org.hibernate.engine.spi

Interface PersistenceContext

All Known Implementing Classes:

StatefulPersistenceContext

public interface PersistenceContext

Represents the state of "stuff" Hibernate is tracking, including (not exhaustive):

• entities
• collections
• snapshots
• proxies

Often referred to as the "first level cache".

Author:

Gavin King, Steve Ebersole

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	PersistenceContext.NaturalIdHelper Provides centralized access to natural-id-related functionality.

Field Summary

Fields

Modifier and Type	Field and Description
static Object	NO_ROW Marker object used to indicate (via reference checking) that no row was returned.

Method Summary

Modifier and Type	Method and Description
void	addChildParent(Object child, Object parent) Add a child/parent relation to cache for cascading op
void	addCollectionHolder(PersistentCollection holder) Register a PersistentCollection object for an array.
void	addEntity(EntityKey key, Object entity) Add a canonical mapping from entity key to entity instance
void	addEntity(EntityUniqueKey euk, Object entity) Add an entity to the cache by unique key
EntityEntry	addEntity(Object entity, Status status, Object[] loadedState, EntityKey entityKey, Object version, LockMode lockMode, boolean existsInDatabase, EntityPersister persister, boolean disableVersionIncrement) Adds an entity to the internal caches.
EntityEntry	addEntry(Object entity, Status status, Object[] loadedState, Object rowId, Serializable id, Object version, LockMode lockMode, boolean existsInDatabase, EntityPersister persister, boolean disableVersionIncrement) Generates an appropriate EntityEntry instance and adds it to the event source's internal caches.
CollectionEntry	addInitializedCollection(CollectionPersister persister, PersistentCollection collection, Serializable id) add a collection we just pulled out of the cache (does not need initializing)
void	addInitializedDetachedCollection(CollectionPersister collectionPersister, PersistentCollection collection) add an (initialized) collection that was created by another session and passed into update() (ie.
void	addNewCollection(CollectionPersister persister, PersistentCollection collection) Add a new collection (ie.
void	addNonLazyCollection(PersistentCollection collection) Register a collection for non-lazy loading at the end of the two-phase load
void	addNullProperty(EntityKey ownerKey, String propertyName) Record the fact that the association belonging to the keyed entity is null.
void	addProxy(EntityKey key, Object proxy) Add a proxy to the session cache
void	addUninitializedCollection(CollectionPersister persister, PersistentCollection collection, Serializable id) add a collection we just loaded up (still needs initializing)
void	addUninitializedDetachedCollection(CollectionPersister persister, PersistentCollection collection) add a detached uninitialized collection
void	addUnownedCollection(CollectionKey key, PersistentCollection collection) Add a collection which has no owner loaded
void	afterLoad() Call this after finishing a two-phase load
void	afterTransactionCompletion() Called after transactions end
void	beforeLoad() Call this before begining a two-phase load
void	checkUniqueness(EntityKey key, Object object) Attempts to check whether the given key represents an entity already loaded within the current session.
void	clear() Clear the state of the persistence context
boolean	containsCollection(PersistentCollection collection) Is the given collection associated with this persistence context?
boolean	containsEntity(EntityKey key) Is there an entity with the given key in the persistence context
boolean	containsProxy(Object proxy) Is the given proxy associated with this persistence context?
int	decrementCascadeLevel() Called after cascading
BatchFetchQueue	getBatchFetchQueue() Get the BatchFetchQueue, instantiating one if necessary.
Object[]	getCachedDatabaseSnapshot(EntityKey key) Retrieve the cached database snapshot for the requested entity key.
int	getCascadeLevel() How deep are we cascaded?
PersistentCollection	getCollection(CollectionKey collectionKey) Get the collection instance associated with the CollectionKey
Map	getCollectionEntries() Get the mapping from collection instance to collection entry
CollectionEntry	getCollectionEntry(PersistentCollection coll) Get the collection entry for a persistent collection
CollectionEntry	getCollectionEntryOrNull(Object collection) Get the collection entry for a collection passed to filter, which might be a collection wrapper, an array, or an unwrapped collection.
PersistentCollection	getCollectionHolder(Object array) Get the PersistentCollection object for an array
Object	getCollectionOwner(Serializable key, CollectionPersister collectionPersister) Get the entity that owns this persistent collection
Map	getCollectionsByKey() Get the mapping from collection key to collection instance
Object[]	getDatabaseSnapshot(Serializable id, EntityPersister persister) Get the current state of the entity as known to the underlying database, or null if there is no corresponding row
Map	getEntitiesByKey() Get the mapping from key value to entity instance
Object	getEntity(EntityKey key) Get the entity instance associated with the given key
Object	getEntity(EntityUniqueKey euk) Get an entity cached by unique key
Map	getEntityEntries() Deprecated. Due to the introduction of EntityEntryContext and bytecode enhancement; only valid really for sizing, see getNumberOfManagedEntities(). For iterating the entity/EntityEntry combos, see reentrantSafeEntityEntries()
