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19 package javax.faces.model;
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27 public class ArrayDataModel extends DataModel
28 {
29
30 private int _rowIndex = -1;
31 private Object[] _data;
32
33
34 public ArrayDataModel()
35 {
36 super();
37 }
38
39 public ArrayDataModel(Object[] array)
40 {
41 if (array == null) throw new NullPointerException("array");
42 setWrappedData(array);
43 }
44
45
46 public int getRowCount()
47 {
48 if (_data == null)
49 {
50 return -1;
51 }
52 return _data.length;
53 }
54
55 public Object getRowData()
56 {
57 if (_data == null)
58 {
59 return null;
60 }
61 if (!isRowAvailable())
62 {
63 throw new IllegalArgumentException("row is unavailable");
64 }
65 return _data[_rowIndex];
66 }
67
68 public int getRowIndex()
69 {
70 return _rowIndex;
71 }
72
73 public Object getWrappedData()
74 {
75 return _data;
76 }
77
78 public boolean isRowAvailable()
79 {
80 if (_data == null)
81 {
82 return false;
83 }
84 return _rowIndex >= 0 && _rowIndex < _data.length;
85 }
86
87 public void setRowIndex(int rowIndex)
88 {
89 if (rowIndex < -1)
90 {
91 throw new IllegalArgumentException("illegal rowIndex " + rowIndex);
92 }
93 int oldRowIndex = _rowIndex;
94 _rowIndex = rowIndex;
95 if (_data != null && oldRowIndex != _rowIndex)
96 {
97 Object data = isRowAvailable() ? getRowData() : null;
98 DataModelEvent event = new DataModelEvent(this, _rowIndex, data);
99 DataModelListener[] listeners = getDataModelListeners();
100 for (int i = 0; i < listeners.length; i++)
101 {
102 listeners[i].rowSelected(event);
103 }
104 }
105 }
106
107 public void setWrappedData(Object data)
108 {
109 _data = (Object[])data;
110 int rowIndex = _data != null ? 0 : -1;
111 setRowIndex(rowIndex);
112 }
113
114 }