jpa/org.eclipse.persistence.jpa.jpql/src/main/java/org/eclipse/persistence/jpa/jpql/tools/model/IListChangeListener.java

/*
 * Copyright (c) 2011, 2020 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
//
package org.eclipse.persistence.jpa.jpql.tools.model;

/**
 * A <code>IListChangeListener</code> can be registered with a {@link
 * org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject StateObject} in order to be notified
 * when a list changes (items are added or removed from it or some items have been moved inside of
 * that list).
 *
 * @version 2.4
 * @since 2.4
 * @author Pascal Filion
 */
public interface IListChangeListener<T> {

    /**
     * Notifies this listener new items have been added to the list.
     *
     * @param e The {@link IListChangeEvent} object containing the information of the change
     */
    void itemsAdded(IListChangeEvent<T> e);

    /**
     * Notifies this listener the list had items moved within the list.
     *
     * @param e The {@link IListChangeEvent} object containing the information of the change
     */
    void itemsMoved(IListChangeEvent<T> e);

    /**
     * Notifies this listener items have been removed from the list.
     *
     * @param e The {@link IListChangeEvent} object containing the information of the change
     */
    void itemsRemoved(IListChangeEvent<T> e);
}