Java Code Examples for org.hibernate.persister.collection.CollectionPersister#getElementType()

@Override
public boolean needsRecreate(CollectionPersister persister) {
	// Workaround for situations like HHH-7072.  If the collection element is a component that consists entirely
	// of nullable properties, we currently have to forcefully recreate the entire collection.  See the use
	// of hasNotNullableColumns in the AbstractCollectionPersister constructor for more info.  In order to delete
	// row-by-row, that would require SQL like "WHERE ( COL = ? OR ( COL is null AND ? is null ) )", rather than
	// the current "WHERE COL = ?" (fails for null for most DBs).  Note that
	// the param would have to be bound twice.  Until we eventually add "parameter bind points" concepts to the
	// AST in ORM 5+, handling this type of condition is either extremely difficult or impossible.  Forcing
	// recreation isn't ideal, but not really any other option in ORM 4.
	// Selecting a type used in where part of update statement
	// (must match condidion in org.hibernate.persister.collection.BasicCollectionPersister.doUpdateRows).
	// See HHH-9474
	Type whereType;
	if ( persister.hasIndex() ) {
		whereType = persister.getIndexType();
	}
	else {
		whereType = persister.getElementType();
	}
	if ( whereType instanceof CompositeType ) {
		CompositeType componentIndexType = (CompositeType) whereType;
		return !componentIndexType.hasNotNullProperty();
	}
	return false;
}
 

public void initializeFromCache(CollectionPersister persister, Serializable disassembled, Object owner)
throws HibernateException {
	
	Type elementType = persister.getElementType();
	Type indexType = persister.getIndexType();
	final String indexNodeName = getIndexAttributeName(persister);

	Serializable[] cached = (Serializable[]) disassembled;

	for ( int i=0; i<cached.length; ) {
		Object index = indexType.assemble( cached[i++], getSession(), owner );
		Object object = elementType.assemble( cached[i++], getSession(), owner );
		
		Element subelement = element.addElement( persister.getElementNodeName() );
		elementType.setToXMLNode( subelement, object, persister.getFactory() );
		
		String indexString = ( (NullableType) indexType ).toXMLString( index, persister.getFactory() );
		setIndex( subelement, indexNodeName, indexString );
	}
	
}
 

public Serializable disassemble(CollectionPersister persister) throws HibernateException {
	
	Type elementType = persister.getElementType();
	Type indexType = persister.getIndexType();
	final String indexNodeName = getIndexAttributeName(persister);

	List elements =  element.elements( persister.getElementNodeName() );
	int length = elements.size();
	Serializable[] result = new Serializable[length*2];
	for ( int i=0; i<length*2; ) {
		Element elem = (Element) elements.get(i/2);
		Object object = elementType.fromXMLNode( elem, persister.getFactory() );
		final String indexString = getIndex(elem, indexNodeName, i);
		Object index = ( (NullableType) indexType ).fromXMLString( indexString, persister.getFactory() );
		result[i++] = indexType.disassemble( index, getSession(), null );
		result[i++] = elementType.disassemble( object, getSession(), null );
	}
	return result;
}
 

@Override
public boolean equalsSnapshot(CollectionPersister persister) throws HibernateException {
	final Type elementType = persister.getElementType();
	final java.util.Map sn = (java.util.Map) getSnapshot();
	if ( sn.size()!=set.size() ) {
		return false;
	}
	else {
		for ( Object test : set ) {
			final Object oldValue = sn.get( test );
			if ( oldValue == null || elementType.isDirty( oldValue, test, getSession() ) ) {
				return false;
			}
		}
		return true;
	}
}
 

@Override
public boolean equalsSnapshot(CollectionPersister persister) throws HibernateException {
	final Type elementType = persister.getElementType();
	final List sn = (List) getSnapshot();
	if ( sn.size()!=this.list.size() ) {
		return false;
	}
	final Iterator itr = list.iterator();
	final Iterator snapshotItr = sn.iterator();
	while ( itr.hasNext() ) {
		if ( elementType.isDirty( itr.next(), snapshotItr.next(), getSession() ) ) {
			return false;
		}
	}
	return true;
}
 

@Override
public boolean equalsSnapshot(CollectionPersister persister) throws HibernateException {
	final Type elementType = persister.getElementType();
	final Map snap = (Map) getSnapshot();
	if ( snap.size()!= values.size() ) {
		return false;
	}
	for ( int i=0; i<values.size(); i++ ) {
		final Object value = values.get( i );
		final Object id = identifiers.get( i );
		if ( id == null ) {
			return false;
		}
		final Object old = snap.get( id );
		if ( elementType.isDirty( old, value, getSession() ) ) {
			return false;
		}
	}
	return true;
}
 

public boolean equalsSnapshot(CollectionPersister persister) throws HibernateException {
	Type elementType = persister.getElementType();
	java.util.Map sn = (java.util.Map) getSnapshot();
	if ( sn.size()!=set.size() ) {
		return false;
	}
	else {
		Iterator iter = set.iterator();
		while ( iter.hasNext() ) {
			Object test = iter.next();
			Object oldValue = sn.get(test);
			if ( oldValue==null || elementType.isDirty( oldValue, test, getSession() ) ) return false;
		}
		return true;
	}
}
 

