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;


An object that defines an ordering over the query results.

Since:Java Persistence 2.0
/**
 * An object that defines an ordering over the query results.
 *
 * @since Java Persistence 2.0
 */
public interface Order {

   
Switch the ordering.

Returns:a new Order instance with the reversed ordering
/**
    * Switch the ordering.
    * @return a new <code>Order</code> instance with the reversed ordering
    */
    Order reverse();

   
Whether ascending ordering is in effect.

Returns:boolean indicating whether ordering is ascending
/**
    * Whether ascending ordering is in effect.
    * @return boolean indicating whether ordering is ascending
    */
    boolean isAscending();

   
Return the expression that is used for ordering.

Returns:expression used for ordering
/**
    * Return the expression that is used for ordering.
    * @return expression used for ordering
    */
   Expression<?> getExpression();
}