Examples of org.hibernate.engine.PersistenceContext

org.hibernate.engine.PersistenceContext
Holds the state of the persistence context, including the first-level cache, entries, snapshots, proxies, etc. @author Gavin King

   * @return The collection
   */
  public Object getCollection(Serializable key, SessionImplementor session, Object owner) {


    CollectionPersister persister = getPersister( session );
    final PersistenceContext persistenceContext = session.getPersistenceContext();
    final EntityMode entityMode = session.getEntityMode();


    if (entityMode==EntityMode.DOM4J && !isEmbeddedInXML) {
      return UNFETCHED_COLLECTION;
    }
    
    // check if collection is currently being loaded
    PersistentCollection collection = persistenceContext.getLoadContexts().locateLoadingCollection( persister, key );
    
    if ( collection == null ) {
      
      // check if it is already completely loaded, but unowned
      collection = persistenceContext.useUnownedCollection( new CollectionKey(persister, key, entityMode) );
      
      if ( collection == null ) {
        // create a new collection wrapper, to be initialized later
        collection = instantiate( session, persister, key );
        collection.setOwner(owner);
  
        persistenceContext.addUninitializedCollection( persister, collection, key );
  
        // some collections are not lazy:
        if ( initializeImmediately( entityMode ) ) {
          session.initializeCollection( collection, false );
        }
        else if ( !persister.isLazy() ) {
          persistenceContext.addNonLazyCollection( collection );
        }
  
        if ( hasHolder( entityMode ) ) {
          session.getPersistenceContext().addCollectionHolder( collection );
        }

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   */
  public void onDelete(DeleteEvent event, Set transientEntities) throws HibernateException {


    final EventSource source = event.getSession();


    final PersistenceContext persistenceContext = source.getPersistenceContext();
    Object entity = persistenceContext.unproxyAndReassociate( event.getObject() );


    EntityEntry entityEntry = persistenceContext.getEntry( entity );
    final EntityPersister persister;
    final Serializable id;
    final Object version;


    if ( entityEntry == null ) {
      log.trace( "entity was not persistent in delete processing" );


      persister = source.getEntityPersister( event.getEntityName(), entity );


      if ( ForeignKeys.isTransient( persister.getEntityName(), entity, null, source ) ) {
        deleteTransientEntity( source, entity, event.isCascadeDeleteEnabled(), persister, transientEntities );
        // EARLY EXIT!!!
        return;
      }
      else {
        performDetachedEntityDeletionCheck( event );
      }


      id = persister.getIdentifier( entity, source.getEntityMode() );


      if ( id == null ) {
        throw new TransientObjectException(
            "the detached instance passed to delete() had a null identifier"
        );
      }


      EntityKey key = new EntityKey( id, persister, source.getEntityMode() );


      persistenceContext.checkUniqueness( key, entity );


      new OnUpdateVisitor( source, id, entity ).process( entity, persister );


      version = persister.getVersion( entity, source.getEntityMode() );


      entityEntry = persistenceContext.addEntity(
          entity,
          Status.MANAGED,
          persister.getPropertyValues( entity, source.getEntityMode() ),
          key,
          version,

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          "deleting " +
              MessageHelper.infoString( persister, entityEntry.getId(), session.getFactory() )
      );
    }


    final PersistenceContext persistenceContext = session.getPersistenceContext();
    final Type[] propTypes = persister.getPropertyTypes();
    final Object version = entityEntry.getVersion();


    final Object[] currentState;
    if ( entityEntry.getLoadedState() == null ) { //ie. the entity came in from update()
      currentState = persister.getPropertyValues( entity, session.getEntityMode() );
    }
    else {
      currentState = entityEntry.getLoadedState();
    }


    final Object[] deletedState = createDeletedState( persister, currentState, session );
    entityEntry.setDeletedState( deletedState );


    session.getInterceptor().onDelete(
        entity,
        entityEntry.getId(),
        deletedState,
        persister.getPropertyNames(),
        propTypes
    );


