JUComboBox LOV Binding Issue

Question

Hi,
I am getting a problem in JUComboBoxLovBinding.
Problem Description --
I have created a JComboBox with used LovBinding (using two view objects -- resortVO and testVO ). The _resortVO is the LOV VO instance.
There is one button which rollbacks the transaction and create a new row for the non-lov view object instance.
I followed the following steps -->
1. Run the application
2. Press the Button.
3. Select an item (say 'ResortA') from the combo box
This sets the ResortId for the _testVO's current row.
4. Again press the Button
5. Then select the same item again i.e. ResortA.
This does not set the ResortId for teh _testVO's current row.
Question -- Why the ResortId is not get selected in Step 5?
The sample code is here --
package testapp;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Hashtable;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import oracle.jbo.ApplicationModule;
import oracle.jbo.AttributeDef;
import oracle.jbo.Row;
import oracle.jbo.ViewObject;
import oracle.jbo.client.Configuration;
import oracle.jbo.uicli.binding.JUApplication;
import oracle.jbo.uicli.jui.JUComboBoxBinding;
import oracle.jbo.uicli.jui.JUPanelBinding;
public class TestJUComboLovBinding extends JFrame
    private BorderLayout _mainLayout = new BorderLayout();
    private JPanel _panelCenter = new JPanel();
    private JUPanelBinding _panelBinding;
    /**  ADD CUSTOM MEMBER VARIABLES HERE  **/
    private JComboBox _resortComboBox = new JComboBox();
    private ViewObject _resortVO,_testVO;
    private JButton _createButton = new JButton("Create");
    private int count = 0;
    /** CUSTOM MEMBER VARIABLES ENDS HERE  **/
    public TestJUComboLovBinding()
        try
            jbInit();
        } catch (Exception e)
            e.printStackTrace();
    private void jbInit() throws Exception
        this.setSize(350, 210);
        this.setBounds( new Rectangle(100, 80, 400, 250));
        this.setTitle( "Frame Title" );
        ApplicationModule appModule =
            Configuration.createRootApplicationModule(
            "testapp.TestAppModuleImpl", "TestAppModuleLocal");
        JUApplication app = new JUApplication(appModule);
        _panelBinding = new JUPanelBinding(app.getName(), null);
        _panelBinding.setApplication(app);
        _panelCenter.setLayout(_mainLayout);
        customJbInit();
        this.getContentPane().add("Center",_panelCenter);
        _panelBinding.executeIfNeeded();
    private void customJbInit()
        _resortVO = _panelBinding.getApplicationModule().findViewObject("VResort");
        _testVO = _panelBinding.getApplicationModule().findViewObject("VTest");
        AttributeDef[] attrDefs = _resortVO.getAttributeDefs();
        String[] allAttrNames = new String[attrDefs.length];
        for (int i = 0; i < attrDefs.length; i++)
            allAttrNames[i] = attrDefs.getName();
_resortComboBox.setModel(
JUComboBoxBinding.createLovBinding
_panelBinding,
_resortComboBox,
_testVO.getName(),
null,
testVO.getName().replace('.','') + "IterBinding",
new String[] {"ResortId"},
_resortVO.getName(),
new String[] {"ResortId"},
allAttrNames,
null,
null
_resortComboBox.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e ){
if(_testVO != null && _testVO.getCurrentRow() != null)
System.out.println("Resort ID -- > " + count++ + ":" + _testVO.getCurrentRow().getAttribute("ResortId"));
_createButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
_panelBinding.getApplicationModule().getTransaction().rollback();
_testVO.executeQuery();
Row row = _testVO.createRow();
_testVO.insertRow(row);
panelCenter.add(resortComboBox,BorderLayout.NORTH);
panelCenter.add(createButton,BorderLayout.SOUTH);
public static void main(String[] args)
TestJUComboLovBinding frame = new TestJUComboLovBinding();
frame.addWindowListener(
new WindowAdapter()
public void windowClosing(WindowEvent evnt)
System.exit(0);
frame.setSize(new Dimension(400, 280));
frame.pack();
frame.setVisible(true);
Thanks.

Answer 1

Okay. So it's not the rollback.
Reading your posting one more time, I see that in point 5 you write:
"Then select the same item again".
The problem does not occur when a different item is selected? If that's the case, then it's probably some kind of optimization in the binding that only sets the value when it actually changes.
You could try to do something like that:
        _createButton.addActionListener(
            new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    _panelBinding.getApplicationModule().getTransaction().rollback();
                    _testVO.executeQuery();
                    Row row = _testVO.createRow();
                    _testVO.insertRow(row);
                   // New line to insert:
                    _resortVO.reset();
        );This should ensure that a navigation happens.
You can get the binding from the JUPanelBinding if your main application has access to that. See the getControlBinding() and findControlBinding() methods in JUFormBinding (a super class of JUPanelBinding).
Sascha