replaceNull
Description: The replaceNull
function returns the argument if the Subject is null. Otherwise, returns the Subject.
Subject Type: Any
Arguments:
Replacement : The value to return if the Subject is null.
Return Type: Type of Subject if Subject is not null; else, type of Argument
Examples: If the attribute "filename" has the
value "a brand new filename.txt" and the attribute "hello" does not
exist, then the Expression ${filename:replaceNull('abc')}
will
return "a brand new filename.txt", while
${hello:replaceNull('abc')}
will return
"abc".