private EntityReferenceAliases createCollectionElementAliases(
		CollectionPersister collectionPersister,
		String tableAlias,
		String elementQuerySpaceUid) {

	if ( !collectionPersister.getElementType().isEntityType() ) {
		return null;
	}
	else {
		final EntityType entityElementType = (EntityType) collectionPersister.getElementType();
		return generateEntityReferenceAliases(
				elementQuerySpaceUid,
				tableAlias,
				(EntityPersister) entityElementType.getAssociatedJoinable( sessionFactory() )
		);
	}
}
 

public Object readFrom(ResultSet rs, CollectionPersister persister, CollectionAliases descriptor, Object owner)
throws HibernateException, SQLException {
	Object object = persister.readElement( rs, owner, descriptor.getSuffixedElementAliases(), getSession() );
	final Type elementType = persister.getElementType();
	final SessionFactoryImplementor factory = persister.getFactory();
	String indexNode = getIndexAttributeName(persister);

	Element elem = element.addElement( persister.getElementNodeName() );
	elementType.setToXMLNode( elem, object, factory ); 
	
	final Type indexType = persister.getIndexType();
	final Object indexValue = persister.readIndex( rs, descriptor.getSuffixedIndexAliases(), getSession() );
	final String index = ( (NullableType) indexType ).toXMLString( indexValue, factory );
	setIndex(elem, indexNode, index);
	return object;
}
 

public Iterator entries(CollectionPersister persister) {
	
	final Type elementType = persister.getElementType();
	List elements =  element.elements( persister.getElementNodeName() );
	int length = elements.size();
	List result = new ArrayList(length);
	for ( int i=0; i<length; i++ ) {
		Element elem = (Element) elements.get(i);
		Object object = elementType.fromXMLNode( elem, persister.getFactory() );
		result.add(object);
	}
	return result.iterator();
}
 

public Iterator entries(CollectionPersister persister) {
	
	final Type elementType = persister.getElementType();
	String indexNode = getIndexAttributeName(persister);
	List elements =  element.elements( persister.getElementNodeName() );
	int length = elements.size();
	List result = new ArrayList(length);
	for ( int i=0; i<length; i++ ) {
		Element elem = (Element) elements.get(i);
		Object object = elementType.fromXMLNode( elem, persister.getFactory() );
		result.add( new IndexedValue( getIndex(elem, indexNode, i), object ) );
	}
	return result.iterator();
}
 

public Serializable getSnapshot(CollectionPersister persister) 
throws HibernateException {
	
	final Type elementType = persister.getElementType();		
	List elements = element.elements( persister.getElementNodeName() );
	ArrayList snapshot = new ArrayList( elements.size() );
	for ( int i=0; i<elements.size(); i++ ) {
		Element elem = (Element) elements.get(i);
		Object value = elementType.fromXMLNode( elem, persister.getFactory() );
		Object copy = elementType.deepCopy(value , getSession().getEntityMode(), persister.getFactory() );
		snapshot.add(copy);
	}
	return snapshot;
	
}
 

/**
 * Cascade an action to a collection
 */
private void cascadeCollection(
		final int componentPathStackDepth,
		final Object child,
		final CascadeStyle style,
		final CollectionType type) {
	final CollectionPersister persister =
			eventSource.getFactory().getMetamodel().collectionPersister( type.getRole() );
	final Type elemType = persister.getElementType();

	CascadePoint elementsCascadePoint = cascadePoint;
	if ( cascadePoint == CascadePoint.AFTER_INSERT_BEFORE_DELETE ) {
		cascadePoint = CascadePoint.AFTER_INSERT_BEFORE_DELETE_VIA_COLLECTION;
	}

	//cascade to current collection elements
	if ( elemType.isEntityType() || elemType.isAnyType() || elemType.isComponentType() ) {
		cascadeCollectionElements(
			componentPathStackDepth,
			child,
			type,
			style,
			elemType,
			persister.isCascadeDeleteEnabled()
		);
	}

	cascadePoint = elementsCascadePoint;
}
 

@Override
public boolean equalsSnapshot(CollectionPersister persister) throws HibernateException {
	final Type elementType = persister.getElementType();
	final Serializable snapshot = getSnapshot();
	final int xlen = Array.getLength( snapshot );
	if ( xlen!= Array.getLength( array ) ) {
		return false;
	}
	for ( int i=0; i<xlen; i++) {
		if ( elementType.isDirty( Array.get( snapshot, i ), Array.get( array, i ), getSession() ) ) {
			return false;
		}
	}
	return true;
}
 

public Serializable disassemble(CollectionPersister persister) throws HibernateException {
	
