javax.persistence.criteria.FetchParent Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2019 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 javax.persistence.criteria;
import javax.persistence.metamodel.PluralAttribute;
import javax.persistence.metamodel.SingularAttribute;
/**
* Represents an element of the from clause which may
* function as the parent of Fetches.
*
* @param the source type
* @param the target type
*
* @since 2.0
*/
public interface FetchParent {
/**
* Return the fetch joins that have been made from this type.
* Returns empty set if no fetch joins have been made from
* this type.
* Modifications to the set do not affect the query.
* @return fetch joins made from this type
*/
java.util.Set> getFetches();
/**
* Create a fetch join to the specified single-valued attribute
* using an inner join.
* @param attribute target of the join
* @return the resulting fetch join
*/
Fetch fetch(SingularAttribute attribute);
/**
* Create a fetch join to the specified single-valued attribute
* using the given join type.
* @param attribute target of the join
* @param jt join type
* @return the resulting fetch join
*/
Fetch fetch(SingularAttribute attribute, JoinType jt);
/**
* Create a fetch join to the specified collection-valued
* attribute using an inner join.
* @param attribute target of the join
* @return the resulting join
*/
Fetch fetch(PluralAttribute attribute);
/**
* Create a fetch join to the specified collection-valued
* attribute using the given join type.
* @param attribute target of the join
* @param jt join type
* @return the resulting join
*/
Fetch fetch(PluralAttribute attribute, JoinType jt);
//String-based:
/**
* Create a fetch join to the specified attribute using an
* inner join.
* @param attributeName name of the attribute for the
* target of the join
* @return the resulting fetch join
* @throws IllegalArgumentException if attribute of the given
* name does not exist
*/
@SuppressWarnings("hiding")
Fetch fetch(String attributeName);
/**
* Create a fetch join to the specified attribute using
* the given join type.
* @param attributeName name of the attribute for the
* target of the join
* @param jt join type
* @return the resulting fetch join
* @throws IllegalArgumentException if attribute of the given
* name does not exist
*/
@SuppressWarnings("hiding")
Fetch fetch(String attributeName, JoinType jt);
}