jdk-24/test/jdk/java/lang/annotation/ParameterAnnotations.java

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/*
 * @test
 * @bug 6761678 8162817
 * @summary Check properties of Annotations returned from getParameterAnnotations
 * @run main ParameterAnnotations
 * @author Martin Buchholz
 */

import java.lang.annotation.Annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Method;

@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.FIELD, ElementType.PARAMETER })
@interface Named {
  String value();
}

public class ParameterAnnotations {

    public void nop(@Named("foo") Object foo,
                    @Named("bar") Object bar) {
    }

    void test(String[] args) throws Throwable {
        for (Method m : thisClass.getMethods()) {
            if (m.getName().equals("nop")) {
                Annotation[][] ann = m.getParameterAnnotations();
                equal(ann.length, 2);
                Annotation foo = ann[0][0];
                Annotation bar = ann[1][0];
                equal(foo.toString(), "@Named(\"foo\")");
                equal(bar.toString(), "@Named(\"bar\")");
                check(foo.equals(foo));
                check(! foo.equals(bar));
            }
        }
    }

    //--------------------- Infrastructure ---------------------------
    volatile int passed = 0, failed = 0;
    void pass() {passed++;}
    void fail() {failed++; Thread.dumpStack();}
    void fail(String msg) {System.err.println(msg); fail();}
    void unexpected(Throwable t) {failed++; t.printStackTrace();}
    void check(boolean cond) {if (cond) pass(); else fail();}
    void equal(Object x, Object y) {
        if (x == null ? y == null : x.equals(y)) pass();
        else fail(x + " not equal to " + y);}
    static Class<?> thisClass = new Object(){}.getClass().getEnclosingClass();
    public static void main(String[] args) throws Throwable {
        try {thisClass.getMethod("instanceMain",String[].class)
                .invoke(thisClass.newInstance(), (Object) args);}
        catch (Throwable e) {throw e.getCause();}}
    public void instanceMain(String[] args) throws Throwable {
        try {test(args);} catch (Throwable t) {unexpected(t);}
        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
        if (failed > 0) throw new AssertionError("Some tests failed");}
}