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/*
 * 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.criteria;

import jakarta.persistence.metamodel.PluralAttribute;
import jakarta.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);
}




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