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

/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

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.Label;
import jdk.jfr.MetadataDefinition;
import jdk.jfr.Relational;
import jdk.jfr.ValueDescriptor;
import jdk.test.lib.Asserts;
import jdk.test.lib.jfr.Events;

/*
 * @test
 * @key jfr
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.metadata.annotations.TestRelational
 */
public class TestRelational {

    @MetadataDefinition
    @Label("User Id")
    @Relational
    @Target({ ElementType.FIELD })
    @Retention(RetentionPolicy.RUNTIME)
    @interface UserId {
    }

    static class UserEvent extends Event {
        @UserId
        String id;
    }

    public static void main(String[] args) throws Exception {
        EventType t = EventType.getEventType(UserEvent.class);
        ValueDescriptor field = t.getField("id");
        AnnotationElement userId = Events.getAnnotation(field, UserId.class);
        Relational r = userId.getAnnotation(Relational.class);
        Asserts.assertTrue(r != null, "Expected relational annotation to have annotation @Relational");
    }
}