I wrote this simple sorting function :
public void applyFilter(String filter, int col)
{
if(filter.length() == 0)
sorter.setRowFilter(null);
RowFilter<Object, Object> rf = null;
try
{
rf = RowFilter.regexFilter(filter, col);
}
catch (java.util.regex.PatternSyntaxException e)
{
return;
}
sorter.setRowFilter(rf);
refreshTable();
}
But then I realized I wanted to filter the table based on an id that I haven't shown to the view(So it doesn't have it's column). The java filter is based on a column, but how can I filter the table based on other attributes that aren't displayed? I can easily fetch the underlying object represented by the row and get the id, but how do I go about filtering based on that?
This is going to depend a lot on how your data is modeled, but basically you can write your own filter...
This is the filter implementation I've used in my example...
public class IDFilter extends RowFilter<MyModel, Integer> {
private int id;
public IDFilter(int id) {
this.id = id;
}
public boolean include(RowFilter.Entry<? extends MyModel, ? extends Integer> entry) {
MyModel personModel = entry.getModel();
RowValue value = personModel.getValueAt(entry.getIdentifier());
if (value.getId() == id) {
return true;
}
return false;
}
}
Here is a example of it running...
public class TestTableFilter {
public static void main(String[] args) {
new TestTableFilter();
}
public TestTableFilter() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new FilterPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class FilterPane extends JPanel {
private JTable table;
private int filter;
private TableRowSorter<MyModel> sorter;
public FilterPane() {
setLayout(new BorderLayout());
MyModel model = new MyModel();
sorter = new TableRowSorter<MyModel>(model);
table = new JTable(model);
table.setRowSorter(sorter);
add(new JScrollPane(table));
JButton filterButton = new JButton("Filter");
filterButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
filter++;
System.out.println(filter);
RowFilter<MyModel, Integer> rowFilter = null;
switch (filter) {
case 1:
rowFilter = new IDFilter(0);
break;
case 2:
rowFilter = new IDFilter(1);
break;
default:
filter = 0;
}
sorter.setRowFilter(rowFilter);
}
});
add(filterButton, BorderLayout.SOUTH);
}
}
public class MyModel extends AbstractTableModel {
private List<RowValue> values;
public MyModel() {
values = new ArrayList<>(25);
for (int index = 0; index < 10; index++) {
values.add(new RowValue(index % 2, Character.toString((char) (65 + index)), index));
}
}
@Override
public int getRowCount() {
return values.size();
}
@Override
public int getColumnCount() {
return 2;
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
RowValue row = values.get(rowIndex);
Object value = null;
switch (columnIndex) {
case 0:
value = row.getName();
break;
case 1:
value = row.getValue();
break;
}
return value;
}
public RowValue getValueAt(int row) {
return values.get(row);
}
}
public class RowValue {
private int id;
private String name;
private int value;
public RowValue(int id, String name, int value) {
this.id = id;
this.name = name;
this.value = value;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public int getValue() {
return value;
}
}
public class IDFilter extends RowFilter<MyModel, Integer> {
private int id;
public IDFilter(int id) {
this.id = id;
}
public boolean include(RowFilter.Entry<? extends MyModel, ? extends Integer> entry) {
MyModel personModel = entry.getModel();
RowValue value = personModel.getValueAt(entry.getIdentifier());
if (value.getId() == id) {
return true;
}
return false;
}
}
}
