Skip to main content

ADF Utility : Find UIComponent from Managed Bean

Many a times, it is required to find an UIComponent from ADF managed bean, to do something with it, for example : change the value of an af:outputText, change readOnly property of an af:inputText etc.

    private UIComponent getUIComponent(String id) { 
       
        FacesContext facesCtx = FacesContext.getCurrentInstance(); 
        return findComponent(facesCtx.getViewRoot(), id);
    } 
   
    private UIComponent findComponent(UIComponent base, String id) {
       
        if (id.equals(base.getId())) {
            return base;
        }

        UIComponent children = null;
        UIComponent result = null;
        Iterator childrens = base.getFacetsAndChildren();
        while (childrens.hasNext() && (result == null)) {
            children = (UIComponent)childrens.next();
            if (id.equals(children.getId())) {
                result = children;
                break;
            }
            result = findComponent(children, id);
            if (result != null) {
                break;
            }
        }
        return result;
    }


This will search from the UI view root for all elements until it finds the UIComponent of the same ID.

NOTE : This is widely available in ADF community, I just wanted to make this available for those we are only looking for this utility.

Comments

Popular posts from this blog

Chatbots and Oracle Cloud Services

Thanks to Oracle A-Team, I had a chance to work with Chatbots.
3 pure NodeJS applications, on couple of Oracle Cloud platforms and Facebook messenger, and my chatbot was running.

Let me explain, the architecture a bit. To start with, following is the simple representation of how it works.

Secure your Node/Express REST APIs using Passport JS

Recently I have been involved in various discussions on how to make the REST APIs as secure as SOAP.
First of all, let me start with a very basic statement, about security, it doesn't depend on your Webservice type, be it REST or SOAP, your design decisions depicts whether they can be made secure or not.
In this example blog, I will use "Micro CRUD services for Oracle Database Cloud" APIs and implement (read attach) Passport's "local" authentication strategy, to make them secure.

Code in Github : LeasifyAPIs with Passport

What is Passport JS? (from Documentation)

Passport is authentication middleware for Node. It is designed to serve a singular purpose: authenticate requests. When writing modules, encapsulation is a virtue, so Passport delegates all other functionality to the application. This separation of concerns keeps code clean and maintainable, and makes Passport extremely easy to integrate into an application.

What are "strategies" in P…

Exception Handling in ADF

This blog will give you an overview on how you can successfully deal with unhandled Runtime exceptions in an ADF application.

This will give you an idea of:
How to catch the unhandled exceptions.Write a separate log file with stacktrace and thread dumps.Redirect the user to an static error page
#1. Catch unhandled exceptions : 

Create a class "MyExceptionHandler" which extends : oracle.adf.view.rich.context.ExceptionHandler. Override handleException() method.

public void handleException(FacesContext facesContext, Throwable throwable, PhaseId phaseId) throws Throwable {
        // this method is going to create a separate file with stacktrace and thread dumps
        writeException(throwable);
        // redirect to error page
        redirectToErrorPage(facesContext);
    }

 Create a folder "services" inside : ViewController\src\META-INF and then create a file named "oracle.adf.view.rich.context.ExceptionHandler".
In the file, add the absolute name of your custom e…