/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2011, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
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 */
package org.hibernate.engine;

Enumeration of values describing HOW fetching should occur.
Author:
Steve Ebersole
See Also:
FetchTiming/**
 * Enumeration of values describing <b>HOW</b> fetching should occur.
 *
 * @author Steve Ebersole
 * @see FetchTiming
 */
public enum FetchStyle {
	
Performs a separate SQL select to load the indicated data.  This can either be eager (the second select is
issued immediately) or lazy (the second select is delayed until the data is needed).
/**
	 * Performs a separate SQL select to load the indicated data.  This can either be eager (the second select is
	 * issued immediately) or lazy (the second select is delayed until the data is needed).
	 */
	SELECT,
	
Inherently an eager style of fetching.  The data to be fetched is obtained as part of an SQL join.
/**
	 * Inherently an eager style of fetching.  The data to be fetched is obtained as part of an SQL join.
	 */
	JOIN,
	
Initializes a number of indicated data items (entities or collections) in a series of grouped sql selects
using an in-style sql restriction to define the batch size.  Again, can be either eager or lazy.
/**
	 * Initializes a number of indicated data items (entities or collections) in a series of grouped sql selects
	 * using an in-style sql restriction to define the batch size.  Again, can be either eager or lazy.
	 */
	BATCH,
	
Performs fetching of associated data (currently limited to only collections) based on the sql restriction
used to load the owner.  Again, can be either eager or lazy.
/**
	 * Performs fetching of associated data (currently limited to only collections) based on the sql restriction
	 * used to load the owner.  Again, can be either eager or lazy.
	 */
	SUBSELECT
}