    // before any callbacks, etc, so subdeletions see that this deletion happened first
    persistenceContext.setEntryStatus( entityEntry, Status.DELETED );
    EntityKey key = new EntityKey( entityEntry.getId(), persister, session.getEntityMode() );


    cascadeBeforeDelete( session, persister, entity, entityEntry, transientEntities );


    new ForeignKeys.Nullifier( entity, true, false, session )
        .nullifyTransientReferences( entityEntry.getDeletedState(), propTypes );
    new Nullability( session ).checkNullability( entityEntry.getDeletedState(), persister, true );
    persistenceContext.getNullifiableEntityKeys().add( key );


    // Ensures that containing deletions happen before sub-deletions
    session.getActionQueue().addAction(
        new EntityDeleteAction(
            entityEntry.getId(),

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    if ( !persister.hasProxy() ) {
      // this class has no proxies (so do a shortcut)
      return load(event, persister, keyToLoad, options);
    }
    else {
      final PersistenceContext persistenceContext = event.getSession().getPersistenceContext();


      // look for a proxy
      Object proxy = persistenceContext.getProxy(keyToLoad);
      if ( proxy != null ) {
        return returnNarrowedProxy( event, persister, keyToLoad, options, persistenceContext, proxy );
      }
      else {
        if ( options.isAllowProxyCreation() ) {

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      );


    Object version = Versioning.getVersion( values, subclassPersister );
    if ( log.isTraceEnabled() ) log.trace( "Cached Version: " + version );


    final PersistenceContext persistenceContext = session.getPersistenceContext();
    persistenceContext.addEntry(
        result,
        Status.MANAGED,
        values,
        null,
        id,
        version,
        LockMode.NONE,
        true,
        subclassPersister,
        false,
        entry.areLazyPropertiesUnfetched()
      );
    subclassPersister.afterInitialize( result, entry.areLazyPropertiesUnfetched(), session );
    persistenceContext.initializeNonLazyCollections();
    // upgrade the lock if necessary:
    //lock(result, lockMode);


    //PostLoad is needed for EJB3
    //TODO: reuse the PostLoadEvent...

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    if ( !isSubselectLoadable() ) {
      return null;
    }
    
    final PersistenceContext persistenceContext = session.getPersistenceContext();
    
    SubselectFetch subselect = persistenceContext.getBatchFetchQueue()
      .getSubselect( new EntityKey( key, getOwnerEntityPersister(), session.getEntityMode() ) );
    
    if (subselect == null) {
      return null;
    }
    else {
      
      // Take care of any entities that might have
      // been evicted!  
      Iterator iter = subselect.getResult().iterator();
      while ( iter.hasNext() ) {
        if ( !persistenceContext.containsEntity( (EntityKey) iter.next() ) ) {
          iter.remove();
        }
      }  
      
      // Run a subquery loader

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    if ( !persister.hasProxy() ) {
      // this class has no proxies (so do a shortcut)
      return load(event, persister, keyToLoad, options);
    }
    else {
      final PersistenceContext persistenceContext = event.getSession().getPersistenceContext();


      // look for a proxy
      Object proxy = persistenceContext.getProxy(keyToLoad);
      if ( proxy != null ) {
        return returnNarrowedProxy( event, persister, keyToLoad, options, persistenceContext, proxy );
      }
      else {
        if ( options.isAllowProxyCreation() ) {

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      );


