jakarta.persistence.FetchType Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2023 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Linda DeMichiel - 2.1
// Linda DeMichiel - 2.0
package jakarta.persistence;
/**
* Defines strategies for fetching data from the database.
*
* - The {@link #EAGER} strategy is a requirement on the
* persistence provider runtime that data must be eagerly
* fetched.
*
- The {@link #LAZY} strategy is a hint to the persistence
* provider runtime that data should be fetched lazily when
* it is first accessed. The implementation is permitted to
* eagerly fetch data for which the {@code LAZY} strategy
* hint has been specified.
*
*
* Example:
* {@snippet :
* @Basic(fetch = LAZY)
* protected String getName() { return name; }
* }
*
* @see Basic
* @see ElementCollection
* @see ManyToMany
* @see OneToMany
* @see ManyToOne
* @see OneToOne
*
* @since 1.0
*/
public enum FetchType {
/**
* Data may be lazily fetched.
*/
LAZY,
/**
* Data must be eagerly fetched.
*/
EAGER
}
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