Hai everyone,

In a page with details for many products, I display the product name with its price information by using the data Table components.

The columns used for the details of any product are sortable by design. Then I have one more dynamic column “EMIâ€Â� – Equated Monthly Installment. It is not from entity bean but it is computed in session bean and by default the EMI is for 1 year.

In this page the user can also select payment period by using a drop down and when the EMI period is changed like this, I compute the new EMI value and then display it in the data table.

And by design, EMI column should also be sortable. I wish to know if this is possible through any Richface component.

This is my sample xhtml code:

<h:selectOneMenu value="#{store.emiPerid}" >
<f:selectItems value="#{emiPeridItems}"/>
<a4j:support event="onchange" actionListener="#{store.updateEmi}" />
</h:selectOneMenu >

<rich:dataTable value="#{StoreList}" var="cap" >
 <rich:column sortBy="#{cap.productName}">
 <f:facet name="header">
 <h:outputText value="Product Name"/>
 </f:facet>
 <h:outputText value="#{cap.productName }"/>
 </rich:column>
 <rich:column sortBy="#{cap.price}">
 <f:facet name="header">
 <h:outputText value="Price"/>
 </f:facet>
 <h:outputText value="#{cap.price}"/>
 </rich:column>
 <rich:column>
 <f:facet name="header">
 <h:outputText value="EMI"/>
 </f:facet>
 <h:outputText value="#{StoreEmiMap[cap]}"/>
 </rich:column>
 </rich:dataTable>

This is my session bean code

@Name("store")
public class StoreAction implements Store, Serializable
{

 @Out(required=false)
 List<TblStore> StoreList;

 double emiPerid;

@Out(required=false)
List<SelectItem> emiPeridItems


 @Out(required=false)
 Map<TblStore, double> StoreEmiMap;

 @Begin(join=true)
 public String beginAction() {
 emiPeridItems=new List<SelectItem>();

for(int 1=1;i<10;i++)
 emiPeridItems.add(new SelectItem(i+"Years",i));

 StoreList= =em.createQuery("select t from TblStore t ").getResultList();

 StoreEmiMap =new HashMap<TblStore, double>();

 For(TblStore a: StoreList)
StoreEmiMap.put(a, emi for one year by default);
 }

 public void updateEmi(ActionEvent event)
{
 //Compute the new EMI.
 //Update the computed new EMI values to the HashMap
}
}

If the EMI is brought from the entity bean then there is no issue and the column can also be sorted.
But it is a computed value. So I wish to know how it can be made sortable.

Any one can help me out on this, Please?

by
Thiagu.m