package yarfraw.utils;

 import java.net.URI;

 import java.net.URISyntaxException;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 import org.apache.commons.lang.ArrayUtils;

 import yarfraw.core.datamodel.ValidationException;

 public class ValidationUtils{

   private ValidationUtils(){}

   private static final Pattern EMAIL = Pattern.compile(

           "^[_A-Za-z0-9-]+(\\.[_A-Za-z0-9-]+)*@[A-Za-z0-9-]+(\\.[A-Za-z0-9-]+)*$",

           Pattern.CASE_INSENSITIVE);

   public static void validateNotNull(String message, Object... o) throws ValidationException{

     if(!ArrayUtils.isEmpty(o)){

       for(Object oo : o){

         if(oo== null){

           throw new ValidationException(message);

         }

       }

     }

   }

   public static void validateUri(String message, String... uri) throws ValidationException{

     if(!ArrayUtils.isEmpty(uri)){

       for(String s : uri){

         if(s != null){

           try {

             @SuppressWarnings("unused")

             URI u  = new URI(s);

           } catch (URISyntaxException e) {

             throw new ValidationException(message, e);

           }

         }

       }

     }

   }

   /**

    * Validation methods for emails.

    * 

    * @param message - A custom message for the ValidationException

    * @param emails 

    * @throws ValidationException - if any of the input emails are not valid.

    */

   public static void validateEmails(String message, String... emails) throws ValidationException{

     if(!ArrayUtils.isEmpty(emails)){

       for(String email : emails){

         if(email != null){

           Matcher m = EMAIL.matcher(email);

           if(!m.matches()){

             throw new ValidationException(message);

           }

         }

       }

     }

   }

 }