/*
* Copyright (c) 2008, 2009 Sun Microsystems. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Linda DeMichiel - Java Persistence 2.0 - Version 2.0 (October 1, 2009)
* Specification available from http://jcp.org/en/jsr/detail?id=317
*/
// $Id: Metamodel.java 20957 2011-06-13 09:58:51Z stliu $
package javax.persistence.metamodel;
import java.util.Set;
/**
* Provides access to the metamodel of persistent
* entities in the persistence unit.
*
* @since Java Persistence 2.0
*/
public interface Metamodel {
/**
* Return the metamodel entity type representing the entity.
*
* @param cls the type of the represented entity
*
* @return the metamodel entity type
*
* @throws IllegalArgumentException if not an entity
*/
<X> EntityType<X> entity(Class<X> cls);
/**
* Return the metamodel managed type representing the
* entity, mapped superclass, or embeddable class.
*
* @param cls the type of the represented managed class
*
* @return the metamodel managed type
*
* @throws IllegalArgumentException if not a managed class
*/
<X> ManagedType<X> managedType(Class<X> cls);
/**
* Return the metamodel embeddable type representing the
* embeddable class.
*
* @param cls the type of the represented embeddable class
*
* @return the metamodel embeddable type
*
* @throws IllegalArgumentException if not an embeddable class
*/
<X> EmbeddableType<X> embeddable(Class<X> cls);
/**
* Return the metamodel managed types.
*
* @return the metamodel managed types
*/
Set<ManagedType<?>> getManagedTypes();
/**
* Return the metamodel entity types.
*
* @return the metamodel entity types
*/
Set<EntityType<?>> getEntities();
/**
* Return the metamodel embeddable types. Returns empty set
* if there are no embeddable types.
*
* @return the metamodel embeddable types
*/
Set<EmbeddableType<?>> getEmbeddables();
}