Mapped attribute and regex not returning expected result

[Cantor, Scott]

> Using https://regex101.com/ the above expression returns Group 1 as '1234'
> and Group 2 as 'A'

Notwithstanding that only actual Java code/testing matters, I believe the issue is that the code only performs replacement if the expression as a whole matches the input, and according to the Java test sites of that nature, the actual match result is false.

e.g. http://www.regexplanet.com/advanced/java/index.html

-- Scott