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;

The TupleElement interface defines an element that is returned in
a query result tuple.
Type parameters:
<X> – the type of the element
See Also:
Tuple
Since:
Java Persistence 2.0/**
 * The <code>TupleElement</code> interface defines an element that is returned in
 * a query result tuple.
 * @param <X> the type of the element
 *
 * @see Tuple
 *
 * @since Java Persistence 2.0
 */
public interface TupleElement<X> {
    
    
Return the Java type of the tuple element.
Returns:
the Java type of the tuple element/**
     * Return the Java type of the tuple element.
     * @return the Java type of the tuple element
     */
    Class<? extends X> getJavaType();

    
Return the alias assigned to the tuple element or null, 
if no alias has been assigned.
Returns:
alias/**
     * Return the alias assigned to the tuple element or null, 
     * if no alias has been assigned.
     * @return alias
     */
    String getAlias();
}