Justin Rittenhouse created NIFI-5528:
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Summary: a literal() expression parses null values as the word
"null"
Key: NIFI-5528
URL: https://issues.apache.org/jira/browse/NIFI-5528
Project: Apache NiFi
Issue Type: Bug
Reporter: Justin Rittenhouse
Example:
I have the ReplaceText processor set up with a regular expression using capture
groups. I am referring to the value of an attribute via the capture groups:
literal(${${'$2'}}):isEmpty()
if the attribute referred to by the $2 capture group reference is either empty
or doesn't exist, literal will return "null". The above code will permanently
return false because of this.
literal(${${'$2'}}):equals("null")
This works as a workaround.
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