EntityEntry	getEntry(Object entity) Retrieve the EntityEntry representation of the given entity.
Object	getIndexInOwner(String entity, String property, Object childObject, Map mergeMap) Search the persistence context for an index of the child object, given a collection role
LoadContexts	getLoadContexts() Retrieve this persistence context's managed load context.
Serializable	getLoadedCollectionOwnerIdOrNull(PersistentCollection collection) Get the ID for the entity that owned this persistent collection when it was loaded
Object	getLoadedCollectionOwnerOrNull(PersistentCollection collection) Get the entity that owned this persistent collection when it was loaded
PersistenceContext.NaturalIdHelper	getNaturalIdHelper() Access to the natural-id helper for this persistence context
Object[]	getNaturalIdSnapshot(Serializable id, EntityPersister persister) Get the values of the natural id fields as known to the underlying database, or null if the entity has no natural id or there is no corresponding row.
HashSet	getNullifiableEntityKeys() Retrieve the set of EntityKeys representing nullifiable references
int	getNumberOfManagedEntities()
Serializable	getOwnerId(String entityName, String propertyName, Object childEntity, Map mergeMap) Search this persistence context for an associated entity instance which is considered the "owner" of the given childEntity, and return that owner's id value.
Object	getProxy(EntityKey key) Get an existing proxy by key
SessionImplementor	getSession() Get the session to which this persistence context is bound.
Serializable	getSnapshot(PersistentCollection coll) Get the snapshot of the pre-flush collection state
boolean	hasNonReadOnlyEntities()
int	incrementCascadeLevel() Called before cascading
void	initializeNonLazyCollections() Force initialization of all non-lazy collections encountered during the current two-phase load (actually, this is a no-op, unless this is the "outermost" load)
boolean	isDefaultReadOnly() Will entities and proxies that are loaded into this persistence context be made read-only by default? To determine the read-only/modifiable setting for a particular entity or proxy:
boolean	isEntryFor(Object entity) Is there an EntityEntry registration for this entity instance?
boolean	isFlushing() Is a flush cycle currently in process?
boolean	isLoadFinished() Is in a two-phase load?
boolean	isPropertyNull(EntityKey ownerKey, String propertyName) Is the association property belonging to the keyed entity null?
boolean	isReadOnly(Object entityOrProxy) Is the entity or proxy read-only? To determine the default read-only/modifiable setting used for entities and proxies that are loaded into the session use Session.isDefaultReadOnly()
boolean	isStateless()
Object	narrowProxy(Object proxy, EntityPersister persister, EntityKey key, Object object) If the existing proxy is insufficiently "narrow" (derived), instantiate a new proxy and overwrite the registration of the old one.
Object	proxyFor(EntityPersister persister, EntityKey key, Object impl) Return the existing proxy associated with the given EntityKey, or the third argument (the entity associated with the key) if no proxy exists.
Object	proxyFor(Object impl) Return the existing proxy associated with the given EntityKey, or the argument (the entity associated with the key) if no proxy exists.
boolean	reassociateIfUninitializedProxy(Object value) Takes the given object and, if it represents a proxy, reassociates it with this event source.
void	reassociateProxy(Object value, Serializable id) If a deleted entity instance is re-saved, and it has a proxy, we need to reset the identifier of the proxy
Map.Entry<Object,EntityEntry>[]	reentrantSafeEntityEntries() Provides access to the entity/EntityEntry combos associated with the persistence context in a manner that is safe from reentrant access.
void	registerInsertedKey(EntityPersister persister, Serializable id) Register keys inserted during the current transaction
void	removeChildParent(Object child) Remove child/parent relation from cache
PersistentCollection	removeCollectionHolder(Object array) Remove the mapping of collection to holder during eviction of the owning entity
Object	removeEntity(EntityKey key) Remove an entity.
EntityEntry	removeEntry(Object entity) Remove an entity entry from the session cache
Object	removeProxy(EntityKey key) Remove a proxy from the session cache.
void	replaceDelayedEntityIdentityInsertKeys(EntityKey oldKey, Serializable generatedId)
void	setDefaultReadOnly(boolean readOnly) Change the default for entities and proxies loaded into this persistence context from modifiable to read-only mode, or from modifiable to read-only mode.
void	setEntryStatus(EntityEntry entry, Status status) Set the status of an entry
void	setFlushing(boolean flushing) Called before and after the flushcycle
void	setReadOnly(Object entityOrProxy, boolean readOnly) Set an unmodified persistent object to read-only mode, or a read-only object to modifiable mode.
String	toString() Returns a string representation of the object.
Object	unproxy(Object maybeProxy) Get the entity instance underlying the given proxy, throwing an exception if the proxy is uninitialized.
Object	unproxyAndReassociate(Object maybeProxy) Possibly unproxy the given reference and reassociate it with the current session.
PersistentCollection	useUnownedCollection(CollectionKey key) Take ownership of a previously unowned collection, if one.
boolean	wasInsertedDuringTransaction(EntityPersister persister, Serializable id) Allows callers to check to see if the identified entity was inserted during the current transaction.

