jfrJdkJfrEvent.hpp

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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#ifndef SHARE_JFR_SUPPORT_JFRJDKJFREVENT_HPP
#define SHARE_JFR_SUPPORT_JFRJDKJFREVENT_HPP

#include "jni.h"
#include "memory/allocation.hpp"
#include "utilities/exceptions.hpp"

class Klass;

//
// For convenient access to the event klass hierarchy:
//
//  - jdk.internal.event.Event (java.base)
//    - jdk.jfr.Event (jdk.jfr)
//      - sub klasses (...)
//
//  Although the top level klass is really jdk.internal.event.Event,
//  its role is primarily to allow event programming in module java.base.
//  We still call it the jdk.jfr.Event klass hierarchy, including
//  jdk.internal.event.Event.
//
class JdkJfrEvent : AllStatic {
 public:
  // jdk.jfr.Event
  static bool is(const Klass* k);
  static bool is(const jclass jc);
  static void tag_as(const Klass* k);

  // jdk.jfr.Event subklasses
  static bool is_subklass(const Klass* k);
  static bool is_subklass(const jclass jc);
  static void tag_as_subklass(const Klass* k);
  static void tag_as_subklass(const jclass jc);

  // jdk.jfr.Event hierarchy
  static bool is_a(const Klass* k);
  static bool is_a(const jclass jc);

  // klasses that host a jdk.jfr.Event
  static bool is_host(const Klass* k);
  static bool is_host(const jclass jc);
  static void tag_as_host(const Klass* k);
  static void tag_as_host(const jclass jc);

  // in the set of classes made visible to java
  static bool is_visible(const Klass* k);
  static bool is_visible(const jclass jc);

  // all klasses in the hierarchy
  static jobject get_all_klasses(TRAPS);
};

#endif // SHARE_JFR_SUPPORT_JFRJDKJFREVENT_HPP