DO NOT REPLY [Bug 34454] New: - [contribution] Consecutive Date Validator

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http://issues.apache.org/bugzilla/show_bug.cgi?id=34454

           Summary: [contribution] Consecutive Date Validator
           Product: Struts
           Version: 1.2.4
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Validator Framework
        AssignedTo: dev@struts.apache.org
        ReportedBy: kcbaltz@yahoo.com


[I sent this originally to struts-user and James Mitchell suggested I put it in
as an enhancement so it wouldn't be lost]

I had the need today to validate that two dates (start and end) are in the
proper relation.  Searching the oracle at Google, I was unable to find any
solution other than people looking for the same thing and being directed to
write their own.  So I wrote one today and figured I'd contribute it back so
that others can find it and I can also get a little extra scrutiny.

This was written for Struts 1.2.4

K.C. Baltz

================== snippet from validator-rules.xml ================
   <validator name="consecutiveDates"
       classname="com.mycompany.web.util.ValidationUtil"
       method="validateConsecutiveDates"
       methodParams="java.lang.Object,
                     org.apache.commons.validator.ValidatorAction,
                     org.apache.commons.validator.Field,
                     org.apache.struts.action.ActionMessages,
                     javax.servlet.http.HttpServletRequest"
       depends=""
       msg="errors.consecutiveDates">
   </validator>

=================== Example entry in validation.xml ================
       <form name="manageResourcesForm">
          <!-- validate that this both a valid date and that it precedes the end
date -->
           <field property="startDate" depends="date,consecutiveDates">
               <msg name="consecutiveDates" key="errors.consecutiveDates" />

               <arg0 key="admin.editNotice.prompt.startDate" />
               <arg1 key="admin.editNotice.prompt.endDate" />
               <var>
                   <var-name>secondProperty</var-name>
                   <var-value>endDate</var-value>
               </var>
           </field>

            <!-- need to validate that this is a date -->
           <field property="endDate" depends="date">
               <arg0 key="admin.editNotice.prompt.endDate" />
           </field>
       </form>

=============== snippet from ValidationUtil.java ================
   public static boolean validateConsecutiveDates(Object bean, ValidatorAction
va, Field field,
           final ActionMessages errors, HttpServletRequest request)
   {
       boolean passedValidation = true;
       String startDateString = ValidatorUtils.getValueAsString(bean,
field.getProperty());
       String sProperty2 = field.getVarValue("secondProperty");
       String endDateString = ValidatorUtils.getValueAsString(bean, sProperty2);

       if(!GenericValidator.isBlankOrNull(startDateString) &&
!GenericValidator.isBlankOrNull(endDateString))
       {
           try
           {
               Locale locale = RequestUtils.getUserLocale(request, null);
                             DateFormat formatter =
DateFormat.getDateInstance(DateFormat.SHORT, locale);

               Date startDate = null;
               Date endDate = null;
               try
               {
                   startDate = formatter.parse(startDateString);
               }
               catch (ParseException e)
               {
                   errors.add(field.getArg(0).getKey(), new
ActionMessage("errors.date", startDateString));
                   passedValidation = false;
               }
               try
               {
                   endDate = formatter.parse(endDateString);
               }
               catch (ParseException e)
               {
                   errors.add(field.getArg(1).getKey(), new
ActionMessage("errors.date", endDateString));
                   passedValidation = false;
               }

               if( startDate != null && endDate != null &&
startDate.after(endDate) )
               {
                   errors.add(ActionMessages.GLOBAL_MESSAGE,
Resources.getActionMessage(request, va, field));
                   passedValidation = false;
               }

               return passedValidation;
           }
           catch(Exception e)
           {
               log.error("Exception caught trying to perform
validateConsecutiveDates", e);
               errors.add(field.getKey(), Resources.getActionMessage(request,
va, field));

               return false;
           }
       }

       return true;
   }
=====================================

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