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Hibernate's core ORM functionality

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or .
 */
package org.hibernate.mapping;

import org.hibernate.boot.spi.MetadataBuildingContext;
import org.hibernate.boot.spi.MetadataImplementor;
import org.hibernate.type.CollectionType;

/**
 * A bag permits duplicates, so it has no primary key
 * 
 * @author Gavin King
 */
public class Bag extends Collection {

	/**
	 * @deprecated Use {@link Bag#Bag(MetadataBuildingContext, PersistentClass)} instead.
	 */
	@Deprecated
	public Bag(MetadataImplementor metadata, PersistentClass owner) {
		super( metadata, owner );
	}

	public Bag(MetadataBuildingContext buildingContext, PersistentClass owner) {
		super( buildingContext, owner );
	}

	public CollectionType getDefaultCollectionType() {
		return getMetadata().getTypeResolver()
				.getTypeFactory()
				.bag( getRole(), getReferencedPropertyName() );
	}

	void createPrimaryKey() {
		//create an index on the key columns??
	}

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