001/* 002 * This library is part of OpenCms - 003 * the Open Source Content Management System 004 * 005 * Copyright (c) Alkacon Software GmbH & Co. KG (http://www.alkacon.com) 006 * 007 * This library is free software; you can redistribute it and/or 008 * modify it under the terms of the GNU Lesser General Public 009 * License as published by the Free Software Foundation; either 010 * version 2.1 of the License, or (at your option) any later version. 011 * 012 * This library is distributed in the hope that it will be useful, 013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 015 * Lesser General Public License for more details. 016 * 017 * For further information about Alkacon Software, please see the 018 * company website: http://www.alkacon.com 019 * 020 * For further information about OpenCms, please see the 021 * project website: http://www.opencms.org 022 * 023 * You should have received a copy of the GNU Lesser General Public 024 * License along with this library; if not, write to the Free Software 025 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 026 */ 027 028package org.opencms.ui.util; 029 030import java.util.Collection; 031 032import com.vaadin.v7.data.Container; 033import com.vaadin.v7.data.util.ItemSorter; 034 035/** 036 * Interface for item sorters that evaluate the sortable container properties.<p> 037 */ 038public interface I_CmsItemSorter extends ItemSorter { 039 040 /** 041 * Returns the sortable container property ids.<p> 042 * 043 * @param container the container to be sorted 044 * 045 * @return the sortable container property ids 046 */ 047 Collection<?> getSortableContainerPropertyIds(Container container); 048}