FixmeProcessor.java

package com.gofore.fixme.processor;

import com.gofore.fixme.annotation.Fixme;

import javax.annotation.processing.*;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;
import java.util.Set;

@SupportedSourceVersion(SourceVersion.RELEASE_8)
@SupportedAnnotationTypes("com.gofore.fixme.annotation.Fixme")
public class FixmeProcessor extends AbstractProcessor {

    private ProcessingEnvironment env;

    @Override
    public synchronized void init(ProcessingEnvironment env) {
        this.env = env;
    }

    @Override
    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        if (!roundEnv.processingOver()) {
            annotations.forEach(annotation -> {
                roundEnv.getElementsAnnotatedWith(annotation).forEach(element -> env.getMessager().printMessage(
                    Diagnostic.Kind.WARNING,
                    String.format("@%s: %s", annotation.getSimpleName(), getSummary(element)),
                    element));
            });
        }
        return true;
    }

    private String getSummary(Element element) {
        return element.getAnnotation(Fixme.class).summary();
    }

}