001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau;
018
019/**
020 * Identifies how to add elements to a list.
021 *
022 */
023public enum ListOperation {
024
025   /**
026    * Elements should be added to the end of the list.
027    */
028   APPEND,
029
030   /**
031    * Elements should be added to the beginning of the list.
032    */
033   PREPEND,
034
035   /**
036    * Elements should be replaced inline and/or appended to the end of the list.
037    */
038   SET,
039
040   /**
041    * Elements should be added as default values that are added to the list if they're not already set.
042    */
043   DEFAULT;
044}