View Javadoc

1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.myfaces.component.html.ext;
20  
21  import javax.faces.component.StateHolder;
22  import java.io.Serializable;
23  import java.util.ArrayList;
24  import java.util.List;
25  
26  /**
27   * @author Manfred Geiler (latest modification by $Author: grantsmith $)
28   * @version $Revision: 472630 $ $Date: 2006-11-08 15:40:03 -0500 (Wed, 08 Nov 2006) $
29   * %Log$
30   */
31  class _SerializableListDataModel
32          extends _SerializableDataModel
33  {
34      private static final long serialVersionUID = 2579712878688635627L;
35      //private static final Log log = LogFactory.getLog(_SerializableDataModel.class);
36  
37      public _SerializableListDataModel(int first, int rows, List list)
38      {
39          _first = first;
40          _rows = rows;
41          _rowCount = list.size();
42          if (_rows <= 0)
43          {
44              _rows = _rowCount - first;
45          }
46  
47          if (_rows == _rowCount)
48          {
49              //whole list must be saved
50              if (list instanceof Serializable || list instanceof StateHolder)
51              {
52                  _list = list;
53              }
54              else
55              {
56                  //copy list
57                  _list = new ArrayList(list);
58              }
59          }
60          else
61          {
62              int size = _rows > 0 && _rows < _rowCount ? _rows : _rowCount;
63              _list = new ArrayList(size);
64              if (size > _rowCount - _first)
65              {
66                  size = _rowCount - _first;
67              }
68              for (int i = 0; i < size; i++)
69              {
70                  _list.add(list.get(_first + i));
71              }
72          }
73      }
74  }