1 /** 2 * This file Copyright (c) 2018 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.ui.framework.databinding; 35 36 import java.util.Collection; 37 import java.util.List; 38 import java.util.Locale; 39 import java.util.stream.Stream; 40 41 /** 42 * Used in multi-value field for child item hierarchy management. 43 * 44 * TODO: Better name? This does not only takes care about order, but also provides {@link ItemProviderStrategy} and new items. 45 * @param <T> item type. 46 */ 47 public interface MultiFieldOrderHandler<T> { 48 49 Stream<ItemProviderStrategy<T>> readItems(T root, Locale locale); 50 51 T getOrCreate(T parent, String name, Locale locale); 52 53 void removeItems(Collection<T> items); 54 55 void applyOrder(T parent, List<T> itemOrder, Locale locale); 56 }