001/**
002 * Copyright 2005-2016 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.krad.data.metadata;
017
018/**
019 * Sorting orders used for collection definitions and lookup generation.
020 * 
021 * @author Kuali Rice Team (rice.collab@kuali.org)
022 */
023public enum SortDirection {
024        ASCENDING,
025        DESCENDING,
026        // These latter are Oracle options on table sorting. However, recent ANSI
027        // standards have extended them as requiring to be understood by all databases.
028        // (Though not all support the style of sorting.)
029        ASCENDING_NULLS_FIRST,
030        ASCENDING_NULLS_LAST,
031        DESCENDING_NULLS_FIRST,
032        DESCENDING_NULLS_LAST
033}