Java 25: Compact source files

[Laurens-W]

What's changed?

Allow parser to parse compact source files

What's your motivation?

Java 25 coming out next week

Any additional context

https://openjdk.org/jeps/512

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

Had a brief look at Kotlin (perhaps you did as well); for context there we seem to use an OmitBraces marker:

rewrite/rewrite-kotlin/src/main/java/org/openrewrite/kotlin/internal/KotlinPrinter.java

Lines 602 to 605 in a76af30

	boolean omitBraces = block.getMarkers().findFirst(OmitBraces.class).isPresent();
	if (!omitBraces) {
	p.append("{");
	}

I wonder if it makes sense to copy that marker here and deprecate the old one, as opposed to using CompactSourceFile in both printing the compilation unit as well as printing the class declaration.

[Laurens-W]

I think that makes a whole lot of sense, in retrospect I knew this existed but hadn't considered using this concept separately from the CompactSourceFile marker. I applied this to the PR instead of overloading the visitBlock in the Java printer!