RE: Struts check box validation question

Tue, 10 Feb 2004 13:29:20 -0800

Here's code I got from Kris Schneider. It validates that at least one of the check boxes was checked, but you should be able to change it fairly easily to do whatever you want. If you're wondering how this code fits in, check out:
http://jakarta.apache.org/struts/userGuide/dev_validator.html
and look at validateTwoFields to see how to setup of custom validate methods.

public static boolean validateRequiredArray(Object bean,
ValidatorAction va,
Field field,
ActionErrors errors,
HttpServletRequest request) {
boolean isValid = false;

LOG.debug("bean: " + bean);

Object[] array = null;
if (isArray(bean)) {
array = (Object[])bean;
} else {
Object fieldProperty = null;
try {
fieldProperty = PropertyUtils.getProperty(bean, field.getProperty());
} catch (Exception exc) {
// TODO: throw runtime exception?
LOG.error(exc.getMessage(), exc);
}
LOG.debug("fieldProperty: " + fieldProperty);
if (isArray(fieldProperty)) {
array = (Object[])fieldProperty;
}
}

       if (array != null) {
           for (int i = 0, n = array.length; i < n; i++) {
               Object obj = array[i];
               LOG.debug("array[" + i + "]: '" + obj + "'");
               String value = ((obj == null) ? null : obj.toString());
               if (!GenericValidator.isBlankOrNull(value)) {
                   isValid = true;
                   break;
               }
           }
       }

if (!isValid) {
errors.add(field.getKey(), Resources.getActionError(request, va, field));
}

LOG.debug("isValid: " + isValid);

       return isValid;
   }

   public static boolean isArray(Object obj) {
       return ((obj == null) || obj.getClass().isArray());
   }
}

-Ben

From: "Samyukta Akunuru" <[EMAIL PROTECTED]>
Reply-To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Subject: Struts check box validation question
Date: Tue, 10 Feb 2004 12:57:23 -0600

Had a quick question on power of struts form validation.Sample code to validate checkboxes checked on the jsp, which will be sent as an array to the Struts Action Form. Tips appreciate.Thanks in advance!

Best Regards,
Samy



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