Examples of org.hibernate.persister.collection.CollectionPersister

Package org.hibernate.persister.collection

Examples of org.hibernate.persister.collection.CollectionPersister

org.hibernate.persister.collection.CollectionPersister
A strategy for persisting a collection role. Defines a contract between the persistence strategy and the actual persistent collection framework and session. Does not define operations that are required for querying collections, or loading by outer join.

Implements persistence of a collection instance while the instance is referenced in a particular role.

This class is highly coupled to the PersistentCollection hierarchy, since double dispatch is used to load and update collection elements.

May be considered an immutable view of the mapping object @see QueryableCollection @see PersistentCollection @author Gavin King

  
  protected Object readElementByIndex(Object index) {
    if (!initialized) {
      throwLazyInitializationExceptionIfNotConnected();
      CollectionEntry entry = session.getPersistenceContext().getCollectionEntry(this);
      CollectionPersister persister = entry.getLoadedPersister();
      if ( persister.isExtraLazy() ) {
        if ( hasQueuedOperations() ) {
          session.flush();
        }
        return persister.getElementByIndex( entry.getLoadedKey(), index, session, owner );
      }
    }
    read();
    return UNKNOWN;

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    return userType.indexOf(collection, entity);
  }


  public Object replaceElements(Object original, Object target, Object owner, Map copyCache, SessionImplementor session)
  throws HibernateException {
    CollectionPersister cp = session.getFactory().getCollectionPersister( getRole() );
    return userType.replaceElements(original, target, cp, owner, copyCache, session);
  }

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    scalarColumnNames = NameGenerator.generateColumnNames( returnTypes, getFactory() );


    // initialize the Set of queried identifier spaces (ie. tables)
    Iterator iter = collections.values().iterator();
    while ( iter.hasNext() ) {
      CollectionPersister p = getCollectionPersister( ( String ) iter.next() );
      addQuerySpaces( p.getCollectionSpaces() );
    }
    iter = typeMap.keySet().iterator();
    while ( iter.hasNext() ) {
      Queryable p = getEntityPersisterForName( ( String ) iter.next() );
      addQuerySpaces( p.getQuerySpaces() );
    }


    sqlString = sql.toQueryString();


    if ( holderClass != null ) holderConstructor = ReflectHelper.getConstructor( holderClass, returnTypes );

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        final Object owner = hasCollectionOwners ?
            row[ collectionOwners[i] ] :
            null; //if null, owner will be retrieved from session


        final CollectionPersister collectionPersister = collectionPersisters[i];
        final Serializable key;
        if ( owner == null ) {
          key = null;
        }
        else {
          key = collectionPersister.getCollectionType().getKeyOfOwner( owner, session );
          //TODO: old version did not require hashmap lookup:
          //keys[collectionOwner].getIdentifier()
        }


        readCollectionElement(

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


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


    // 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() ) {
          session.initializeCollection( collection, false );
        }
        else if ( !persister.isLazy() ) {
          persistenceContext.addNonLazyCollection( collection );
        }
  
        if ( hasHolder() ) {
          session.getPersistenceContext().addCollectionHolder( collection );

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    // this is a collection initializer, so we must create a collection
    // for each of the passed-in keys, to account for the possibility
    // that the collection is empty and has no rows in the result set
    //
    // todo : move this inside CollectionReturn ?
    CollectionPersister persister = ( (CollectionReturn) loadPlan.getReturns().get( 0 ) ).getCollectionPersister();
    for ( Serializable key : collectionKeys ) {
      if ( LOG.isDebugEnabled() ) {
        LOG.debugf(
            "Preparing collection intializer : %s",
              MessageHelper.collectionInfoString( persister, key, session.getFactory() )

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      throw new IllegalStateException( "Collection element (many-to-many) table alias cannot be empty" );
    }
    if ( JoinDefinedByMetadata.class.isInstance( join ) &&
        CollectionPropertyNames.COLLECTION_ELEMENTS.equals( ( (JoinDefinedByMetadata) join ).getJoinedPropertyName() ) ) {
      final CollectionQuerySpace leftHandSide = (CollectionQuerySpace) join.getLeftHandSide();
      final CollectionPersister persister = leftHandSide.getCollectionPersister();
      final String manyToManyFilter = persister.getManyToManyFilterFragment(
          entityTableAlias,
          buildingParameters.getQueryInfluencers().getEnabledFilters()
      );
      joinFragment.addCondition( manyToManyFilter );
    }

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        final Object owner = hasCollectionOwners ?
            row[ collectionOwners[i] ] :
            null; //if null, owner will be retrieved from session


        final CollectionPersister collectionPersister = collectionPersisters[i];
        final Serializable key;
        if ( owner == null ) {
          key = null;
        }
        else {
          key = collectionPersister.getCollectionType().getKeyOfOwner( owner, session );
          //TODO: old version did not require hashmap lookup:
          //keys[collectionOwner].getIdentifier()
        }


        readCollectionElement(

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    // note: the logic for adding to the userAliasList is still strictly based on consumesEntityAlias return value
    boolean checkForSqlAlias = joinable.consumesEntityAlias();


    if ( !checkForSqlAlias && joinable.isCollection() ) {
      // is it a collection-of-other (component or value) ?
      CollectionPersister collectionPersister = (CollectionPersister)joinable;
      Type elementType = collectionPersister.getElementType();
      if ( elementType.isComponentType() || !elementType.isEntityType() ) {
        checkForSqlAlias = true;
       }
    }

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    scalarColumnNames = NameGenerator.generateColumnNames( returnTypes, getFactory() );


    // initialize the Set of queried identifier spaces (ie. tables)
    Iterator iter = collections.values().iterator();
    while ( iter.hasNext() ) {
      CollectionPersister p = getCollectionPersister( ( String ) iter.next() );
      addQuerySpaces( p.getCollectionSpaces() );
    }
    iter = typeMap.keySet().iterator();
    while ( iter.hasNext() ) {
      Queryable p = getEntityPersisterForName( ( String ) iter.next() );
      addQuerySpaces( p.getQuerySpaces() );
    }


    sqlString = sql.toQueryString();


    if ( holderClass != null ) holderConstructor = ReflectHelper.getConstructor( holderClass, returnTypes );

View Full Code Here

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org.hibernate.action.BulkOperationCleanupAction

org.hibernate.action.CollectionUpdateAction

org.hibernate.action.internal.BulkOperationCleanupAction

org.hibernate.action.internal.CollectionUpdateAction

org.hibernate.action.internal.QueuedOperationCollectionAction

org.hibernate.cache.internal.CollectionCacheInvalidator

org.hibernate.collection.AbstractPersistentCollection

org.hibernate.collection.internal.AbstractPersistentCollection

org.hibernate.collection.internal.ExtraLazyElementByIndexReader

org.hibernate.engine.Cascade

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