[jira] [Reopened] (NIFI-7055) createListValidator returns valid for empty list with "," input

["Matt Burgess (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matt Burgess reopened NIFI-7055:
--------------------------------

Reopening due to issue in PutCassandraRecord unit test. Instead of testing the PCR code finds the error, the processor will be invalid, so we can remove that test

> createListValidator returns valid for empty list with "," input
> ---------------------------------------------------------------
>
>                 Key: NIFI-7055
>                 URL: https://issues.apache.org/jira/browse/NIFI-7055
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Otto Fowler
>            Assignee: Otto Fowler
>            Priority: Major
>             Fix For: 1.12.0
>
>          Time Spent: 2h 40m
>  Remaining Estimate: 0h
>
> from Slack:
> <wo...@tesorion.nl>
> "I'm looking at the createListValidator, and to my surprise passing in a list of (essentially) two empty elements "," validates, while a totally empty string "" does not. Apparently due to some underlying behavior of String.split."
> The string "," does return a String[0] from split. This should fail validation as if here were no elements as null, "", " " do possibly.  
> But that kind of goes against or doesn't consider the ignore empty entries.  
> I think the difference is whether or not you consider "," to be a list of two empty elements or an empty list.
> The current implementation with String.spilt() will produce an empty list.  Is that correct?



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