* annotation processors don't break the incremental processing contract.
 */
public class IncrementalFiler implements Filer {
    private final Filer delegate;
    private final IncrementalProcessingStrategy strategy;

    IncrementalFiler(Filer delegate, IncrementalProcessingStrategy strategy) {
        this.delegate = delegate;
        if (strategy == null) {

    }

    @Override
    public void init(ProcessingEnvironment processingEnv) {
        IncrementalFiler incrementalFiler = new IncrementalFiler(processingEnv.getFiler(), strategy);
        IncrementalProcessingEnvironment incrementalEnvironment = new IncrementalProcessingEnvironment(processingEnv, incrementalFiler);
        super.init(incrementalEnvironment);
        strategy.updateFromOptions(getSupportedOptions());
    }

    }

    @Override
    public final void init(ProcessingEnvironment processingEnv) {
        IncrementalFiler incrementalFiler = new IncrementalFiler(processingEnv.getFiler(), strategy);
        IncrementalProcessingEnvironment incrementalProcessingEnvironment = new IncrementalProcessingEnvironment(processingEnv, incrementalFiler);
        super.init(incrementalProcessingEnvironment);
    }

    @Override

    }

    @Override
    public final void init(ProcessingEnvironment processingEnv) {
        IncrementalFiler incrementalFiler = new IncrementalFiler(processingEnv.getFiler(), strategy);
        IncrementalProcessingEnvironment incrementalProcessingEnvironment = new IncrementalProcessingEnvironment(processingEnv, incrementalFiler);
        super.init(incrementalProcessingEnvironment);
    }

    @Override

 * their behavior.
 */
class IncrementalProcessingEnvironment implements ProcessingEnvironment {
    private final ProcessingEnvironment delegate;
    private final IncrementalFiler filer;

    IncrementalProcessingEnvironment(ProcessingEnvironment delegate, IncrementalFiler filer) {
        this.delegate = delegate;
        this.filer = filer;
    }

    @Override
    public Map<String, String> getOptions() {

abstract class IncrementalFilerTest extends Specification {
    Filer delegate = Stub(Filer)
    AnnotationProcessingResult result = new AnnotationProcessingResult()
    Filer filer

    def setup() {
        filer = new IncrementalFiler(delegate, getStrategy(new AnnotationProcessorResult(result, "TestProcessor")))
    }

    abstract IncrementalProcessingStrategy getStrategy(AnnotationProcessorResult result)

    PackageElement pkg(String packageName) {

Class <org.gradle.api.internal.tasks.compile.processing.IncrementalFiler> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (IncrementalFiler.java:0)