Managed Bean property value not rendered during Render Response Phase

Question

I am not able to figure out what I am doing wrong. Request your inputs. Please.

I have a request scoped managed bean , which has a List of which I render as a datatable in my JSF 1.2 Apache my faces application. When I submit the form , and since there are some server side validations that fails, I add a FacesMessage and show the same JSF page.

In this request-response cycle , In the INVOKE-APPLICATION Phase , I am able to see the values of the List of but the when the page is rendered with the FacesMessage, the datatable is empty.

The other bean-properties and their values are retained in this request-response cycle except for this List / Datatable.

This is how the datatable is constructed in the action method - initial request

    if(getInputXMLString() != null 
            && getInputXMLString().length() >0)
    {
    List<NodeDetailsVO> nodes = Utility.inputXMLStringNodeDetailsVO(getInputXMLString());
        setSelectedNodes(nodes);
    }

When I try the same as above in the postback request (inside the other action method),It works okay.When I add my business Logic inside a private method, and If I call it above this code or after this, It doesn't work.I am only using the getter of the List in the private method. And in the getter method - I only have sysouts inside if and else.

This is how the datatable is rendered in the xhtml page:

<h:dataTable width="80%" cellspacing="0" border="1" 
            id="nodes_datatable" cellpadding="2" 
            style="border-collapse:collapse;"
            value="#{createBean.selectedNodes}"
            binding="#{createBean.selectedNodesHTMLDataTable}"
            var="aResult"
            columnClasses="columnAlignRight,columnAlignLeft"
            >

Answer 1

This is not the normal case. I do see only two possible causes:

1. The datamodel (the List as you calls it) is been reset somehow. Probably the getter method is doing more than only returning the datamodel and has reloaded it, but some requestbased parameter/condition is missing.

2. The datatable or one of its parent components has a rendered attribute which evaluated false.