test/langtools/tools/javac/enum/6424358/T6424358.java

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/*
 * @test
 * @bug     6424358 7025809
 * @summary Synthesized static enum method values() is final
 * @author  Peter von der Ah\u00e9
 * @library /tools/javac/lib
 * @modules java.compiler
 *          jdk.compiler
 * @build   JavacTestingAbstractProcessor T6424358
 * @compile -processor T6424358 -proc:only T6424358.java
 */

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

@interface TestMe {}

public class T6424358 extends JavacTestingAbstractProcessor {
    @TestMe enum Test { FOO; }

    public boolean process(Set<? extends TypeElement> annotations,
                           RoundEnvironment roundEnvironment) {
        final Messager log = processingEnv.getMessager();
        final Elements elements = processingEnv.getElementUtils();
        final TypeElement testMe = elements.getTypeElement("TestMe");
        class Scan extends ElementScanner<Void,Void> {
            @Override
            public Void visitExecutable(ExecutableElement e, Void p) {
                System.err.println("Looking at " + e);
                if ("values".contentEquals(e.getSimpleName()) &&
                    e.getModifiers().contains(Modifier.FINAL)) {
                    log.printMessage(ERROR, "final modifier on values()", e);
                    throw new AssertionError("final modifier on values()"); // See bug 6403468
                }
                return null;
            }
        }
        Scan scan = new Scan();
        for (Element e : roundEnvironment.getElementsAnnotatedWith(testMe))
            scan.scan(e);
        return true;
    }
}