Can't refer to it

Question

Good day all,
In Jdev 11.1.1.5, after I’ve added this to the Page Def of the jsf
<parameters>
<parameter id="par_user" value="">
</parameter>
</parameters>
why do I encounter this
javax.el.ELException: java.lang.NullPointerException
when I try to refer to it in the bean like this?
AttributeBinding attr =
(AttributeBinding)bindings.getControlBinding("par_user");
Edited by: HuaMin on May 2, 2012 6:14 PM

Answer 1

Here is an example.
my page definition source is
<?xml version="1.0" encoding="UTF-8" ?>
<pageDefinition xmlns="http://xmlns.oracle.com/adfm/uimodel"
                version="11.1.1.56.60" id="untitled1PageDef"
                Package="view.pageDefs">
  <parameters>
    <parameter id="name" value="Mohammad Jabr"/>
  </parameters>
  <executables>
    <variableIterator id="variables"/>
  </executables>
  <bindings/>
</pageDefinition>my bean is
import java.util.Map;
import oracle.adf.model.BindingContext;
import oracle.adf.model.binding.DCBindingContainer;
import oracle.binding.BindingContainer;
public class Test {
    public Test() {
    public BindingContainer getBindings() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    public String getPageParamater() {
        // Add event code here...
        DCBindingContainer bc = (DCBindingContainer)this.getBindings();
        Map map = bc.getParametersMap();
        String name=map.get("name").toString();
        System.out.println("name param is " + name);
        return null;
}You need to assign a value for your par_user parameter.