01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License version 2
11: * as published by the Free Software Foundation.
12: *
13: * Resin Open Source is distributed in the hope that it will be useful,
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
16: * of NON-INFRINGEMENT. See the GNU General Public License for more
17: * details.
18: *
19: * You should have received a copy of the GNU General Public License
20: * along with Resin Open Source; if not, write to the
21: *
22: * Free Software Foundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package javax.faces.model;
30:
31: import java.util.List;
32:
33: public class ListDataModel extends DataModel {
34: private List _value;
35: private int _rowIndex = -1;
36:
37: public ListDataModel() {
38: }
39:
40: public ListDataModel(List value) {
41: _value = value;
42: setRowIndex(0);
43: }
44:
45: public int getRowCount() {
46: if (_value != null)
47: return _value.size();
48: else
49: return -1;
50: }
51:
52: public Object getRowData() {
53: if (_value == null)
54: return null;
55: else if (getRowIndex() < _value.size())
56: return _value.get(getRowIndex());
57: else
58: throw new IllegalArgumentException();
59: }
60:
61: public boolean isRowAvailable() {
62: return _value != null && getRowIndex() >= 0
63: && getRowIndex() < _value.size();
64: }
65:
66: public Object getWrappedData() {
67: return _value;
68: }
69:
70: public void setWrappedData(Object data) {
71: _value = (List) data;
72: setRowIndex(0);
73: }
74:
75: public int getRowIndex() {
76: return _rowIndex;
77: }
78:
79: public void setRowIndex(int index) {
80: if (_value != null && index < -1)
81: throw new IllegalArgumentException("rowIndex '" + index
82: + "' cannot be less than -1.");
83:
84: DataModelListener[] listeners = getDataModelListeners();
85:
86: if (listeners.length > 0 && _value != null
87: && _rowIndex != index) {
88: DataModelEvent event = new DataModelEvent(this , index,
89: _value);
90:
91: for (int i = 0; i < listeners.length; i++) {
92: listeners[i].rowSelected(event);
93: }
94: }
95:
96: _rowIndex = index;
97: }
98: }
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