    Object version = Versioning.getVersion( values, subclassPersister );
    if ( log.isTraceEnabled() ) log.trace( "Cached Version: " + version );


    final PersistenceContext persistenceContext = session.getPersistenceContext();
    boolean isReadOnly = session.isDefaultReadOnly();
    if ( persister.isMutable() ) {
      Object proxy = persistenceContext.getProxy( entityKey );
      if ( proxy != null ) {
        // there is already a proxy for this impl
        // only set the status to read-only if the proxy is read-only
        isReadOnly = ( ( HibernateProxy ) proxy ).getHibernateLazyInitializer().isReadOnly();
      }
    }
    else {
      isReadOnly = true;
    }
    persistenceContext.addEntry(
        result,
        ( isReadOnly ? Status.READ_ONLY : Status.MANAGED ),
        values,
        null,
        id,
        version,
        LockMode.NONE,
        true,
        subclassPersister,
        false,
        entry.areLazyPropertiesUnfetched()
      );
    subclassPersister.afterInitialize( result, entry.areLazyPropertiesUnfetched(), session );
    persistenceContext.initializeNonLazyCollections();
    // upgrade the lock if necessary:
    //lock(result, lockMode);


    //PostLoad is needed for EJB3
    //TODO: reuse the PostLoadEvent...

View Full Code Here

   * @return The collection
   */
  public Object getCollection(Serializable key, SessionImplementor session, Object owner) {


    CollectionPersister persister = getPersister( session );
    final PersistenceContext persistenceContext = session.getPersistenceContext();
    final EntityMode entityMode = session.getEntityMode();


    if (entityMode==EntityMode.DOM4J && !isEmbeddedInXML) {
      return UNFETCHED_COLLECTION;
    }
    
    // check if collection is currently being loaded
    PersistentCollection collection = persistenceContext.getLoadContexts().locateLoadingCollection( persister, key );
    
    if ( collection == null ) {
      
      // check if it is already completely loaded, but unowned
      collection = persistenceContext.useUnownedCollection( new CollectionKey(persister, key, entityMode) );
      
      if ( collection == null ) {
        // create a new collection wrapper, to be initialized later
        collection = instantiate( session, persister, key );
        collection.setOwner(owner);
  
        persistenceContext.addUninitializedCollection( persister, collection, key );
  
        // some collections are not lazy:
        if ( initializeImmediately( entityMode ) ) {
          session.initializeCollection( collection, false );
        }
        else if ( !persister.isLazy() ) {
          persistenceContext.addNonLazyCollection( collection );
        }
  
        if ( hasHolder( entityMode ) ) {
          session.getPersistenceContext().addCollectionHolder( collection );
        }

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      return null;
    }
    else {
      CollectionPersister persister = session.getFactory().getCollectionPersister( collectionType.getRole() );


      final PersistenceContext persistenceContext = session.getPersistenceContext();
      //TODO: move into collection type, so we can use polymorphism!
      if ( collectionType.hasHolder( session.getEntityMode() ) ) {
        
        if (collection==CollectionType.UNFETCHED_COLLECTION) return null;


        PersistentCollection ah = persistenceContext.getCollectionHolder(collection);
        if (ah==null) {
          ah = collectionType.wrap(session, collection);
          persistenceContext.addNewCollection( persister, ah );
          persistenceContext.addCollectionHolder(ah);
        }
        return null;
      }
      else {


        PersistentCollection persistentCollection = collectionType.wrap(session, collection);
        persistenceContext.addNewCollection( persister, persistentCollection );


        if ( log.isTraceEnabled() ) log.trace( "Wrapped collection in role: " + collectionType.getRole() );


        return persistentCollection; //Force a substitution!

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Related Classes of org.hibernate.engine.PersistenceContext

org.hibernate.action.EntityDeleteAction

org.hibernate.action.internal.EntityDeleteAction

org.hibernate.event.def.AbstractFlushingEventListener

org.hibernate.event.def.DefaultDeleteEventListener

org.hibernate.event.def.DefaultEvictEventListener

org.hibernate.event.def.DefaultInitializeCollectionEventListener

org.hibernate.event.def.DefaultLoadEventListener

org.hibernate.event.def.WrapVisitor

org.hibernate.loader.Loader

org.hibernate.ogm.loader.OgmLoader

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