https://github.com/javaee/jpa-spec: Java(TM) Persistence API 
Copyright (c) 2008 - 2013 Oracle Corporation. 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 2.1
    Linda DeMichiel - Java Persistence 2.0

/*******************************************************************************
 * Copyright (c) 2008 - 2013 Oracle Corporation. 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 2.1
 *     Linda DeMichiel - Java Persistence 2.0
 *
 ******************************************************************************/ 
package javax.persistence.criteria;

import javax.persistence.metamodel.EntityType;


A root type in the from clause.
Query roots always reference entities.

Type parameters:
  • <X> – the entity type referenced by the root
Since:Java Persistence 2.0
/**
 * A root type in the from clause.
 * Query roots always reference entities.
 *
 * @param <X> the entity type referenced by the root
 *
 * @since Java Persistence 2.0
 */
public interface Root<X> extends From<X, X> {

    
Return the metamodel entity corresponding to the root.

Returns:metamodel entity corresponding to the root
/**
     * Return the metamodel entity corresponding to the root.
     * @return metamodel entity corresponding to the root
     */
    EntityType<X> getModel();
}