How to bind List of List in jsf datatable - jsf

Question

Hi I have a variable like
List<List<MyObject>> x = new ArrayList<List<MyObject>>();
I wanted this bind to a datatable in jsf which contains select
<datatable>
<column>
<Select/>
</column>
</datatable>
Is this possible in jsf
Code:
view.xhtml
<h:dataTable id="i1" value="#{bean.listoflist}" var="list1">
<h:column>
<h:selectOneListbox value="#{bean.somestring}" >
<f:selectItems value="#{list1.?}" var="any" itemValue="#{any.??}/>"
</h:selectOneListbox>
</h:column>
</h:dataTable>`
Bean.java (name = "bean")
public class Bean implements Serializable
{
List<List<MyObject>> listoflist = new ArrayList<List<MyObject>>()
//--------------Getters and Setter
}
MyObject.java
public class MyObject
{
private String s1;
private String s2;
//---------------getter and setter
}

Answer 1

If I understood your problem properly, you want to make a datatable of select elements whose options come form the nested list of your model. If yes, here is the solution:
prepare an array of selected elements per the size of the outer list;
have a converter for your model object;
fill the UI components accordingly.
Below you may find a working example:
<h:dataTable value="#{bean.listOfLists}" var="list" binding="#{table}" >
<h:column>
<h:selectOneListbox value="#{bean.selection[table.rowIndex]}" converter="myObjectConverter" >
<f:selectItems value="#{list}" var="obj" itemValue="#{obj}" itemLabel="#{obj.s1}" />
</h:selectOneListbox>
</h:column>
</h:dataTable>
with
MyObject[] selection = new MyObject[listOfLists.size()];