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.wicket.model.util;
018
019import java.util.ArrayList;
020import java.util.List;
021
022
023/**
024 * Based on <code>Model</code> but for lists of serializable objects.
025 * 
026 * @author Timo Rantalaiho
027 * @param <T>
028 *            type of object inside list
029 */
030public class ListModel<T> extends GenericBaseModel<List<T>>
031{
032        private static final long serialVersionUID = 1L;
033
034        /**
035         * Creates empty model
036         */
037        public ListModel()
038        {
039        }
040
041        /**
042         * Creates model that will contain <code>list</code>
043         * 
044         * @param list
045         */
046        public ListModel(List<T> list)
047        {
048                setObject(list);
049        }
050
051        @Override
052        protected List<T> createSerializableVersionOf(List<T> object)
053        {
054                if (object == null)
055                {
056                        return null;
057                }
058                else
059                {
060                        return new ArrayList<>(object);
061                }
062        }
063}