Field Detail

NO_ROW

static final Object NO_ROW

Marker object used to indicate (via reference checking) that no row was returned.

Method Detail

isStateless

boolean isStateless()

getSession

SessionImplementor getSession()

Get the session to which this persistence context is bound.

Returns:

The session.

getLoadContexts

LoadContexts getLoadContexts()

Retrieve this persistence context's managed load context.

Returns:

The load context

addUnownedCollection

void addUnownedCollection(CollectionKey key,
                          PersistentCollection collection)

Add a collection which has no owner loaded

Parameters:

key - The collection key under which to add the collection

collection - The collection to add

useUnownedCollection

PersistentCollection useUnownedCollection(CollectionKey key)

Take ownership of a previously unowned collection, if one. This method returns null if no such collection was previous added () or was previously removed.

This should indicate the owner is being loaded and we are ready to "link" them.

Parameters:

key - The collection key for which to locate a collection collection

Returns:

The unowned collection, or null

getBatchFetchQueue

BatchFetchQueue getBatchFetchQueue()

Get the BatchFetchQueue, instantiating one if necessary.

Returns:

The batch fetch queue in effect for this persistence context

clear

void clear()

Clear the state of the persistence context

hasNonReadOnlyEntities

boolean hasNonReadOnlyEntities()

Returns:

false if we know for certain that all the entities are read-only

setEntryStatus

void setEntryStatus(EntityEntry entry,
                    Status status)

Set the status of an entry

Parameters:

entry - The entry for which to set the status

status - The new status

afterTransactionCompletion

void afterTransactionCompletion()

Called after transactions end

getDatabaseSnapshot

Object[] getDatabaseSnapshot(Serializable id,
                             EntityPersister persister)

Get the current state of the entity as known to the underlying database, or null if there is no corresponding row

Parameters:

id - The identifier of the entity for which to grab a snapshot

persister - The persister of the entity.

Returns:

The entity's (non-cached) snapshot

See Also:

getCachedDatabaseSnapshot(org.hibernate.engine.spi.EntityKey)

getCachedDatabaseSnapshot

Object[] getCachedDatabaseSnapshot(EntityKey key)

Retrieve the cached database snapshot for the requested entity key.

This differs from getDatabaseSnapshot(java.io.Serializable, org.hibernate.persister.entity.EntityPersister) is two important respects:

1. no snapshot is obtained from the database if not already cached
2. an entry of NO_ROW here is interpretet as an exception

Parameters:

key - The entity key for which to retrieve the cached snapshot

Returns:

The cached snapshot

Throws:

IllegalStateException - if the cached snapshot was == NO_ROW.

getNaturalIdSnapshot

Object[] getNaturalIdSnapshot(Serializable id,
                              EntityPersister persister)

Get the values of the natural id fields as known to the underlying database, or null if the entity has no natural id or there is no corresponding row.

