PersistenceContext (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.engine
Interface PersistenceContext

All Known Implementing Classes:: StatefulPersistenceContext

public interface PersistenceContext

Holds the state of the persistence context, including the first-level cache, entries, snapshots, proxies, etc.

Author:: Gavin King

Method Summary

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, boolean lazyPropertiesAreUnfetched)
          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, boolean lazyPropertiesAreUnfetched)
          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)


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 EntityKey

Object getEntity(EntityUniqueKey euk)
          Get an entity cached by unique key

Map getEntityEntries()
          Get the mapping from entity instance to entity entry

EntityEntry getEntry(Object entity)
          Retreive 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.

Object[] getNaturalIdSnapshot(Serializable id, EntityPersister persister)


HashSet getNullifiableEntityKeys()
          Retrieve the set of EntityKeys representing nullifiable references

Serializable getOwnerId(String entity, String property, Object childObject, Map mergeMap)
          Search the persistence context for an owner for the child object, given a collection role

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 isEntryFor(Object entity)
          Is there an EntityEntry for this instance?

boolean isFlushing()
          Is a flush cycle currently in process?

boolean isPropertyNull(EntityKey ownerKey, String propertyName)
          Is the association property belonging to the keyed entity null?

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

PersistentCollection removeCollectionHolder(Object array)
          Remove the mapping of collection to holder during eviction of the owning entity

Object removeEntity(EntityKey key)
          Remove an entity from the session cache, also clear up other state associated with the entity, all except for the EntityEntry

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 setEntryStatus(EntityEntry entry, Status status)
          Set the status of an entry

void setFlushing(boolean flushing)
          Called before and after the flushcycle

void setReadOnly(Object entity, boolean readOnly)
          Set the object to read only and discard it's snapshot

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)
          Get and remove a collection whose owner is not yet loaded, when its owner is being loaded

Method Detail

isStateless

public boolean isStateless()

getSession

public SessionImplementor getSession()

Get the session to which this persistence context is bound.

Returns:: The session.

getLoadContexts

public LoadContexts getLoadContexts()

Retrieve this persistence context's managed load context.

Returns:: The load context

addUnownedCollection

public void addUnownedCollection(CollectionKey key,
                                 PersistentCollection collection)

Add a collection which has no owner loaded

useUnownedCollection

public PersistentCollection useUnownedCollection(CollectionKey key)

Get and remove a collection whose owner is not yet loaded, when its owner is being loaded

getBatchFetchQueue

public BatchFetchQueue getBatchFetchQueue()

Get the BatchFetchQueue, instantiating one if necessary.

clear

public void clear()

Clear the state of the persistence context

hasNonReadOnlyEntities

public boolean hasNonReadOnlyEntities()

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

setEntryStatus

public void setEntryStatus(EntityEntry entry,
                           Status status)

Set the status of an entry

afterTransactionCompletion

public void afterTransactionCompletion()

Called after transactions end

getDatabaseSnapshot

public Object[] getDatabaseSnapshot(Serializable id,
                                    EntityPersister persister)
                             throws HibernateException

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

Throws:: HibernateException

getCachedDatabaseSnapshot

public Object[] getCachedDatabaseSnapshot(EntityKey key)

getNaturalIdSnapshot

public Object[] getNaturalIdSnapshot(Serializable id,
                                     EntityPersister persister)
                              throws HibernateException

Throws:: HibernateException

addEntity

public void addEntity(EntityKey key,
                      Object entity)

Add a canonical mapping from entity key to entity instance

getEntity

public Object getEntity(EntityKey key)

Get the entity instance associated with the given EntityKey

containsEntity

public boolean containsEntity(EntityKey key)

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

removeEntity

public Object removeEntity(EntityKey key)

Remove an entity from the session cache, also clear up other state associated with the entity, all except for the EntityEntry

getEntity

public Object getEntity(EntityUniqueKey euk)

Get an entity cached by unique key

addEntity

public void addEntity(EntityUniqueKey euk,
                      Object entity)

Add an entity to the cache by unique key

getEntry

public EntityEntry getEntry(Object entity)

Retreive the EntityEntry representation of the given entity.

Parameters:: entity - The entity for which to locate the EntityEntry.
Returns:: The EntityEntry for the given entity.

removeEntry

public EntityEntry removeEntry(Object entity)

Remove an entity entry from the session cache

isEntryFor

public boolean isEntryFor(Object entity)

Is there an EntityEntry for this instance?

getCollectionEntry

public CollectionEntry getCollectionEntry(PersistentCollection coll)

Get the collection entry for a persistent collection

addEntity

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

Adds an entity to the internal caches.

addEntry

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

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

containsCollection

public boolean containsCollection(PersistentCollection collection)

Is the given collection associated with this persistence context?

containsProxy

public boolean containsProxy(Object proxy)

Is the given proxy associated with this persistence context?

reassociateIfUninitializedProxy

public 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

public 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

public 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

public 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

public 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

public 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

public 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

public 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

public Object getCollectionOwner(Serializable key,
                                 CollectionPersister collectionPersister)
                          throws MappingException

Get the entity that owns this persistent collection

Throws:: MappingException

addUninitializedCollection

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

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

addUninitializedDetachedCollection

public void addUninitializedDetachedCollection(CollectionPersister persister,
                                               PersistentCollection collection)

add a detached uninitialized collection

addNewCollection

public 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

public 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

public 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

public PersistentCollection getCollection(CollectionKey collectionKey)

Get the collection instance associated with the CollectionKey

addNonLazyCollection

public void addNonLazyCollection(PersistentCollection collection)

initializeNonLazyCollections

public 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

public PersistentCollection getCollectionHolder(Object array)

