

getPropertiesHandlerProperty

protected static String getPropertiesHandlerProperty(String name,
 String value)

Verifies and (if required) translates the value.

setEntityTransactionWrapper

protected void setEntityTransactionWrapper()

setFlushMode

public void setFlushMode(FlushModeType flushMode)

Set the flush mode that applies to all objects contained in the persistence context.

Specified by:

setFlushMode in interface EntityManager

setJTATransactionWrapper

protected void setJTATransactionWrapper()

createConnectionPolicy

protected void createConnectionPolicy()

Create connection policy using properties. Default connection policy created if no connection properties specified. Should be called only in case this.databaseSession is a ServerSession.

createConnectionPolicies

protected void createConnectionPolicies(Map mapOfProperties)

Create connection policy using properties. Default connection policy created if no connection properties specified. Should be called only in case this.databaseSession is a SessionBroker.

createConnectionPolicy

protected static ConnectionPolicy createConnectionPolicy(ServerSession serverSession,
 Map properties)

Create connection policy using properties. Default connection policy created if no connection properties specified.

isBroker

public boolean isBroker()

Indicates whether the underlying session is a session broker. Session broker implement composite persistence unit.

Specified by:

isBroker in interface JpaEntityManager

isPropertyToBeAdded

protected static boolean isPropertyToBeAdded(String value)

Property value is to be added if it's non null and not an empty string.

isPropertyToBeAdded

protected static boolean isPropertyToBeAdded(DataSource ds,
 String dsName)

isPropertyToBeRemoved

protected static boolean isPropertyToBeRemoved(String value)

Property value of an empty string indicates that the existing property should be removed.

isPropertyValueToBeUpdated

protected static Boolean isPropertyValueToBeUpdated(String oldValue,
 String newValue)

Returns:

null: no change; TRUE: substitute oldValue by newValue; FALSE: remove oldValue

detach

public void detach(Object entity)

Remove the given entity from the persistence context, causing a managed entity to become detached. Unflushed changes made to the entity if any (including removal of the entity), will not be synchronized to the database. Entities which previously referenced the detached entity will continue to reference it.

Specified by:

detach in interface EntityManager

Throws:

IllegalArgumentException - if the instance is not an entity

Since:

Java Persistence 2.0

getCriteriaBuilder

public CriteriaBuilder getCriteriaBuilder()

Return an instance of CriteriaBuilder for the creation of Criteria API Query objects.

Specified by:

getCriteriaBuilder in interface EntityManager

Returns:

CriteriaBuilder instance

Throws:

IllegalStateException - if the entity manager has been closed.

Since:

Java Persistence 2.0

See Also:

• EntityManager.getCriteriaBuilder()

getQueryHints

protected HashMap<String,Object> getQueryHints(Object entity,
 EntityManagerImpl.OperationType operation)

Before any find or refresh operation, gather any persistence unit properties that should be applied to the query.

getMetamodel

public Metamodel getMetamodel()

Return an instance of Metamodel interface for access to the metamodel of the persistence unit.

Specified by:

getMetamodel in interface EntityManager

Returns:

Metamodel instance

Throws:

IllegalStateException - if the entity manager has been closed.

Since:

Java Persistence 2.0

See Also:

• EntityManager.getMetamodel()

getEntityManagerFactory

public EntityManagerFactory getEntityManagerFactory()

Return the entity manager factory for the entity manager.

Specified by:

getEntityManagerFactory in interface EntityManager

Returns:

EntityManagerFactory instance

Throws:

IllegalStateException - if the entity manager has been closed.

Since:

Java Persistence API 2.0

getLockMode

public LockModeType getLockMode(Object entity)

Specified by:

getLockMode in interface EntityManager

Since:

Java Persistence API 2.0

See Also:

• EntityManager.getLockMode(java.lang.Object)

getProperties

public Map<String,Object> getProperties()

Get the properties and associated values that are in effect for the entity manager. Changing the contents of the map does not change the configuration in effect.

Specified by:

getProperties in interface EntityManager

Since:

Java Persistence API 2.0

getSupportedProperties

public Set<String> getSupportedProperties()

Get the names of the properties that are supported for use with the entity manager. These correspond to properties and hints that may be passed to the methods of the EntityManager interface that take a properties argument or used with the PersistenceContext annotation. These properties include all standard entity manager hints and properties as well as vendor-specific ones supported by the provider. These properties may or may not currently be in effect.

Returns:

property names

Since:

Java Persistence API 2.0

unwrap

public <T> T unwrap(Class<T> cls)

Return an object of the specified type to allow access to the provider-specific API. If the provider's EntityManager implementation does not support the specified class, the PersistenceException is thrown.

Specified by:

unwrap in interface EntityManager

Parameters:

cls - the class of the object to be returned. This is normally either the underlying EntityManager implementation class or an interface that it implements.

Returns:

an instance of the specified class

Throws:

PersistenceException - if the provider does not support the call.

Since:

Java Persistence API 2.0

load

public void load(Object entityOrEntities,
 AttributeGroup group)

This method will load the passed entity or collection of entities using the passed AttributeGroup. In case of collection all members should be either entities of the same type or have a common inheritance hierarchy mapped root class. The AttributeGroup should correspond to the entity type.

Specified by:

load in interface JpaEntityManager

copy

public Object copy(Object entityOrEntities,
 AttributeGroup group)

This method will return copy the passed entity using the passed AttributeGroup. In case of collection all members should be either entities of the same type or have a common inheritance hierarchy mapped root class. The AttributeGroup should correspond to the entity type.

Specified by:

copy in interface JpaEntityManager

processUnfetchedAttribute

public static void processUnfetchedAttribute(FetchGroupTracker entity,
 String attributeName)

INTERNAL: Load/fetch the unfetched object. This method is used by the ClassWaver..

processUnfetchedAttributeForSet

public static void processUnfetchedAttributeForSet(FetchGroupTracker entity,
 String attributeName)

INTERNAL: Load/fetch the unfetched object. This method is used by the ClassWeaver.

createQuery

public Query createQuery(CriteriaUpdate updateQuery)

Specified by:

createQuery in interface EntityManager

createQuery

public Query createQuery(CriteriaDelete deleteQuery)

Specified by:

createQuery in interface EntityManager

isJoinedToTransaction

public boolean isJoinedToTransaction()

Specified by:

isJoinedToTransaction in interface EntityManager

createEntityGraph

public <T> EntityGraph<T> createEntityGraph(Class<T> rootType)

Specified by:

createEntityGraph in interface EntityManager

createEntityGraph

public EntityGraph createEntityGraph(String graphName)

Specified by:

createEntityGraph in interface EntityManager

getEntityGraph

public EntityGraph getEntityGraph(String graphName)

Specified by:

getEntityGraph in interface EntityManager

getEntityGraphs

public <T> List<EntityGraph<? super T>> getEntityGraphs(Class<T> entityClass)

Specified by:

getEntityGraphs in interface EntityManager

getSyncType

public SynchronizationType getSyncType()

INTERNAL: Tracks if this EntityManager should automatically associate with the transaction or not

Returns:

the syncType