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1 package org.objectstyle.cayenne.swing;
2
3 import java.awt.Component  ;
4 import java.util.ArrayList ;
5 import java.util.Arrays ;
6 import java.util.Collection ;
7 import java.util.List ;
8 import java.util.Map ;
9
10 import javax.swing.JTable ;
11 import javax.swing.table.AbstractTableModel ;
12
13 import org.apache.commons.collections.map.SingletonMap;
14
15
20 public class TableBinding extends BindingBase {
21
22
25 public static final String ITEM_VAR = "item";
26
27 protected JTable table;
28 protected String [] headers;
29 protected BindingExpression[] columns;
30 protected boolean[] editableState;
31 protected Class [] columnClass;
32 protected List list;
33
34 public TableBinding(JTable table, String listBinding, String [] headers,
35 BindingExpression[] columns, Class [] columnClass, boolean[] editableState) {
36
37 super(listBinding);
38 this.table = table;
39 this.headers = headers;
40 this.columns = columns;
41 this.editableState = editableState;
42 this.columnClass = columnClass;
43
44 table.setModel(new BoundTableModel());
45 }
46
47 public void setContext(Object object) {
48 super.setContext(object);
49
50 this.list = updateList();
51 }
52
53 public Component getView() {
54 return table;
55 }
56
57 public void updateView() {
58 this.list = updateList();
59 ((BoundTableModel) table.getModel()).fireTableDataChanged();
60 }
61
62 int getListSize() {
63 return (list != null) ? list.size() : 0;
64 }
65
66 List updateList() {
67 if (getContext() == null) {
68 return null;
69 }
70
71 Object list = getValue();
72 if (list == null) {
73 return null;
74 }
75
76 if (list instanceof List ) {
77 return (List ) list;
78 }
79
80 if (list instanceof Object []) {
81 Object [] objects = (Object []) list;
82 return Arrays.asList(objects);
83 }
84
85 if (list instanceof Collection ) {
86 return new ArrayList ((Collection ) list);
87 }
88
89 throw new BindingException("List expected, got - " + list);
90 }
91
92 final class BoundTableModel extends AbstractTableModel {
93
94 Map listContext = new SingletonMap(ITEM_VAR, null);
97
98 public int getColumnCount() {
99 return headers.length;
100 }
101
102 public int getRowCount() {
103 return getListSize();
104 }
105
106 public boolean isCellEditable(int rowIndex, int columnIndex) {
107 return editableState[columnIndex];
108 }
109
110 public Object getValueAt(int rowIndex, int columnIndex) {
111 Object item = list.get(rowIndex);
112 listContext.put(ITEM_VAR, item);
113 return columns[columnIndex].getValue(getContext(), listContext);
114 }
115
116 public String getColumnName(int column) {
117 return headers[column];
118 }
119
120 public Class getColumnClass(int columnIndex) {
121 return columnClass[columnIndex];
122 }
123
124 public void setValueAt(Object value, int rowIndex, int columnIndex) {
125 Object item = list.get(rowIndex);
126 listContext.put(ITEM_VAR, item);
127 columns[columnIndex].setValue(getContext(), listContext, value);
128 }
129 }
130 } |
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