Parameters:

id - The identifier of the entity for which to grab a snapshot

persister - The persister of the entity.

Returns:

The current (non-cached) snapshot of the entity's natural id state.

addEntity

void addEntity(EntityKey key,
               Object entity)

Add a canonical mapping from entity key to entity instance

Parameters:

key - The key under which to add an entity

entity - The entity instance to add

getEntity

Object getEntity(EntityKey key)

Get the entity instance associated with the given key

Parameters:

key - The key under which to look for an entity

Returns:

The matching entity, or null

containsEntity

boolean containsEntity(EntityKey key)

Is there an entity with the given key in the persistence context

Parameters:

key - The key under which to look for an entity

Returns:

true indicates an entity was found; otherwise false

removeEntity

Object removeEntity(EntityKey key)

Remove an entity. Also clears up all other state associated with the entity aside from the EntityEntry

Parameters:

key - The key whose matching entity should be removed

Returns:

The matching entity

addEntity

void addEntity(EntityUniqueKey euk,
               Object entity)

Add an entity to the cache by unique key

Parameters:

euk - The unique (non-primary) key under which to add an entity

entity - The entity instance

getEntity

Object getEntity(EntityUniqueKey euk)

Get an entity cached by unique key

Parameters:

euk - The unique (non-primary) key under which to look for an entity

Returns:

The located entity

getEntry

EntityEntry getEntry(Object entity)

Retrieve the EntityEntry representation of the given entity.

Parameters:

entity - The entity instance for which to locate the corresponding entry

Returns:

The entry

removeEntry

EntityEntry removeEntry(Object entity)

Remove an entity entry from the session cache

Parameters:

entity - The entity instance for which to remove the corresponding entry

Returns:

The matching entry

isEntryFor

boolean isEntryFor(Object entity)

Is there an EntityEntry registration for this entity instance?

Parameters:

entity - The entity instance for which to check for an entry

Returns:

true indicates a matching entry was found.

getCollectionEntry

CollectionEntry getCollectionEntry(PersistentCollection coll)

Get the collection entry for a persistent collection

Parameters:

coll - The persistent collection instance for which to locate the collection entry

Returns:

The matching collection entry

addEntity

EntityEntry addEntity(Object entity,
                      Status status,
                      Object[] loadedState,
                      EntityKey entityKey,
                      Object version,
                      LockMode lockMode,
                      boolean existsInDatabase,
                      EntityPersister persister,
                      boolean disableVersionIncrement)

Adds an entity to the internal caches.

addEntry

EntityEntry addEntry(Object entity,
                     Status status,
                     Object[] loadedState,
                     Object rowId,
                     Serializable id,
                     Object version,
                     LockMode lockMode,
                     boolean existsInDatabase,
                     EntityPersister persister,
                     boolean disableVersionIncrement)

Generates an appropriate EntityEntry instance and adds it to the event source's internal caches.

containsCollection

boolean containsCollection(PersistentCollection collection)

Is the given collection associated with this persistence context?

containsProxy

boolean containsProxy(Object proxy)

Is the given proxy associated with this persistence context?

reassociateIfUninitializedProxy

boolean reassociateIfUninitializedProxy(Object value)
                                 throws MappingException

Takes the given object and, if it represents a proxy, reassociates it with this event source.

Parameters:

value - The possible proxy to be reassociated.

Returns:

Whether the passed value represented an actual proxy which got initialized.

Throws:

MappingException

reassociateProxy

void reassociateProxy(Object value,
                      Serializable id)
               throws MappingException

If a deleted entity instance is re-saved, and it has a proxy, we need to reset the identifier of the proxy

Throws:

MappingException

unproxy

Object unproxy(Object maybeProxy)
        throws HibernateException

Get the entity instance underlying the given proxy, throwing an exception if the proxy is uninitialized. If the given object is not a proxy, simply return the argument.

