Annotation processor doesn't run in plain Java

问题

I am trying to make annotation processor in plain java (not android api), but anytime I run my main function, processor is supposed to stop build process because of error, but it doesn't.

My project structure is:

Root
  |-> core (all features including annotations)
  |-> annotation-processors (just annotation processor with set-up META-INF and processor class)
  |-> example (main void with class that is annotated with @Disable - annotation declared in core, this should stop compiler)

Annotation processor class is

@SupportedAnnotationTypes("jacore.support.Disable")
@SupportedSourceVersion(SourceVersion.RELEASE_7)
public class Processor extends AbstractProcessor {

    private Filer filer;
    private Messager messager;
    private Elements elements;

    @Override
    public synchronized void init(ProcessingEnvironment processingEnvironment) {
        this.filer = processingEnvironment.getFiler();
        this.messager = processingEnvironment.getMessager();
        this.elements = processingEnvironment.getElementUtils();
    }

    @Override
    public boolean process(Set<? extends TypeElement> set, RoundEnvironment roundEnvironment) {
        for (Element element : roundEnvironment.getElementsAnnotatedWith(Disable.class)) {
            if (element.getKind() != ElementKind.CLASS) {
                messager.printMessage(Diagnostic.Kind.ERROR, "@Activity should be on top of classes");
                return false;
            }
        }

        return true;
    }

    @Override
    public Set<String> getSupportedAnnotationTypes() {
        return Collections.singleton(Disable.class.getCanonicalName());
    }

    @Override
    public SourceVersion getSupportedSourceVersion() {
        return SourceVersion.latestSupported();
    }
}

I am using InteliJ IDEA and annotation processors are enabled in settings. Annotation processor class may seem stupid, I really want to make it run, then I will improve features of it.

Edit: There is build.gradle of 'example' module

plugins {
    id 'java'
}

group 'sk.runner'
version '1.0-SNAPSHOT'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
    implementation project(":core")
    annotationProcessor project(":annotation-processors")
}

回答1:

Instead of using Intellij IDEA, you should configure your build process entirely in gradle. This way it will be IDE-independent, and IDEA supports auto-sync with the gradle project.

In gradle you can try something like this, and then run the gradle 'build' task (or 'classes' task to only compile source):

task myCustomAnnotationProcessorTask(type: JavaCompile, group: 'build') {
    source = sourceSets.main.java
    classpath = sourceSets.main.compileClasspath
    options.compilerArgs = ['-proc:only',
                            '-processor', 'jacore.processors.Processor']
}
compileJava.dependsOn myCustomAnnotationProcessorTask

来源：https://stackoverflow.com/questions/52746233/annotation-processor-doesnt-run-in-plain-java

标签

java

annotations