Get the PersistentCollection object for an array

addCollectionHolder

public 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

public PersistentCollection removeCollectionHolder(Object array)

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

getSnapshot

public Serializable getSnapshot(PersistentCollection coll)

Get the snapshot of the pre-flush collection state

getCollectionEntryOrNull

public 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

public Object getProxy(EntityKey key)

Get an existing proxy by key

addProxy

public void addProxy(EntityKey key,
                     Object proxy)

Add a proxy to the session cache

removeProxy

public Object removeProxy(EntityKey key)

Remove a proxy from the session cache

getNullifiableEntityKeys

public HashSet getNullifiableEntityKeys()

Retrieve the set of EntityKeys representing nullifiable references

getEntitiesByKey

public Map getEntitiesByKey()

Get the mapping from key value to entity instance

getEntityEntries

public Map getEntityEntries()

Get the mapping from entity instance to entity entry

getCollectionEntries

public Map getCollectionEntries()

Get the mapping from collection instance to collection entry

getCollectionsByKey

public Map getCollectionsByKey()

Get the mapping from collection key to collection instance

getCascadeLevel

public int getCascadeLevel()

How deep are we cascaded?

incrementCascadeLevel

public int incrementCascadeLevel()

Called before cascading

decrementCascadeLevel

public int decrementCascadeLevel()

Called after cascading

isFlushing

public boolean isFlushing()

Is a flush cycle currently in process?

setFlushing

public void setFlushing(boolean flushing)

Called before and after the flushcycle

beforeLoad

public void beforeLoad()

Call this before begining a two-phase load

afterLoad

public void afterLoad()

Call this after finishing a two-phase load

toString

public String toString()

Returns a string representation of the object.

Returns:: a string representation of the object.

getOwnerId

public Serializable getOwnerId(String entity,
                               String property,
                               Object childObject,
                               Map mergeMap)

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

getIndexInOwner

public 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

public void addNullProperty(EntityKey ownerKey,
                            String propertyName)

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

isPropertyNull

public boolean isPropertyNull(EntityKey ownerKey,
                              String propertyName)

Is the association property belonging to the keyed entity null?

setReadOnly

public void setReadOnly(Object entity,
                        boolean readOnly)

Set the object to read only and discard it's snapshot

replaceDelayedEntityIdentityInsertKeys

public void replaceDelayedEntityIdentityInsertKeys(EntityKey oldKey,
                                                   Serializable generatedId)

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Method Summary
`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, boolean lazyPropertiesAreUnfetched)` 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, boolean lazyPropertiesAreUnfetched)` 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)`
`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 `EntityKey`
`Object`	`getEntity(EntityUniqueKey euk)` Get an entity cached by unique key
`Map`	`getEntityEntries()` Get the mapping from entity instance to entity entry
`EntityEntry`	`getEntry(Object entity)` Retreive 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.
`Object[]`	`getNaturalIdSnapshot(Serializable id, EntityPersister persister)`
`HashSet`	`getNullifiableEntityKeys()` Retrieve the set of EntityKeys representing nullifiable references
`Serializable`	`getOwnerId(String entity, String property, Object childObject, Map mergeMap)` Search the persistence context for an owner for the child object, given a collection role
`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`	`isEntryFor(Object entity)` Is there an EntityEntry for this instance?
`boolean`	`isFlushing()` Is a flush cycle currently in process?
`boolean`	`isPropertyNull(EntityKey ownerKey, String propertyName)` Is the association property belonging to the keyed entity null?
`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
`PersistentCollection`	`removeCollectionHolder(Object array)` Remove the mapping of collection to holder during eviction of the owning entity
`Object`	`removeEntity(EntityKey key)` Remove an entity from the session cache, also clear up other state associated with the entity, all except for the `EntityEntry`
`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`	`setEntryStatus(EntityEntry entry, Status status)` Set the status of an entry
`void`	`setFlushing(boolean flushing)` Called before and after the flushcycle
`void`	`setReadOnly(Object entity, boolean readOnly)` Set the object to read only and discard it's snapshot
`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)` Get and remove a collection whose owner is not yet loaded, when its owner is being loaded

PersistenceContext (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

org.hibernate.engine Interface PersistenceContext

isStateless

getSession

getLoadContexts

addUnownedCollection

useUnownedCollection

getBatchFetchQueue

clear

hasNonReadOnlyEntities

setEntryStatus

afterTransactionCompletion

getDatabaseSnapshot

getCachedDatabaseSnapshot

getNaturalIdSnapshot

addEntity

getEntity

containsEntity

removeEntity

getEntity

addEntity

getEntry

removeEntry

isEntryFor

getCollectionEntry

addEntity

addEntry

containsCollection

containsProxy

reassociateIfUninitializedProxy

reassociateProxy

unproxy

unproxyAndReassociate

checkUniqueness

narrowProxy

proxyFor

proxyFor

getCollectionOwner

addUninitializedCollection

addUninitializedDetachedCollection

addNewCollection

addInitializedDetachedCollection

addInitializedCollection

getCollection

addNonLazyCollection

initializeNonLazyCollections

getCollectionHolder

addCollectionHolder

removeCollectionHolder

getSnapshot

getCollectionEntryOrNull

getProxy

addProxy

removeProxy

getNullifiableEntityKeys

getEntitiesByKey

getEntityEntries

getCollectionEntries

getCollectionsByKey

getCascadeLevel

incrementCascadeLevel

decrementCascadeLevel

isFlushing

setFlushing

beforeLoad

afterLoad

toString

getOwnerId

getIndexInOwner

addNullProperty

isPropertyNull

setReadOnly

replaceDelayedEntityIdentityInsertKeys

org.hibernate.engine
Interface PersistenceContext