Throws:

HibernateException

unproxyAndReassociate

Object unproxyAndReassociate(Object maybeProxy)
                      throws HibernateException

Possibly unproxy the given reference and reassociate it with the current session.

Parameters:

maybeProxy - The reference to be unproxied if it currently represents a proxy.

Returns:

The unproxied instance.

Throws:

HibernateException

checkUniqueness

void checkUniqueness(EntityKey key,
                     Object object)
              throws HibernateException

Attempts to check whether the given key represents an entity already loaded within the current session.

Parameters:

object - The entity reference against which to perform the uniqueness check.

Throws:

HibernateException

narrowProxy

Object narrowProxy(Object proxy,
                   EntityPersister persister,
                   EntityKey key,
                   Object object)
            throws HibernateException

If the existing proxy is insufficiently "narrow" (derived), instantiate a new proxy and overwrite the registration of the old one. This breaks == and occurs only for "class" proxies rather than "interface" proxies. Also init the proxy to point to the given target implementation if necessary.

Parameters:

proxy - The proxy instance to be narrowed.

persister - The persister for the proxied entity.

key - The internal cache key for the proxied entity.

object - (optional) the actual proxied entity instance.

Returns:

An appropriately narrowed instance.

Throws:

HibernateException

proxyFor

Object proxyFor(EntityPersister persister,
                EntityKey key,
                Object impl)
         throws HibernateException

Return the existing proxy associated with the given EntityKey, or the third argument (the entity associated with the key) if no proxy exists. Init the proxy to the target implementation, if necessary.

Throws:

HibernateException

proxyFor

Object proxyFor(Object impl)
         throws HibernateException

Return the existing proxy associated with the given EntityKey, or the argument (the entity associated with the key) if no proxy exists. (slower than the form above)

Throws:

HibernateException

getCollectionOwner

Object getCollectionOwner(Serializable key,
                          CollectionPersister collectionPersister)
                   throws MappingException

Get the entity that owns this persistent collection

Throws:

MappingException

getLoadedCollectionOwnerOrNull

Object getLoadedCollectionOwnerOrNull(PersistentCollection collection)

Get the entity that owned this persistent collection when it was loaded

Parameters:

collection - The persistent collection

Returns:

the owner if its entity ID is available from the collection's loaded key and the owner entity is in the persistence context; otherwise, returns null

getLoadedCollectionOwnerIdOrNull

Serializable getLoadedCollectionOwnerIdOrNull(PersistentCollection collection)

Get the ID for the entity that owned this persistent collection when it was loaded

Parameters:

collection - The persistent collection

Returns:

the owner ID if available from the collection's loaded key; otherwise, returns null

addUninitializedCollection

void addUninitializedCollection(CollectionPersister persister,
                                PersistentCollection collection,
                                Serializable id)

add a collection we just loaded up (still needs initializing)

addUninitializedDetachedCollection

void addUninitializedDetachedCollection(CollectionPersister persister,
                                        PersistentCollection collection)

add a detached uninitialized collection

addNewCollection

void addNewCollection(CollectionPersister persister,
                      PersistentCollection collection)
               throws HibernateException

Add a new collection (ie. a newly created one, just instantiated by the application, with no database state or snapshot)

Parameters:

collection - The collection to be associated with the persistence context

Throws:

HibernateException

addInitializedDetachedCollection

void addInitializedDetachedCollection(CollectionPersister collectionPersister,
                                      PersistentCollection collection)
                               throws HibernateException

add an (initialized) collection that was created by another session and passed into update() (ie. one with a snapshot and existing state on the database)

Throws:

HibernateException

addInitializedCollection

CollectionEntry addInitializedCollection(CollectionPersister persister,
                                         PersistentCollection collection,
                                         Serializable id)
                                  throws HibernateException

add a collection we just pulled out of the cache (does not need initializing)

Throws:

HibernateException

getCollection

PersistentCollection getCollection(CollectionKey collectionKey)

Get the collection instance associated with the CollectionKey

addNonLazyCollection

void addNonLazyCollection(PersistentCollection collection)

Register a collection for non-lazy loading at the end of the two-phase load

initializeNonLazyCollections

void initializeNonLazyCollections()
                           throws HibernateException

