Question

I have an APT processor that display warnings on some conditions.
My project is using a maven1 build calling ant:apt

How to make maven fails when warning conditions are met ? (the processor can be modified)

Thanks.

Answer 1

The annotation processor needs to create a message of Kind ERROR. This results in a Compilation Failure, which in turn will abort the ant build (unless the failonerror parameter of the ant javac task is set to false). (And this in turn should fail the maven task)

processingEnvironment
    .getMessager()
    .printMessage(Kind.ERROR, "your error message here");

(Acquire the ProcessingEnvironment through the processor’s init method)

Reference:

• ProcessingEnvironment.getMessager()
• Messager.printMessage(Kind, CharSequence)
• Diagnostic.Kind.ERROR