Sorting a bound JTable

Question

I posted a question about this a week or so ago and it was determined that I needed to override some methods in JUTableSortModel. I'm posting again because I'm at a loss for which methods to override. I do have a method of sorting in mind.
My problem was that once a header is clicked in a JClient table, selection of rows is disabled. It was determined that Oracle simply didn't feel like implementing this, so I would need to extend their JUTableSortModel. My plan is to listen for clicks on the table, find out which header it was on, and add that header's name to the OrderBy clause of the view object. Should I override addMouseListenerToHeaderInTable in the TableSortModel class, or simply add a mouse listener to the table itself in my UI?

Answer 1

spaist - thanks for posting your code. I found it very helpful. Here's generalized version that can be used with any ADF-bound JTable.
Note that like your code we toggle back and forth between DESC and ASC. If you double click a column sorting is turned off (but I haven't specialized the double click listener so the query actually gets executed twice for double clicks).
If someone out there wants to expand this and make a nice little Strategy pattern that's easier to implement please post your code.
import com.sun.java.util.collections.ArrayList;
import com.sun.java.util.collections.Iterator;
import java.awt.Event;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.table.TableColumnModel;
import oracle.jbo.AttributeDef;
import oracle.jbo.AttributeHints;
import oracle.jbo.LocaleContext;
import oracle.jbo.ViewObject;
import oracle.jbo.common.DefLocaleContext;
public class TableHeaderSortListener extends MouseAdapter
  private ViewObject vo;
  private TableColumnModel tcm;
  private ArrayList sortList;
  private String orderBy = "";
  private LocaleContext locale;
  public TableHeaderSortListener(ViewObject v, TableColumnModel cm)
    sortList = new ArrayList();
    locale =  new DefLocaleContext();
    vo = v;
    tcm = cm;
  public void mouseClicked(MouseEvent e)
    String columnName = (String)tcm.getColumn(tcm.getColumnIndexAtX(e.getX())).getHeaderValue();
    AttributeDef[] ad = vo.getAttributeDefs();
    String sSortList = "";
    for (int j = 0; j < ad.length; j++)
      AttributeHints ah = ad[j].getUIHelper();
      if (columnName.equals(ah.getLabel(locale)))
        orderBy = ad[j].getColumnName();
        if (!sortList.isEmpty())
          if (sortList.contains(orderBy))
            sortList.remove(orderBy);
            orderBy += " DESC";                       
          } else if (sortList.contains(orderBy + " DESC"))
            sortList.remove(orderBy + " DESC");
        sortList.add(orderBy.toUpperCase());
        break;
    if (e.getClickCount() > 1)
      sortList.remove(orderBy.toUpperCase());
    if (sortList.size()>1) {
      sSortList = join(sortList, ","); 
    } else if (sortList.size()>0)
      sSortList = sortList.get(0).toString();
    // Last little check
    if (sortList.size() > 0)
      vo.setOrderByClause(sSortList);     
    } else
      vo.setOrderByClause(null);
    vo.executeQuery();
   * Join()
   * Similar to the Perl function
   * @return String
   * @param token
   * @param st
  public String join(ArrayList st, String token)
    StringBuffer sb = new StringBuffer();
    Iterator it = st.iterator();
    while (it.hasNext())
      sb.append(it.next() + token);
    sb.replace(sb.length()-1, sb.length(), "");
    return sb.toString();
}You can import this into classes which contain JTables and refer to it as follows (first you have to follow Frank's advice and turn off the default JUTableSortModel)
jbinit(){
    removeTableHeaderMouseListeners();
    TableHeaderSortListener ths = new TableHeaderSortListener(panelBinding.findIterBinding("<YOUR_ITERATOR>").getViewObject(), <YOUR_TABLE>.getColumnModel());
    <YOUR_TABLE>.getTableHeader().addMouseListener(ths);
   public void removeTableHeaderMouseListeners()
        MouseListener[] ml = <YOUR_TABLE>.getTableHeader().getMouseListeners();
    for (int j = 0; j < ml.length; j++)
        // Note - the name of your JUTableSortModel may be slightly differnet
        if (ml[j].getClass().toString().indexOf("oracle.jbo.uicli.jui.JUTableSortModel$1")>-1)
        <YOUR_TABLE>.getTableHeader().removeMouseListener(ml[j]);
  }