public Set(PersistentClass owner) 
{
		super(owner);
}

Constructor for Set.

Parameters:

owner -

 public Object accept(ValueVisitor visitor) 
{
		return visitor.accept(this);
}

  void createPrimaryKey() 
{
		if ( !isOneToMany() ) {
			PrimaryKey pk = new PrimaryKey();
			pk.addColumns( getKey().getColumnIterator() );
			Iterator iter = getElement().getColumnIterator();
			while ( iter.hasNext() ) {
				Object selectable = iter.next();
				if ( selectable instanceof Column ) {
					Column col = (Column) selectable;
					if ( !col.isNullable() ) {
						pk.addColumn(col);
					}
				}
			}
			if ( pk.getColumnSpan()==getKey().getColumnSpan() ) { 
				//for backward compatibility, allow a set with no not-null 
				//element columns, using all columns in the row locater SQL
				//TODO: create an implicit not null constraint on all cols?
			}
			else {
				getCollectionTable().setPrimaryKey(pk);
			}
		}
		else {
			//create an index on the key columns??
		}
}

 public CollectionType getDefaultCollectionType() 
{
		if ( isSorted() ) {
			return TypeFactory.sortedSet( getRole(), getReferencedPropertyName(), isEmbedded(), getComparator() );
		}
		else if ( hasOrder() ) {
			return TypeFactory.orderedSet( getRole(), getReferencedPropertyName(), isEmbedded() );
		}
		else {
			return TypeFactory.set( getRole(), getReferencedPropertyName(), isEmbedded() );
		}
}

 public boolean isSet() 
{
		return true;
}

 public  void validate(Mapping mapping) throws MappingException 
{
		super.validate( mapping );
		//for backward compatibility, disable this:
		/*Iterator iter = getElement().getColumnIterator();
		while ( iter.hasNext() ) {
			Column col = (Column) iter.next();
			if ( !col.isNullable() ) {
				return;
			}
		}
		throw new MappingException("set element mappings must have at least one non-nullable column: " + getRole() );*/
}