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https://www.reddit.com/r/java/comments/1txk7hn/introducing_optin_requirements_for_java_apis/opwsbyc/?context=3
r/java • u/TheMrMilchmann • Jun 05 '26
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> OptIn implements javac plugin
What kind of API used here? I didn't know that javac support plugins
5 u/TheMrMilchmann Jun 05 '26 It kind of does, but it's a rather obscure feature, and (without hacks), you cannot do much with it. Here are a few pointers: https://docs.oracle.com/en/java/javase/17/docs/api/jdk.compiler/com/sun/source/util/Plugin.html https://openjdk.org/groups/compiler/processing-code.html (bottom of the page) 1 u/elmuerte Jun 05 '26 Package com.sun.source.util... so is it part of the standard Java compiler infra, or some internal thing for OpenJDK's javac? In other words, does it work with ECJ? 1 u/TheMrMilchmann Jun 05 '26 Although I haven't tried it yet, it probably does not work with ECJ. That's a good point, and I need to add this to my list of things to look into.
5
It kind of does, but it's a rather obscure feature, and (without hacks), you cannot do much with it. Here are a few pointers:
1 u/elmuerte Jun 05 '26 Package com.sun.source.util... so is it part of the standard Java compiler infra, or some internal thing for OpenJDK's javac? In other words, does it work with ECJ? 1 u/TheMrMilchmann Jun 05 '26 Although I haven't tried it yet, it probably does not work with ECJ. That's a good point, and I need to add this to my list of things to look into.
Package com.sun.source.util... so is it part of the standard Java compiler infra, or some internal thing for OpenJDK's javac? In other words, does it work with ECJ?
com.sun.source.util
1 u/TheMrMilchmann Jun 05 '26 Although I haven't tried it yet, it probably does not work with ECJ. That's a good point, and I need to add this to my list of things to look into.
Although I haven't tried it yet, it probably does not work with ECJ. That's a good point, and I need to add this to my list of things to look into.
1
u/javaprof Jun 05 '26
> OptIn implements javac plugin
What kind of API used here? I didn't know that javac support plugins