1 /*
   2  * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.api.metadata.annotations;
  27 
  28 import java.lang.annotation.ElementType;
  29 import java.lang.annotation.Retention;
  30 import java.lang.annotation.RetentionPolicy;
  31 import java.lang.annotation.Target;
  32 
  33 import jdk.jfr.AnnotationElement;
  34 import jdk.jfr.Event;
  35 import jdk.jfr.EventType;
  36 import jdk.jfr.MetadataDefinition;
  37 import jdk.jfr.ValueDescriptor;
  38 import jdk.test.lib.Asserts;
  39 import jdk.test.lib.jfr.Events;
  40 
  41 /**
  42  * @test
  43  * @key jfr
  44  *
  45  * @library /lib /
  46  * @run main/othervm jdk.jfr.api.metadata.annotations.TestMetadata
  47  */
  48 public class TestMetadata {
  49 
  50     @Target({ ElementType.ANNOTATION_TYPE, ElementType.TYPE, ElementType.FIELD })
  51     @Retention(RetentionPolicy.RUNTIME)
  52     @interface OtherAnnotation {
  53     }
  54 
  55     @MetadataDefinition
  56     @SecondJFRAnnotation
  57     @Target({ ElementType.ANNOTATION_TYPE, ElementType.TYPE, ElementType.FIELD })
  58     @Retention(RetentionPolicy.RUNTIME)
  59     @interface FirstJFRAnnotation {
  60     }
  61 
  62     @MetadataDefinition
  63     @Target({ ElementType.ANNOTATION_TYPE, ElementType.TYPE, ElementType.FIELD })
  64     @Retention(RetentionPolicy.RUNTIME)
  65     @interface SecondJFRAnnotation {
  66     }
  67 
  68     @FirstJFRAnnotation
  69     @OtherAnnotation
  70     static class MetadataEvent extends Event {
  71         @OtherAnnotation
  72         @FirstJFRAnnotation
  73         String field;
  74     }
  75 
  76     public static void main(String[] args) throws Exception {
  77         EventType t = EventType.getEventType(MetadataEvent.class);
  78         ValueDescriptor field = t.getField("field");
  79         Events.hasAnnotation(field, FirstJFRAnnotation.class);
  80         Asserts.assertTrue(field.getAnnotation(OtherAnnotation.class) == null, "Only annotation annotated with @Metadata should exist");
  81 
  82         AnnotationElement a = Events.getAnnotationByName(t, FirstJFRAnnotation.class.getName());
  83         Asserts.assertTrue(a.getAnnotation(SecondJFRAnnotation.class) != null , "Annotations with @Metadata should be followed for indirect annotations");
  84     }
  85 }