Annotation processors: Where is StandardLocation.CLASS_OUTPUT

[Marco Ladermann]

Hi all!

I'm trying to create a Griffon Application with ceylon. It was quite demanding for me to get that up and compiling, 'cause Griffon uses Guice and several other libraries for injection and aop.

In the moment I'm stuck with a griffon annotation processor, that looks for "artifacts", that are annotated as models, view and controllers. The processor generates files under META-INF/griffon containing the class names of the files, so that the griffon runtime can create models and views and inject them into the MVC objects.

Running the processor (.ceylon/config: apt=org.codehaus.griffon:griffon-core-compile/2.9.1) yields:

com.redhat.ceylon.compiler.SystemErrorException: com.redhat.ceylon.langtools.tools.javac.processing.AnnotationProcessingError: java.lang.NullPointerException
       at com.redhat.ceylon.compiler.CeylonCompileTool.handleExitCode(CeylonCompileTool.java:917)
       at com.redhat.ceylon.compiler.CeylonCompileTool.run(CeylonCompileTool.java:901)
       at com.redhat.ceylon.common.tools.CeylonTool.run(CeylonTool.java:547)
       at com.redhat.ceylon.common.tools.CeylonTool.execute(CeylonTool.java:423)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:498)
       at com.redhat.ceylon.launcher.Launcher.runInJava7Checked(Launcher.java:108)
       at com.redhat.ceylon.launcher.Launcher.run(Launcher.java:38)
       at com.redhat.ceylon.launcher.Launcher.run(Launcher.java:31)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:498)
       at com.redhat.ceylon.launcher.Bootstrap.runVersion(Bootstrap.java:162)
       at com.redhat.ceylon.launcher.Bootstrap.runInternal(Bootstrap.java:117)
       at com.redhat.ceylon.launcher.Bootstrap.run(Bootstrap.java:93)
       at com.redhat.ceylon.launcher.Bootstrap.main(Bootstrap.java:85)
Caused by: com.redhat.ceylon.langtools.tools.javac.processing.AnnotationProcessingError: java.lang.NullPointerException
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:834)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacProcessingEnvironment.access$200(JavacProcessingEnvironment.java:95)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacProcessingEnvironment$DiscoveredProcessors$ProcessorStateIterator.runContributingProcs(JavacProcessingEnvironment.java:646)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1064)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1231)
       at com.redhat.ceylon.langtools.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1173)
       at com.redhat.ceylon.langtools.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:857)
       at com.redhat.ceylon.compiler.java.tools.LanguageCompiler.compile(LanguageCompiler.java:272)
       at com.redhat.ceylon.compiler.java.launcher.Main.compile(Main.java:659)
       at com.redhat.ceylon.compiler.java.launcher.Main.compile(Main.java:565)
       at com.redhat.ceylon.compiler.java.launcher.Main.compile(Main.java:557)
       at com.redhat.ceylon.compiler.java.launcher.Main.compile(Main.java:546)
       at com.redhat.ceylon.compiler.CeylonCompileTool.run(CeylonCompileTool.java:900)
       ... 17 more
Caused by: java.lang.NullPointerException
       at java.io.Writer.<init>(Writer.java:88)
       at java.io.FilterWriter.<init>(FilterWriter.java:55)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacFiler$FilerWriter.<init>(JavacFiler.java:291)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacFiler$FilerOutputFileObject.openWriter(JavacFiler.java:141)
       at com.redhat.ceylon.langtools.tools.javac.processing.wrappers.FileObjectFacade.openWriter(FileObjectFacade.java:57)
       at org.kordamp.jipsy.processor.AbstractResourcePersistence.createWriter(AbstractResourcePersistence.java:91)
       at org.kordamp.jipsy.processor.AbstractPersistence.write(AbstractPersistence.java:55)
       at org.codehaus.griffon.compile.core.processor.artifact.ArtifactProviderProcessor.writeData(ArtifactProviderProcessor.java:103)
       at org.kordamp.jipsy.processor.AbstractSpiProcessor.process(AbstractSpiProcessor.java:72)
       at com.redhat.ceylon.langtools.tools.javac.processing.wrappers.ProcessorWrapper.process(ProcessorWrapper.java:66)
       at com.redhat.ceylon.langtools.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:822)
       ... 29 more

It seems that a call to the filers createResource is the root of the problem

fo = filer.createResource(StandardLocation.CLASS_OUTPUT,"", "Test.properties");

BTW: Creating the files by hand and putting them under "<module>/ROOT/META-INF/griffon/..." works.

Best regards,

Marco

[Stephane Epardaud]

Hi,

I'd have to test this to figure out what best to do. Can you report an issue with some test code I can run on https://github.com/ceylon/ceylon/issues ?

Thanks.

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Stéphane Épardaud

[Marco Ladermann]

Hi Stéphane.

Of course. I will do so tomorrow.

Marco.

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Stéphane Épardaud

[Marco Ladermann]

Here is the issue: Annotation processor throws NullPointer

Thanks!