[GROOVY-8235] JSR308 avoid compiler errors for legacy versions

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.4.12
• Assignee: Paul King
• Reporter: Paul King
• Created: 21/Jun/17 03:27
• Updated: 06/Mar/18 23:14
• Resolved: 21/Jun/17 04:42

Description

We should backport a subset of the functionality from GROOVY-8226 so that pre-JDK8 target types are honored and JDK8/9 targets are ignored rather than errors. So basically, this:

@Target([PARAMETER, TYPE_USE])
@Retention(RUNTIME)
public @interface NonNull { }

will be treated as if it was this:

@Target([PARAMETER])
@Retention(RUNTIME)
public @interface NonNull { }

Rather than complain about the unknown TYPE_USE target.