Application Module instance not found in task flow

Question

Hi,
i am working on Oracle Jdeveloper 11g Release 1
I have created a bounded task flow for with following properties:
<transaction id="__14">
      <new-transaction/>
    </transaction>
    <data-control-scope id="__15">
      <shared/>
    </data-control-scope>
    <task-flow-reentry id="__13">
      <reentry-not-allowed/>
    </task-flow-reentry>I have declared a page flow scope bean in the task flow as:
<managed-bean id="__5">
      <managed-bean-name id="__6">trainBean</managed-bean-name>
      <managed-bean-class id="__8">oracle.sysman.core.gccompliance.view.library.rule.patchRule.PatchRuleTrainBean</managed-bean-class>
      <managed-bean-scope id="__7">pageFlow</managed-bean-scope>
    </managed-bean>but when i am trying to access the AM Impl instance from bean methos as below:
public static final String DATA_CONTROLLER = "ComplianceLibraryAMDataControl";
    public ComplianceLibraryAMImpl getDataControl() {
        DCBindingContainer bc =
            (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
        ApplicationModule am = bc.findDataControl(DATA_CONTROLLER).getApplicationModule();
        return (ComplianceLibraryAMImpl)am;
    }I am getting null pointer exception in ApplicationModule am = bc.findDataControl(DATA_CONTROLLER).getApplicationModule();
I am using the same way to get bean in other task flows as well , so i think the code to get bean is working correctly.
What am i missing in this?

Answer 1

thanks Puthanampatti ,
This is working and i am able to get AM instance from this , But i am not sure what is the difference between:
public ComplianceLibraryAMImpl getComplianceLibraryAM() {
ComplianceLibraryAMImpl am = (ComplianceLibraryAMImpl)ADFUtils.getApplicationModuleForDataControl("ComplianceLibraryAMDataControl");
return am;
Referred methods:
     * Get application module for an application module data control by name.
     * @param name application module data control name
     * @return ApplicationModule
    public static ApplicationModule getApplicationModuleForDataControl(String name)
        return (ApplicationModule) JSFUtils.resolveExpression("#{data." +  name +  ".dataProvider}");
     * Method for taking a reference to a JSF binding expression and returning
     * the matching object (or creating it).
     * @param expression EL expression
     * @return Managed object
    public static Object resolveExpression(String expression) {
        FacesContext facesContext = getFacesContext();
        Application app = facesContext.getApplication();
        ExpressionFactory elFactory = app.getExpressionFactory();
        ELContext elContext = facesContext.getELContext();
        ValueExpression valueExp =
            elFactory.createValueExpression(elContext, expression,
                                            Object.class);
        return valueExp.getValue(elContext);
    }And my previous approach:
    public ComplianceLibraryAMImpl getDataControl() {
                 DCBindingContainer bc = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry();
                 ApplicationModule am = bc.findDataControl(DATA_CONTROLLER).getApplicationModule();
                 return (ComplianceLibraryAMImpl)am;
    }Why am i not able to find my data control AM from Binding Container????