NPE during compilation in Android Studio

[AlexKorovyansky]

I'm trying to use Immutables for Android Project. But it crashes with NPE during compilation. Steps to reproduce:

1) Create new Android Project in Android Studio 0.8.8 (with default parameters)

2) Add to build.gradle

android {
..
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_6
        targetCompatibility JavaVersion.VERSION_1_6
    }
}

dependencies {
    ...
    compile 'org.immutables:annotation:0.16'
    provided 'org.immutables:generate-tool:0.16'
}

3) Add dummy data class:

@GenerateImmutable
public abstract class Data {
    public abstract int number();
}

4) Click Run

Expected Behaviour: Successful compilation
Actual Result: NullPointerException during compilation:

22:38:51.122 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: java.lang.NullPointerException
22:38:51.122 [ERROR] [org.gradle.BuildExceptionReporter]    at org.immutables.generate.internal.processing.Processor.inspectGenerateType(Processor.java:99)
22:38:51.122 [ERROR] [org.gradle.BuildExceptionReporter]    at org.immutables.generate.internal.processing.Processor.processAnnotations(Processor.java:82)
22:38:51.122 [ERROR] [org.gradle.BuildExceptionReporter]    at org.immutables.generate.internal.processing.Processor.process(Processor.java:70)
22:38:51.123 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:793)
22:38:51.123 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:722)
22:38:51.123 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1700(JavacProcessingEnvironment.java:97)
22:38:51.124 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1029)
22:38:51.124 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1163)
22:38:51.124 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1108)
22:38:51.124 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:824)
22:38:51.125 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.main.Main.compile(Main.java:439)
22:38:51.125 [ERROR] [org.gradle.BuildExceptionReporter]    ... 68 more

Environment: Android Studio 0.8.8, OS X 10.9.4, Java 7 (1.7.0_60)

Do you support Android? Any ideas how to fix this error?

[elucash]

Hi, never tried with Android, sorry. But I expect it should work.
I will check this and try to fix, already have some ideas why this might happen.

[elucash]

Got Immutables to work on Android Studio v0.8.6. I was unable to reproduce the exact same exception, but a lot of similar problems were encountered and fixed.

• Use newly released version of Immutables 0.18 or higher
  • Fixes were made to generate classes in default package etc
• Change to JavaVersion.VERSION_1_7. Currently Immutables processor require java 7
• Add artifact for annotations that are missing in Android SDK
  • compile 'javax.annotation:jsr250-api:1.0'
• Generated classes should be added to source folders. Here I might consult projects that may have solved how to do this:
  • see Android Annotations
  • see Auto Value/Parcel for android frankiesardo/auto-parcel
    • classpath 'com.neenbedankt.gradle.plugins:android-apt:+'
    • apply 'android-apt'

It is difficult to make general statement about Android/studio support, but I was able to see the successful compilation of generated classes in Android studio. I hope this helps if you try it!

P.S. If you looking for something like @ExcludeAnnotation, Immutables has @GenerateAuxiliary

[elucash]

Compiles successfully on Android Studio v0.8.6, verified with version 1.0.1
Checklist

• JavaVersion.VERSION_1_7
• apply plugin 'android-apt'
• compile 'javax.annotation:jsr250-api:1.0'