validation of arrays using validator.xml

[Deepak vellore]

hi, i want to validate form properties which are of type arrays , how can i validate the same.

[Ud Naik]

Dont know if this fits your requirement, but it's worth a try

1) Write a class that does the validation for you:

package package.blahblah;
 
import necessary stuff;
 
public class [B]ArrayFieldsValidator[/B] 
{

public static boolean [B]validateArrayFields[/B](Object bean, ValidatorAction va, Field field, ActionMessages errors, Validator validator,HttpServletRequest request) 
{
           String[] firstValue = ValidatorUtils.getValueAsString(bean, field.getProperty());
   String[] secondValue = ValidatorUtils.getValueAsString(bean, field.getVarValue("[B]compareWith[/B]"));;
 
           /* Do the restof the validation here
           */
        }
    

2) Add a new validator to validation-rules.xml with the above class as the validator

  
 
<validator name="[B]arrayFieldsValidate[/B]"
            classname="package.blahblah.[B]ArrayFieldsValidator[/B]"
               method="[B]validateArrayFields[/B]"
         methodParams="java.lang.Object,
                       org.apache.commons.validator.ValidatorAction,
                       org.apache.commons.validator.Field,
                       org.apache.struts.action.ActionMessages,
                       org.apache.commons.validator.Validator,
                       javax.servlet.http.HttpServletRequest"
              depends=""
                  msg="[B]errors.arrayFieldsNotMatch[/B]"/>
 

3) Use this validator in validation.xml

 
 
<form name="myArrayForm">
            <field
                property="arrayField"
                depends="required,[B]arrayFieldsValidate[/B]">
                    <arg0 key="yourChoice"/>
                    <arg1 key="oneMoreChoice"/>
                    <var>
                    <var-name>[B]compareWith[/B]</var-name>
                    <var-value>anotherArrayField</var-value>
                    </var>
              </field>

Hope this has been clear. Good luck.