Apply Validator to programmatically created ADF Faces components

Sharing is Caring

Again a post in series of  Working with ADF Faces Components programmatically
Previously i have posted about Getting value , Applying Action Listener , Applying Client/Server Listener, Creating and applying client Attributes, Setting value expression  to programmatically created component
Now this post post is about applying Validator to a component that is created at run time
See how to do this (Jdev 12.1.3)-

    • First created a FusionWebApplication and a page in viewController project
    • Dropped a button on page , on this button action i will create an inputText programmatically and assign validator method reference to it
    • To create new inputText i have added following code (described in previous post)

/**Method to add dynamically created component to a parent layout
     * @param parentUIComponent
     * @param childUIComponent
     */
    public void addComponent(UIComponent parentUIComponent, UIComponent childUIComponent) {
        parentUIComponent.getChildren().add(childUIComponent);
        AdfFacesContext.getCurrentInstance().addPartialTarget(parentUIComponent);
    }

        //Code to create af:inputText and add it to panelgroup layout
        RichInputText ui = new RichInputText();
        ui.setId("pit1");
        ui.setContentStyle("width:200px;color:navy");
        //getParentGroupLayoutBind is the component binding of parent panel group layout
        addComponent(getParentGroupLayoutBind(), ui);
    • Next step is to create a validator method in managed bean to validate this inputText value, So i have created a validator method in managed bean that will check that inputText value should not be greater than 100

    /**Validator method to be applied on programmatically created inputText
     * @param facesContext
     * @param uIComponent
     * @param object
     */
    public void testValidator(FacesContext facesContext, UIComponent uIComponent, Object object) {
        if (object != null) {
            Integer val = Integer.parseInt(object.toString());
            if (val > 100) {
                throw new ValidatorException(new FacesMessage("Invalid Value","Must be less than 100"));
            }
        }
    }
    • Now assign this validator method to programmatically created inputText, see how to do this
      Helper method to resolve Validator (import javax.faces.validator.Validator)

//Packages used

import javax.el.ELContext;
import javax.el.ExpressionFactory;
import javax.faces.application.Application;
import javax.el.MethodExpression;
import javax.faces.context.FacesContext;
import javax.faces.component.UIComponent;
import javax.faces.validator.MethodExpressionValidator;

/**Method to to resolve Validator method
* @param actionName
*/
private Validator resolveValidator(String validatorName) {
//Validator method takes 3 argument of following type , we have to define that
Class[] argtypes = new Class[3];
argtypes[0] = FacesContext.class;
argtypes[1] = UIComponent.class;
argtypes[2] = Object.class;
FacesContext facesCtx = FacesContext.getCurrentInstance();
Application app = facesCtx.getApplication();
ExpressionFactory elFactory = app.getExpressionFactory();
ELContext elContext = facesCtx.getELContext();
MethodExpression methodExp = elFactory.createMethodExpression(elContext, validatorName, null, argtypes);
return new MethodExpressionValidator(methodExp);
}

To apply this validator to inputText just write this – Pass exact el reference of bean validator method to resolveValidator method

//Pass string that contains proper el reference of Validator method 
ui.addValidator(resolveValidator("#{viewScope.Testbean.testValidator}"));
  • All done 🙂 Run and check application , On button click an inputText is created, i have entered a value greater than 100 and see the result

 

Cheers:) Happy Learning

Related Posts

An Oracle ACE, Blogger, Reviewer, Technical Lead working on Oracle ADF

0 thoughts on “Apply Validator to programmatically created ADF Faces components”

  1. Hello thanks for sharing.
    I am currently trying to remove that popup (tooltip) that arises as the validation exception is thrown, how can I do that?
    Thanks in advance for any help!

  2. Tahanks for your answer..
    I want to show the validation error message just as you do, throwing a validation exception, but after I throw it and I see the popup error message in the richinputtext I need to be able to remove that popup from showing up, so that the user cant see it no more, but I haven't been able to do so, what can I do to make the popup disappear ?

  3. I added a listener to another UIcomponent (lets call it C2) and if this other component (C2) changes its value I need the richinputtext to stop displaying the popup from the validation exception, I tried reseting the value of the richinputtext in the changelistener of the component C2 but it wouldn't work. It was fixed by adding the richinputtext as a partial target for the change listener of C2 after doing a resetValue() on the richinputtext.
    Thanks for your help and for this blog, I have found it very usefull.

Leave a Reply

Your email address will not be published. Required fields are marked *