Custom Validator in Oracle ADF (JSF Validator), Email Validation Using Regex

Validation is very important part of any programming language, when we visit any website's registration form it says "This field is mandatory" or "Email id is not valid","Password doesn't match", these all are validations

What is a Validator-
A computer program or piece of code that checks syntax or value of any field according to a predefined condition is called Validator
Validators are used in every programming/scripting language.

How to Use Custom Validator in ADF Forms-
This is not complex to use validator in ADF forms, means in .jsff or in .jspx pages. Suppose we have a field of EmailId on form and we want to add custom email id validator on this field

To add validator in a field follow these steps

• Select the field in Form

•  Now go to property inspector and Select Validator,it is empty by default

• Now click on Validator edit in property inspector and create a validator in ManagedBean of taskflow

 

• It will look like this- Default Custom Validator 

•  Now we will add custom code to validate EmailId field in this validator

1.     public void emailValidator(FacesContext facesContext, UIComponent uIComponent, Object object) {
2.         if(object!=null){
3.             String name=object.toString();
4.             String expression="^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$";
5.             CharSequence inputStr=name;
6.             Pattern pattern=Pattern.compile(expression);
7.             Matcher matcher=pattern.matcher(inputStr);
8.             String msg="Email is not in Proper Format";
9.             if(matcher.matches()){
10.                
11.             }
12.             else{
13.                 throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR,msg,null));
14.             }
15.         }
16.     }

• Now when we run this page, we can see validation

PopUp component in Oracle ADF, Use showPopUpBehavior/JavaScript to show PopUp

In this tutorial we will see that how to deal with PopUp component in Oracle ADF.
Suppose we want to show popUp on any button click or on any other action, then there is 2 way to do this.

First one is-

1. Drag a PopUp component on page from Component Pallette

2. Now Drag a Button on page and drag af:showPopupBehavior under the button

3.Select af:showPopupBehavior at page structure and go to property Inspector and pass tha popUp id and trigger type of Popup that you want to show on button click.

  

5. Now run your page and click on Button and you will able to see Popup

Second One is-



In this you have to do some code in Managed Bean, you have to call a method on button click to show Popup

Method to show Popup-

    private void showPopup(RichPopup pop, boolean visible) {
        try {
            FacesContext context = FacesContext.getCurrentInstance();
            if (context != null && pop != null) {
                String popupId = pop.getClientId(context);
                if (popupId != null) {
                    StringBuilder script = new StringBuilder();
                    script.append("var popup = AdfPage.PAGE.findComponent('").append(popupId).append("'); ");
                    if (visible) {
                        script.append("if (!popup.isPopupVisible()) { ").append("popup.show();}");
                    } else {
                        script.append("if (popup.isPopupVisible()) { ").append("popup.hide();}");
                    }
                    ExtendedRenderKitService erks =
                        Service.getService(context.getRenderKit(), ExtendedRenderKitService.class);
                    erks.addScript(context, script.toString());
                }
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

Now we call it on button click, and pass the binding of Popup in it
as we have Popup with binding AddPop then on Button click we call this method as

1. showPopup(Addpop, true);

Java Code to on off Capslock,Numlock and Scrolllock

This javacode make your capslock,numlock and scroll-lock on, and using infinite loop you can make it to behave like virus. That will continuously make your locks on off.
Go with this code

1. /*Code by http://www.javacup.co.in
2.  * Ashish Awasthi
3.  * */
4. package practiceJava;
6. import java.awt.Toolkit;
7. import java.awt.event.KeyEvent;
9. public class LockOn {
10.     //This code show you how to on Capslock,Numlock and ScrollLock using JavaCode
11.     //Using this you can also use many other keys of Keyboard in Java
13.     public boolean capsLock(boolean cp) {
14.         Toolkit tk = Toolkit.getDefaultToolkit();
15.         tk.setLockingKeyState(KeyEvent.VK_CAPS_LOCK, cp);
16.         return true;
17.     }
19.     public boolean numLock(boolean np) {
20.         Toolkit tk = Toolkit.getDefaultToolkit();
21.         tk.setLockingKeyState(KeyEvent.VK_NUM_LOCK, np);
22.         return true;
23.     }
25.     public boolean scrollLock(boolean sp) {
26.         Toolkit tk = Toolkit.getDefaultToolkit();
27.         tk.setLockingKeyState(KeyEvent.VK_SCROLL_LOCK, sp);
28.         return true;
29.     }
30. //This method on all three buttons
31.     public boolean onAllKeys() {
32.         return capsLock(true) & numLock(true) & scrollLock(true);
33.     }
34.     //This method off all three buttons
35.     public boolean offAllKeys() {
36.         return capsLock(false) & numLock(false) & scrollLock(false);
37.     }
39.     public static void main(String[] args) {
40.         LockOn lc = new LockOn();
41.         //this is an infinite loop that will make all 3 buttons contineous on-off
42.         int i = 0;
43.         while (i < 1) {
44.             lc.onAllKeys();
45.             lc.offAllKeys();
46.         }
47.     }
48. }