foundation/org.eclipse.persistence.core/src/main/java/org/eclipse/persistence/sessions/changesets/CollectionChangeRecord.java

/*
 * Copyright (c) 1998, 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:
//     Oracle - initial API and implementation from Oracle TopLink
package org.eclipse.persistence.sessions.changesets;

import java.util.*;

/**
 * <p>
 * <b>Purpose</b>: This interface defines the API for the changeRecord that maintains the changes made to a collection attribute of
 * an object.
 * <p>
 * <b>Description</b>: The CollectionChangeRecord stores a list of objects removed from the collection and a separate list of objects
 * added to a collection
 */
public interface CollectionChangeRecord extends ChangeRecord {

    /**
     * ADVANCED:
     * This method returns the Map that contains the added values to the collection
     * and their corresponding ChangeSets.
     * @return java.util.Vector
     */
    Map getAddObjectList();

    /**
     * ADVANCED:
     * This method returns the Map that contains the removed values from the collection
     * and their corresponding ChangeSets.
     * @return java.util.Vector
     */
    Map getRemoveObjectList();

    /**
     * ADVANCED:
     * This method returns true if the change set has changes
     * @return boolean
     */
    boolean hasChanges();
}