package com.test.jsf.validator;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.FacesValidator;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

@FacesValidator(value="com.test.jsf.EmailValidator")
public class EmailValidator implements Validator
{

    private static final String emailRegexPattern = "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,4}$";
    
    @Override
    public void validate(FacesContext arg0, UIComponent arg1, Object arg2)
            throws ValidatorException
    {
        String rawEmail = (String)arg2;
        Pattern p = Pattern.compile(emailRegexPattern, Pattern.CASE_INSENSITIVE);
        Matcher m = p.matcher(rawEmail);
        boolean validEmail = m.matches();
      
        if (!validEmail)
        {
            FacesMessage msg = new FacesMessage("Invalid Email Address");
            throw new ValidatorException(msg);
        }
    }
    
}