[jira] [Created] (NIFI-6502) add padLeft() and padRight() functions to RecordPath

["Alessandro D'Armiento (JIRA)" <ji...@apache.org>]

Alessandro D'Armiento created NIFI-6502:
-------------------------------------------

             Summary: add padLeft() and padRight() functions to RecordPath 
                 Key: NIFI-6502
                 URL: https://issues.apache.org/jira/browse/NIFI-6502
             Project: Apache NiFi
          Issue Type: New Feature
          Components: Core Framework
    Affects Versions: 1.9.2
            Reporter: Alessandro D'Armiento


h2. Current Situation

- [Record path functions|https://nifi.apache.org/docs/nifi-docs/html/record-path-guide.html#functions] don't provide anything to perform string padding

h1. Improvement Proposal
- Support two new recordPath functions
-- padLeft:
--- padLeft(string field, int desiredLength) will prepend a default character to the input string until it reaches the length desiredLength
--- padLeft(String field, int desiredLength, char c) will prepend the c characters to the input string until it reaches the length n
-- padRight:
--- padRight(string field, int desiredLength) will append a default character to the input string until it reaches the length desiredLength
--- padRight(String field, int desiredLength, char c) will append the c characters to the input string until it reaches the length n
-- Default character should be a renderable character such as underscore
-- If the input string is already longer than the padding length, no operation should be performed 

h3. Examples

----
{
  "name" : "john smith"
}
----

`padLeft(/name, 15, '@')` | @@@@@john smith
`padLeft(/name, 15)` | _____john smith
`padRight(/name, 15, '@')` | john smith@@@@@
`padRight(/name, 15)` | john smith_____



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