maxselected, for those interested

[Dan Allen <da...@mojavelinux.com>]

Here is the necessary code to get maxselected working for the
select-multiple element when validating.  These means you can only
select x number of options from a multiple select.  This can be
extended for other elements, but I have not gotten to that yet.

<validator
    name="maxselected"
    classname="net.creativerge.struts.validator.FieldChecks"
    method="validateMaxSelected"
    methodParams="java.lang.Object,
        org.apache.commons.validator.ValidatorAction,
        org.apache.commons.validator.Field,
        org.apache.struts.action.ActionErrors,
        javax.servlet.http.HttpServletRequest"
    msg="errors.maxselected">
    <javascript><![CDATA[
        function validateMaxSelected(form) {
            var bValid = true;
            var focusField = null;
            var i = 0;
            var fields = new Array();
            oMaxSelected = new maxselected();
            for (x in oMaxSelected) {
                if (form[oMaxSelected[x][0]].type == 'select-multiple') {
                    var iMax = parseInt(oMaxSelected[x][2]("maxselected"));
                    var numSelected = 0;
                    for (var j = 0; j < form[oMaxSelected[x][0]].options.length; j++)
                    {
                        if (form[oMaxSelected[x][0]].options[j].selected)
                        {
                            numSelected++;
                            if (numSelected > iMax)
                            {
                                if (i == 0) {
                                    focusField = form[oMaxSelected[x][0]];
                                }
                                fields[i++] = oMaxSelected[x][1];
                                bValid = false;
                                break;
                            }
                        }
                    }
                }
            }
            if (fields.length > 0) {
               focusField.focus();
               alert(fields.join('\n'));
            }
            return bValid;
        }]]>
    </javascript>
</validator>

public static boolean validateMaxSelected(
	Object bean,
	ValidatorAction va,
	Field field,
	ActionErrors errors,
	HttpServletRequest request)
{
	try
	{
		String value[] = BeanUtils.getArrayProperty(bean, field.getProperty());
		int max = Integer.parseInt(field.getVarValue("maxselected"));

		if (value != null && value.length > max)
		{
			errors.add(field.getKey(), Resources.getActionError(request, va, field));
			return false;
		}
	}
	catch (Exception e)
	{
		errors.add(field.getKey(), Resources.getActionError(request, va, field));
        return false;
	}
	
	return true;
}

Hope you find it useful.

Dan

-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
Daniel Allen, <da...@mojavelinux.com>
http://www.mojavelinux.com/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
'One Microsoft Way' is more than just an address.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

---------------------------------------------------------------------
To unsubscribe, e-mail: struts-user-unsubscribe@jakarta.apache.org
For additional commands, e-mail: struts-user-help@jakarta.apache.org