Generating dynamic command links in data table

Hi,
I have a requirement to generate dynamic number of columns in a datatable. Also these columns should contain a command link.
I have written following piece of code to do so...
public UIData getDataTableBinding()
     UICommand comm = null;
     UIColumn col;
     UIOutput out = null;
     Application app = app = FacesContext.getCurrentInstance().getApplication();
// Suppose I want to generate 7 columns
     for(int j = 0; j < 7; ++j) {
     out = new UIOutput();
     col = new UIColumn();
     comm = new UICommand();
     ValueBinding vb = app.createValueBinding("#{" + j + "}");
     out.setValueBinding("value", vb);
     out.setRendererType("javax.faces.Text");
     comm.setRendererType("javax.faces.Link");
comm.getChildren().add(out);
     MethodBinding mbButton = app.createMethodBinding("#{pc_File1.doLink1Action}",
null);
     comm.setAction(mbButton);
     col.getChildren().add(comm);
     dataTableTemp.getChildren().add(col);
     return dataTableTemp;
I have bound the "binding" attribute of the data table to getDataTableBinding()
method.
If I remove all the references to UICommand i.e comm variable, table is displayed properly, but if
I try to include a command link component as mentioned above I get "Assertion failed error"
SRVE0068E: Could not invoke the service() method on servlet Faces Servlet. Exception thrown :
javax.servlet.ServletException: javax.faces.el.EvaluationException: Error getting property
'dataTableBinding' from bean of type pagecode.File1: javax.faces.FacesException: Assertion Failed
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:638)
     at com.ibm._jsp._File1._jspService(_File1.java:92)
     at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:88)
Any kind of help on this issue would be appreciated,
Thanks in advance,
Raina

Hi,
I solved my problem just by replacing UIOutput component with HtmlOutputText component and then making it as a child component of UICommand component.
Now I am facing a new problem. Whenever I try to refresh the page I get following exception
"SRVE0026E: [Servlet Error]-[Faces Servlet]: java.lang.IllegalStateException: Duplicate component ID 'form1:table1:cmd0' found in view."
I am explicitly setting the component id of the UICommand component using the setViewId() method.
This problem is observed only when I refresh the page. In case I navigate to another page and then again come back to this current page, then I don't get this exception.
Your help would be appreciated,
Raina

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