Add Elvis Operator to Simplfy Null Handling

[hantsy]

eg. if email is null, returns Not Found instead, else returns email property.

customer.email?:'Not Found'

[markt-asf]

I have an implementation of this in the current Tomcat 12 development branch. You can download SNAPSHOT build a standard distribution from:
https://repository.apache.org/content/groups/snapshots/org/apache/tomcat/tomcat/12.0.0-M1-SNAPSHOT/

Embedded and individual JARs are also available.

If you could try that and and confirm whether or not it works for you that would be great. I can then work on the changes required to the specification document and some TCK tests.

[markt-asf]

It has been over a month without feedback. The operator works as expected for me so I am going to proceed with the spec updates and TCK tests for 6.1.