Force initialization of all non-lazy collections encountered during the current two-phase load (actually, this is a no-op, unless this is the "outermost" load)

Throws:

HibernateException

getCollectionHolder

PersistentCollection getCollectionHolder(Object array)

Get the PersistentCollection object for an array

addCollectionHolder

void addCollectionHolder(PersistentCollection holder)

Register a PersistentCollection object for an array. Associates a holder with an array - MUST be called after loading array, since the array instance is not created until endLoad().

removeCollectionHolder

PersistentCollection removeCollectionHolder(Object array)

Remove the mapping of collection to holder during eviction of the owning entity

getSnapshot

Serializable getSnapshot(PersistentCollection coll)

Get the snapshot of the pre-flush collection state

getCollectionEntryOrNull

CollectionEntry getCollectionEntryOrNull(Object collection)

Get the collection entry for a collection passed to filter, which might be a collection wrapper, an array, or an unwrapped collection. Return null if there is no entry.

getProxy

Object getProxy(EntityKey key)

Get an existing proxy by key

addProxy

void addProxy(EntityKey key,
              Object proxy)

Add a proxy to the session cache

removeProxy

Object removeProxy(EntityKey key)

Remove a proxy from the session cache.

Additionally, ensure that any load optimization references such as batch or subselect loading get cleaned up as well.

Parameters:

key - The key of the entity proxy to be removed

Returns:

The proxy reference.

getNullifiableEntityKeys

HashSet getNullifiableEntityKeys()

Retrieve the set of EntityKeys representing nullifiable references

getEntitiesByKey

Map getEntitiesByKey()

Get the mapping from key value to entity instance

reentrantSafeEntityEntries

Map.Entry<Object,EntityEntry>[] reentrantSafeEntityEntries()

Provides access to the entity/EntityEntry combos associated with the persistence context in a manner that is safe from reentrant access. Specifically, it is safe from additions/removals while iterating.

Returns:

getEntityEntries

@Deprecated
Map getEntityEntries()

Deprecated. Due to the introduction of EntityEntryContext and bytecode enhancement; only valid really for sizing, see getNumberOfManagedEntities(). For iterating the entity/EntityEntry combos, see reentrantSafeEntityEntries()

Get the mapping from entity instance to entity entry

getNumberOfManagedEntities

int getNumberOfManagedEntities()

getCollectionEntries

Map getCollectionEntries()

Get the mapping from collection instance to collection entry

getCollectionsByKey

Map getCollectionsByKey()

Get the mapping from collection key to collection instance

getCascadeLevel

int getCascadeLevel()

How deep are we cascaded?

incrementCascadeLevel

int incrementCascadeLevel()

Called before cascading

decrementCascadeLevel

int decrementCascadeLevel()

Called after cascading

isFlushing

boolean isFlushing()

Is a flush cycle currently in process?

setFlushing

void setFlushing(boolean flushing)

Called before and after the flushcycle

beforeLoad

void beforeLoad()

Call this before begining a two-phase load

afterLoad

void afterLoad()

Call this after finishing a two-phase load

isLoadFinished

boolean isLoadFinished()

Is in a two-phase load?

toString

String toString()

Returns a string representation of the object.

Overrides:

toString in class Object

Returns:

a string representation of the object.

getOwnerId

Serializable getOwnerId(String entityName,
                        String propertyName,
                        Object childEntity,
                        Map mergeMap)

Search this persistence context for an associated entity instance which is considered the "owner" of the given childEntity, and return that owner's id value. This is performed in the scenario of a uni-directional, non-inverse one-to-many collection (which means that the collection elements do not maintain a direct reference to the owner).

As such, the processing here is basically to loop over every entity currently associated with this persistence context and for those of the correct entity (sub) type to extract its collection role property value and see if the child is contained within that collection. If so, we have found the owner; if not, we go on.

Also need to account for mergeMap which acts as a local copy cache managed for the duration of a merge operation. It represents a map of the detached entity instances pointing to the corresponding managed instance.

Parameters:

entityName - The entity name for the entity type which would own the child

propertyName - The name of the property on the owning entity type which would name this child association.

childEntity - The child entity instance for which to locate the owner instance id.

mergeMap - A map of non-persistent instances from an on-going merge operation (possibly null).