	Type elementType = persister.getElementType();
	List elements =  element.elements( persister.getElementNodeName() );
	int length = elements.size();
	Serializable[] result = new Serializable[length];
	for ( int i=0; i<length; i++ ) {
		Element elem = (Element) elements.get(i);
		Object object = elementType.fromXMLNode( elem, persister.getFactory() );
		result[i] = elementType.disassemble( object, getSession(), null );
	}
	return result;
}
 

public Serializable disassemble(CollectionPersister persister) throws HibernateException {
			
	Type elementType = persister.getElementType();
	final String indexNodeName = getIndexAttributeName(persister);
	List elements =  element.elements( persister.getElementNodeName() );
	int length = elements.size();
	Serializable[] result = new Serializable[length];
	for ( int i=0; i<length; i++ ) {
		Element elem = (Element) elements.get(i);
		Object object = elementType.fromXMLNode( elem, persister.getFactory() );
		Integer index = (Integer) Hibernate.INTEGER.fromStringValue( getIndex(elem, indexNodeName, i) );
		result[ index.intValue() ] = elementType.disassemble( object, getSession(), null );
	}
	return result;
}
 

public boolean equalsSnapshot(CollectionPersister persister) throws HibernateException {
	Type elementType = persister.getElementType();
	EntityMode entityMode = getSession().getEntityMode();
	List sn = (List) getSnapshot();
	if ( sn.size()!=bag.size() ) return false;
	Iterator iter = bag.iterator();
	while ( iter.hasNext() ) {
		Object elt = iter.next();
		final boolean unequal = countOccurrences(elt, bag, elementType, entityMode) !=
			countOccurrences(elt, sn, elementType, entityMode);
		if ( unequal ) return false;
	}
	return true;
}
 

public Iterator getDeletes(CollectionPersister persister, boolean indexIsFormula) throws HibernateException {
	//if ( !persister.isOneToMany() ) throw new AssertionFailure("Not implemented for Bags");
	Type elementType = persister.getElementType();
	EntityMode entityMode = getSession().getEntityMode();
	ArrayList deletes = new ArrayList();
	List sn = (List) getSnapshot();
	Iterator olditer = sn.iterator();
	int i=0;
	while ( olditer.hasNext() ) {
		Object old = olditer.next();
		Iterator newiter = bag.iterator();
		boolean found = false;
		if ( bag.size()>i && elementType.isSame( old, bag.get(i++), entityMode ) ) {
		//a shortcut if its location didn't change!
			found = true;
		}
		else {
			//search for it
			//note that this code is incorrect for other than one-to-many
			while ( newiter.hasNext() ) {
				if ( elementType.isSame( old, newiter.next(), entityMode ) ) {
					found = true;
					break;
				}
			}
		}
		if (!found) deletes.add(old);
	}
	return deletes.iterator();
}
 

public void initializeFromCache(CollectionPersister persister, Serializable disassembled, Object owner)
throws HibernateException {
	
	Type elementType = persister.getElementType();
	final String indexNodeName = getIndexAttributeName(persister);
	Serializable[] cached = (Serializable[]) disassembled;
	for ( int i=0; i<cached.length; i++ ) {
		Object object = elementType.assemble( cached[i], getSession(), owner );
		Element subelement = element.addElement( persister.getElementNodeName() );
		elementType.setToXMLNode( subelement, object, persister.getFactory() );
		setIndex( subelement, indexNodeName, Integer.toString(i) );
	}
	
}
 

private CollectionFetchableElement buildElementGraph() {
	final CollectionPersister persister = collectionQuerySpace.getCollectionPersister();
	final Type type = persister.getElementType();
	if ( type.isAssociationType() ) {
		if ( type.isEntityType() ) {
			final EntityPersister elementPersister = persister.getFactory().getEntityPersister(
					( (EntityType) type ).getAssociatedEntityName()
			);
			final ExpandingEntityQuerySpace entityQuerySpace = QuerySpaceHelper.INSTANCE.makeEntityQuerySpace(
					collectionQuerySpace,
					elementPersister,
					CollectionPropertyNames.COLLECTION_ELEMENTS,
					(EntityType) persister.getElementType(),
					collectionQuerySpace.getExpandingQuerySpaces().generateImplicitUid(),
					collectionQuerySpace.canJoinsBeRequired(),
					allowElementJoin
			);
			return new CollectionFetchableElementEntityGraph( this, entityQuerySpace );
		}
		else if ( type.isAnyType() ) {
			return new CollectionFetchableElementAnyGraph( this );
		}
	}
	else if ( type.isComponentType() ) {
		final ExpandingCompositeQuerySpace compositeQuerySpace = QuerySpaceHelper.INSTANCE.makeCompositeQuerySpace(
				collectionQuerySpace,
				new CompositePropertyMapping(
						(CompositeType) persister.getElementType(),
						(PropertyMapping) persister,
						""
				),
				CollectionPropertyNames.COLLECTION_ELEMENTS,
				(CompositeType) persister.getElementType(),
				collectionQuerySpace.getExpandingQuerySpaces().generateImplicitUid(),
				collectionQuerySpace.canJoinsBeRequired(),
				allowElementJoin
		);
		return new CollectionFetchableElementCompositeGraph( this, compositeQuerySpace );
	}

	return null;
}