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From "Andy LoPresto (Jira)" <j...@apache.org>
Subject [jira] [Created] (NIFI-6782) Create EL function for repeating a string
Date Wed, 16 Oct 2019 20:38:00 GMT
Andy LoPresto created NIFI-6782:
-----------------------------------

             Summary: Create EL function for repeating a string
                 Key: NIFI-6782
                 URL: https://issues.apache.org/jira/browse/NIFI-6782
             Project: Apache NiFi
          Issue Type: New Feature
          Components: Extensions
    Affects Versions: 1.9.2
            Reporter: Andy LoPresto
            Assignee: Matt Burgess


As per a discussion with [~mattyb149], an Expression Language function which allowed for a
number of repetitions of a string would be useful for generating arbitrary random text in
a {{GenerateFlowFile}} processor. The usage would be:

{code}
${"some string here":repeat(4)} # repeats the literal string 4 times
${literal("this_is_also_an_attribute_name"):repeat(3)} # repeats the literal string 3 times
${my_string_attr:repeat(5)} # repeats the value in the attribute 5 times
${"explicit string":repeat(random():mod(10):plus(1))} # repeats the string between 1 and 10
times
{code}

If it's easy to implement, I think a multiple parameter option would also be convenient, but
it is not a requirement: 

{code}
${"explicit string":repeat(random():mod(10):plus(1))} # repeats the string between 1 and 10
times
${"explicit string":repeat(1, 10)} # identical behavior to above
{code}



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