Tableview model

Question

Hi guys...
I'm trying to show a TableView in HTMLB, but I get the following execption :
I debugged the JSPDynpage and I do get the data succesfully from the data base.
I think the problem is when the tableview tries to get the model. I am not sure, because I'm new to PAR development.
Could you please help me?
Thank you.
The Exception is :
Date : 06/08/2008
Time : 19:01:26:438
Message : null
[EXCEPTION]
java.lang.ClassCastException
     at com.sapportals.htmlb.table.DefaultTableViewModel.getValueAt(DefaultTableViewModel.java:186)
     at com.sapportals.htmlb.table.DefaultTableViewModel.getValueAt(DefaultTableViewModel.java:196)
     at com.sapportals.htmlb.table.TableColumn.getValueAt(TableColumn.java:478)
     at com.sapportals.htmlb.table.DefaultCellRenderer.renderCell(DefaultCellRenderer.java:275)
     at com.sapportals.htmlb.unifiedrendering.ie5.TableViewRenderer.renderTableViewCellFragment(TableViewRenderer.java:2504)
     at com.sapportals.htmlb.unifiedrendering.ie5.TableViewRenderer.renderTableViewRowFragment(TableViewRenderer.java:1792)
     at com.sapportals.htmlb.unifiedrendering.ie5.TableViewRenderer.renderTableViewFragment(TableViewRenderer.java:500)
     at com.sapportals.htmlb.unifiedrendering.ie5.TableViewRenderer.render(TableViewRenderer.java:99)
     at com.sapportals.htmlb.rendering.PageContext.render(PageContext.java:983)
     at com.sapportals.htmlb.taglib.TableViewTag.doEndTag(TableViewTag.java:139)
     at pagelet._sapportalsjsp_ReporteVisita.subDoContent(_sapportalsjsp_ReporteVisita.java:190)
     at pagelet._sapportalsjsp_ReporteVisita.doContent(_sapportalsjsp_ReporteVisita.java:40)
     at pagelet._sapportalsjsp_ReporteVisita.service(_sapportalsjsp_ReporteVisita.java:24)
My code is :
JSPDynPage
public static class JSPDynPageReporteVisitaDynPage extends JSPDynPage{
    public TablaReporteModel myBean = null;
    public void doInitialization(){
          Vector vectData = new Vector();
          Vector vectColumn = new Vector();
          try
             java.sql.Connection conn;
             com.indelpro.bd.SQLConnection sqlConn = new com.indelpro.bd.SQLConnection();
             conn = sqlConn.getConnection();
             BdReporteDeVisitaPorProducto bdReporteDeVisitaPorProducto = new BdReporteDeVisitaPorProducto(conn);
             vectData = bdReporteDeVisitaPorProducto.obtenerReporteDeVisitasPorProducto();
             conn.close();
             conn = null;
        catch (java.lang.SecurityException e)   {e.printStackTrace(); }
        catch (java.lang.NullPointerException e)  {e.printStackTrace();}
        catch (java.sql.SQLException e) { e.printStackTrace(); }
        catch (javax.naming.NamingException e)  {e.printStackTrace(); }                         
        catch (java.lang.ClassNotFoundException e) {      e.printStackTrace();       }
        catch (java.lang.IllegalAccessException e)  {e.printStackTrace();  }
        catch (java.lang.InstantiationException e)  {e.printStackTrace();        }
        catch (java.lang.Exception e)  {e.printStackTrace();        }
        IPortalComponentSession componentSession = ((IPortalComponentRequest)getRequest()).getComponentSession();
       myBean = new TablaReporteModel(vectData);
        componentSession.putValue("myBean",myBean);
My JSP is :
<%@ taglib uri= "tagLib" prefix="hbj" %>
<jsp:useBean id="myBean" scope="session" class="bean.TablaReporteModel" />
</jsp:fallback>
<hbj:content id="myContext" >
  <hbj:page title="PageTitle">
   <hbj:form id="myFormId" >
<hbj:tableView
           id="myTableView1"
           model="myBean.model"
           design="ALTERNATING"
           headerVisible="true"
           footerVisible="true"
           fillUpEmptyRows="true"
           navigationMode="BYLINE"
           selectionMode="SINGLESELECT"
           headerText="Visitas a Productos"
           visibleFirstRow="1"
           visibleRowCount="20"
           rowCount="20"
           width="600 px"/>            
   </hbj:form>
  </hbj:page>
</hbj:content>
An the Bean class is :
public class TablaReporteModel  extends DefaultTableViewModel implements Serializable   {
     private DefaultTableViewModel  model;
        public TablaReporteModel()
             super();
             model = new DefaultTableViewModel();
          public TablaReporteModel(Vector vRepVisita)
               Vector colName = new Vector();
               Vector retVector = new Vector();
               colName.addElement("Usuario");ja
               colName.addElement("Familia");
               colName.addElement("Producto");
               colName.addElement("Visitas");
               Vector dataVect = null;
               ReporteDeVisitaPorProducto reporte = null;
               for (int i=0;i<vRepVisita.size();i++)
                     dataVect = new Vector();
                     reporte = new ReporteDeVisitaPorProducto((ReporteDeVisitaPorProducto) vRepVisita.elementAt(i));
                     dataVect.addElement(reporte.getCodUsuario());
                     dataVect.addElement(reporte.getCodTiProducto());
                     dataVect.addElement(reporte.getCodProducto());
                     dataVect.addElement(new Integer(reporte.getCanVisita()));
                     retVector.addElement(dataVect);     
               this.model = new DefaultTableViewModel (colName, retVector);
          public DefaultTableViewModel getModel()
             return this.model;

Answer 1

I solved it and report the bug for others:
In the constructor of the DefaultTableViewModel of the above example the data vector is the first argument and the column name vector the 2nd. This was turned around and the implementation tried to cast the Strings in the column name vector to Vectors for rows.
Hope this will be improved by a type safe API sometimes...
kind regards,
Achim