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2016/01/28

aterai

Save and load the state of a JTable and TableColumn(name, width, position and sortKey)

Code

class DefaultTableModelPersistenceDelegate extends DefaultPersistenceDelegate {
  @Override protected void initialize(
        Class type, Object oldInstance, Object newInstance, Encoder encoder) {
    super.initialize(type, oldInstance,  newInstance, encoder);
    DefaultTableModel m = (DefaultTableModel) oldInstance;
    for (int row = 0; row < m.getRowCount(); row++) {
      for (int col = 0; col < m.getColumnCount(); col++) {
        Object[] o = new Object[] {m.getValueAt(row, col), row, col};
        encoder.writeStatement(new Statement(oldInstance, "setValueAt", o));
      }
    }
  }
}

File file = File.createTempFile("output", ".xml");
try (XMLEncoder xe = new XMLEncoder(new BufferedOutputStream(new FileOutputStream(file)))) {
  xe.setPersistenceDelegate(
    RowSorter.SortKey.class,
    new DefaultPersistenceDelegate(new String[] {"column", "sortOrder"}));
  xe.writeObject(table.getRowSorter().getSortKeys());
//...

class TableColumnModelPersistenceDelegate extends DefaultPersistenceDelegate {
  @Override protected void initialize(
      Class type, Object oldInstance, Object newInstance, Encoder encoder) {
    super.initialize(type, oldInstance, newInstance, encoder);
    DefaultTableColumnModel m = (DefaultTableColumnModel) oldInstance;
    for (int col = 0; col < m.getColumnCount(); col++) {
      Object[] o = {m.getColumn(col)};
      encoder.writeStatement(new Statement(oldInstance, "addColumn", o));
    }
  }
}

References