Returns:

The id of the entityName instance which is said to own the child; null if an appropriate owner not located.

getIndexInOwner

Object getIndexInOwner(String entity,
                       String property,
                       Object childObject,
                       Map mergeMap)

Search the persistence context for an index of the child object, given a collection role

addNullProperty

void addNullProperty(EntityKey ownerKey,
                     String propertyName)

Record the fact that the association belonging to the keyed entity is null.

isPropertyNull

boolean isPropertyNull(EntityKey ownerKey,
                       String propertyName)

Is the association property belonging to the keyed entity null?

isDefaultReadOnly

boolean isDefaultReadOnly()

Will entities and proxies that are loaded into this persistence context be made read-only by default? To determine the read-only/modifiable setting for a particular entity or proxy:

Returns:

true, loaded entities/proxies will be made read-only by default; false, loaded entities/proxies will be made modifiable by default.

See Also:

isReadOnly(Object), Session.isReadOnly(Object), Session.isDefaultReadOnly()

setDefaultReadOnly

void setDefaultReadOnly(boolean readOnly)

Change the default for entities and proxies loaded into this persistence context from modifiable to read-only mode, or from modifiable to read-only mode. Read-only entities are not dirty-checked and snapshots of persistent state are not maintained. Read-only entities can be modified, but changes are not persisted. When a proxy is initialized, the loaded entity will have the same read-only/modifiable setting as the uninitialized proxy has, regardless of the persistence context's current setting. To change the read-only/modifiable setting for a particular entity or proxy that is already in this session: + * @see PersistenceContext#setReadOnly(Object,boolean)

Parameters:

readOnly - true, the default for loaded entities/proxies is read-only; false, the default for loaded entities/proxies is modifiable

See Also:

To override this session's read-only/modifiable setting for entities and proxies loaded by a Query:, Query.setReadOnly(boolean), Session.setDefaultReadOnly(boolean)

isReadOnly

boolean isReadOnly(Object entityOrProxy)

Is the entity or proxy read-only?

To determine the default read-only/modifiable setting used for entities and proxies that are loaded into the session use Session.isDefaultReadOnly()

Parameters:

entityOrProxy - an entity or proxy

Returns:

true if the object is read-only; otherwise false to indicate that the object is modifiable.

setReadOnly

void setReadOnly(Object entityOrProxy,
                 boolean readOnly)

Set an unmodified persistent object to read-only mode, or a read-only object to modifiable mode. Read-only entities are not dirty-checked and snapshots of persistent state are not maintained. Read-only entities can be modified, but changes are not persisted. When a proxy is initialized, the loaded entity will have the same read-only/modifiable setting as the uninitialized proxy has, regardless of the session's current setting. If the entity or proxy already has the specified read-only/modifiable setting, then this method does nothing.

Parameters:

entityOrProxy - an entity or proxy

readOnly - if true, the entity or proxy is made read-only; otherwise, the entity or proxy is made modifiable.

See Also:

Session.setDefaultReadOnly(boolean), Session.setReadOnly(java.lang.Object, boolean), Query.setReadOnly(boolean)

replaceDelayedEntityIdentityInsertKeys

void replaceDelayedEntityIdentityInsertKeys(EntityKey oldKey,
                                            Serializable generatedId)

addChildParent

void addChildParent(Object child,
                    Object parent)

Add a child/parent relation to cache for cascading op

Parameters:

child - The child of the relationship

parent - The parent of the relationship

removeChildParent

void removeChildParent(Object child)

Remove child/parent relation from cache

Parameters:

child - The child to be removed.

registerInsertedKey

void registerInsertedKey(EntityPersister persister,
                         Serializable id)

Register keys inserted during the current transaction

Parameters:

persister - The entity persister

id - The id

wasInsertedDuringTransaction

boolean wasInsertedDuringTransaction(EntityPersister persister,
                                     Serializable id)

Allows callers to check to see if the identified entity was inserted during the current transaction.

Parameters:

persister - The entity persister

id - The id

Returns:

True if inserted during this transaction, false otherwise.

getNaturalIdHelper

PersistenceContext.NaturalIdHelper getNaturalIdHelper()

Access to the natural-id helper for this persistence context

Returns:

This persistence context's natural-id helper