How to implement row numbering into h:dataTable

Question

I have this JSF table with pagination.

Answer 1

Im not sure I understand correctly. You just want the rows numbered?

However, I don't think it's as easy as you might think it is. h:dataTable actually doesn't support this. And mixing h:dataTable and ui:repeat seems like the completely wrong way to do this (if I understand correctly).

You could:

• Use t:dataTable (from Tomahawk: http://myfaces.apache.org/tomahawk/index.html). There you can use the rowIndexVar Attribute, like so:

  <t:dataTable rowIndexVar="row" value="#{someBean.value}">  
      <h:column>  
          <h:outputText value="#{row + 1}"/>  
      </h:column>  
  </t:dataTable>
  

• Alternativly, change your data model and provide the index inside there. Or use a wrapper class:

  public class DataWrapper{
      private int index;
      private Object model;
      // getter and setter
      ...
  }
  

  Then pass a list of DataWrapper to JSF, instead of your model directly. You need to set the index somewhere in your service layer first, of course.

I hope this helps. Let me know if you need further assistance.

Answer 2

Use UIData#getRowIndex().

<h:dataTable binding="#{table}" ...>
    <h:column>
        #{table.rowIndex + SessionsController.firstRow + 1}
    </h:column>
    ...
</h:dataTable>