Improve error handling to avoid "NullPointerException" when getters/setters are forgotten.

[Queatz]

Unable to build project using realm due to an NPE during build:

23:51:03.024 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: java.lang.NullPointerException
23:51:03.025 [ERROR] [org.gradle.BuildExceptionReporter]    at com.squareup.javawriter.JavaWriter.beginMethod(JavaWriter.java:401)
23:51:03.025 [ERROR] [org.gradle.BuildExceptionReporter]    at com.squareup.javawriter.JavaWriter.beginMethod(JavaWriter.java:378)
23:51:03.026 [ERROR] [org.gradle.BuildExceptionReporter]    at io.realm.processor.RealmProxyClassGenerator.emitAccessors(RealmProxyClassGenerator.java:199)
23:51:03.026 [ERROR] [org.gradle.BuildExceptionReporter]    at io.realm.processor.RealmProxyClassGenerator.generate(RealmProxyClassGenerator.java:171)
23:51:03.026 [ERROR] [org.gradle.BuildExceptionReporter]    at io.realm.processor.RealmProcessor.process(RealmProcessor.java:239)
23:51:03.027 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:793)
23:51:03.027 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:722)
23:51:03.028 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1700(JavacProcessingEnvironment.java:97)
23:51:03.028 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1029)
23:51:03.029 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1163)
23:51:03.029 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1108)
23:51:03.030 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:824)
23:51:03.030 [ERROR] [org.gradle.BuildExceptionReporter]    at com.sun.tools.javac.main.Main.compile(Main.java:439)
23:51:03.031 [ERROR] [org.gradle.BuildExceptionReporter]    ... 73 more

[Queatz]

Turns out I had forgotten to generate getters/setters for one of the classes. Spent so much time trying to figure this one out. :/

[cmelchior]

Thank you for reporting this. We should definitely improve error reporting in cases like this.

[bensandee]

FWIW, I got the same errors if my field names didn't match the exact format. The documentation isn't all that clear, I usually prefix member fields with "m" (Android-style) and that of course fails.

[chris6647]

FYI this also occurs if one uses public static final variables which do not have a getter/setter. I was unaware that even these could not be in a RealmObject sub-class.

[jenzz]

@chris6647 Thanks for mentioning the issue wrt constants w/o getters, saved me loads of time! :)

[falkorichter]

+1 for this issue. Why is there no proper error message when the getter and setter are missing? This just cost me a couple of hours...

[cmelchior]

This has been released as part of 0.79.0

[Queatz]

Awesome!