@Log annotation to initialize Logger field

[John Kozlov]

I would like to create @Log annotation to generate initializers for Logger fields:

import java.util.logging.Logger

class LoggerExample {

@Log Logger log

}

This is supposed to be translated to:

public class LoggerExample {

  @Log

  private final static Logger log = java.util.logging.Logger.getLogger("log.LoggerExample");

}

I defined the following processor:

@Target(ElementType::FIELD)

@Active(typeof(LogProcessor))

annotation Log {

}

class LogProcessor extends AbstractFieldProcessor {

override doTransform(MutableFieldDeclaration field, extension TransformationContext context) {

field.initializer = [ '''java.util.logging.Logger.getLogger("«field.declaringType.qualifiedName»")''' ]

field.final = true

field.static = true

}

}

However the compiler reports an error for LoggerExample : "The blank final field log may not have been initialized"

What should I do to make my processor work?

Thanks in advance!

[Sven Efftinge]

Hi John,

the analyzation of proper initialization currently doesn't work nicely with active annotations.

A workaround would be to make the @Log annotations a class level annotation, which syhthetically creates the Log field.

With that you have even less to write :-)

This bug is related : Bug 404167

Sven

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[John Kozlov]

Thanks! I have already came to the same idea :)

понедельник, 10 июня 2013 г., 19:55:37 UTC+7 пользователь Sven Efftinge написал:

[Zsombor]

Yes, and it's a working idea, as I've already implemented this annotation:
 https://github.com/gzsombor/logging-annotation

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