test/jdk/jdk/jfr/api/metadata/annotations/TestExperimental.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package jdk.jfr.api.metadata.annotations;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import jdk.jfr.AnnotationElement;
import jdk.jfr.Event;
import jdk.jfr.EventType;
import jdk.jfr.Experimental;
import jdk.jfr.MetadataDefinition;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.Events;

/**
 * @test
 * @key jfr
 * @requires vm.hasJFR
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.metadata.annotations.TestExperimental
 */
public class TestExperimental {

    @MetadataDefinition
    @Experimental
    @Target({ ElementType.TYPE })
    @Retention(RetentionPolicy.RUNTIME)
    @interface ExperimentalAnnotation {
    }

    @ExperimentalAnnotation
    @Experimental
    static class ExperimentalEvent extends Event {
        @Experimental
        boolean experimentalField;
    }

    public static void main(String[] args) throws Exception {
        EventType t = EventType.getEventType(ExperimentalEvent.class);

        // @Experimental on event
        Experimental e = t.getAnnotation(Experimental.class);
        Asserts.assertTrue(e != null, "Expected @Experimental annotation on event");

        // @Experimental on annotation
        AnnotationElement a = Events.getAnnotationByName(t, ExperimentalAnnotation.class.getName());
        e = a.getAnnotation(Experimental.class);
        Asserts.assertTrue(e != null, "Expected @Experimental on annotation");

        // @Experimental on field
        a = Events.getAnnotation(t.getField("experimentalField"), Experimental.class);
        Asserts.assertTrue(e != null, "Expected @Experimental on field");
    }
}