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.Attribute;


Represents a join-fetched association or attribute.

Type parameters:
  • <Z> –  the source type of the fetch
  • <X> –  the target type of the fetch
Since:Java Persistence 2.0
/**
 * Represents a join-fetched association or attribute.
 *
 * @param <Z>  the source type of the fetch
 * @param <X>  the target type of the fetch
 *
 * @since Java Persistence 2.0
 */
public interface Fetch<Z, X> extends FetchParent<Z, X> {

    
Return the metamodel attribute corresponding to the 
fetch join.

Returns:metamodel attribute for the join
/**
     * Return the metamodel attribute corresponding to the 
     * fetch join.
     * @return metamodel attribute for the join
     */
    Attribute<? super Z, ?> getAttribute();

    
Return the parent of the fetched item.

Returns:fetch parent
/**
     * Return the parent of the fetched item.
     * @return fetch parent
     */
    FetchParent<?, Z> getParent();

    
Return the join type used in the fetch join.

Returns:join type
/**
     * Return the join type used in the fetch join.
     * @return join type
     */
    JoinType getJoinType();
}