MobileNumberConverter.java

import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;

public class MobileNumberConverter implements Converter
{
  public Object getAsObject(FacesContext facesContext, UIComponent uiComponent, String string) // set
  {
    if ( string == null || string.trim().equals("") )
    {
      return null;
    }
    if(string.length() != 10)
    {
      FacesMessage message = new FacesMessage("You have to enter mobile number in this format [089xxxxxxx].");
      message.setSeverity(FacesMessage.SEVERITY_ERROR);
      throw new ConverterException(message);
    }
    String number = string.substring(1, 10);
    number = "353" + number;
    return number;
  }

  public String getAsString(FacesContext facesContext, UIComponent uiComponent, Object object) // get
  {
    if ( object == null )
    {
      return "";
    }
    
    String obj = object.toString();
    String number = obj.substring(3, 12);
    number = "0" + number;
    return number;
  }
}