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 /*
  * 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;
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.

Parameters:
cls the type of the represented entity
Returns:
the metamodel entity type
Throws:
java.lang.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.

Parameters:
cls the type of the represented managed class
Returns:
the metamodel managed type
Throws:
java.lang.IllegalArgumentException if not a managed class
	<X> ManagedType<X> managedType(Class<X> cls);

Return the metamodel embeddable type representing the embeddable class.

Parameters:
cls the type of the represented embeddable class
Returns:
the metamodel embeddable type
Throws:
java.lang.IllegalArgumentException if not an embeddable class
	<X> EmbeddableType<X> embeddable(Class<X> cls);

Return the metamodel managed types.

Returns:
the metamodel managed types
Return the metamodel entity types.

Returns:
the metamodel entity types
Return the metamodel embeddable types. Returns empty set if there are no embeddable types.

Returns:
the metamodel embeddable types
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