Managed Bean ( Concept ) / Calling a method in the AMImpl class from the Managed bean

Managed Bean : - It is a java class that is created in the view controller of the ADF application.
-> We can have one Managed bean for a task flow so that all the pages in the task flow can access that Managed bean.
-> In the over view of the task flow go to the managed bean and add the java class as a bean after we have created a java class in the view controller section of the application.
Note :- If we want to call a method in the backing bean from a page by setting it to a button action we have to add that method to the bindings of the page.

Call a method in the Application Module from the backing bean:-

import oracle.adf.model.binding.DCBindingContainer;

import oracle.adf.model.binding.DCIteratorBinding;

import oracle.binding.BindingContainer;

import javax.el.ELContext;

import javax.el.ExpressionFactory;

import javax.el.ValueExpression;

import javax.faces.application.Application;

import javax.faces.context.ExternalContext;

import javax.faces.context.FacesContext;

import oracle.binding.OperationBinding;

  FacesContext facesContext = FacesContext.getCurrentInstance();

  Application app = facesContext.getApplication();

  ExpressionFactory elFactory = app.getExpressionFactory();

  ELContext elContext = facesContext.getELContext();

  ValueExpression valueExp =

    elFactory.createValueExpression(elContext, "#{bindings}", Object.class);

  BindingContainer binding= (BindingContainer)valueExp.getValue(elContext);

  // createCurrentCustomerRow is the name of the method in the AMImpl class
  OperationBinding operationBinding=binding.getOperationBinding("createCurrentCustomerRow");

  // Set the Input parameters to the operation bindings as below

     operationBinding.getParamsMap().put("pCustomerID", "100");  

  // Invoke the Application module method

  operationBinding.execute();

  // Get the result from operation bindings

  Object obj =operationBinding.getResult();