/*

 * Copyright (c) 2016, 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

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package jdk.jfr.api.consumer;

import static jdk.test.lib.Asserts.assertEquals;

import static jdk.test.lib.Asserts.assertFalse;

import static jdk.test.lib.Asserts.assertNotNull;

import static jdk.test.lib.Asserts.assertTrue;

import java.util.List;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.jfr.consumer.RecordedMethod;

import jdk.jfr.consumer.RecordedFrame;

import jdk.jfr.consumer.RecordedStackTrace;

import jdk.test.lib.jfr.Events;

/*

 * @test

 * @key jfr

 * @library /test/lib

 * @run main/othervm jdk.jfr.api.consumer.TestRecordedMethodDescriptor

 */

public final class TestRecordedMethodDescriptor {

    private static boolean isMainMethodDescriptorRecorded;

    private static final String MAIN_METHOD_DESCRIPTOR = "([Ljava/lang/String;)V";

    private static final String MAIN_METHOD_NAME = "main";

    public static void main(String[] args) throws Throwable {

        Recording recording = new Recording();

        recording.enable(MyEvent.class).withStackTrace();

        recording.start();

        MyEvent event = new MyEvent();

        event.begin();

        event.end();

        event.commit();

        recording.stop();

        List<RecordedEvent> recordedEvents = Events.fromRecording(recording);

        assertEquals(1, recordedEvents.size(), "Expected one event");

        RecordedEvent recordedEvent = recordedEvents.get(0);

        RecordedStackTrace stacktrace = recordedEvent.getStackTrace();

        List<RecordedFrame> frames = stacktrace.getFrames();

        assertFalse(frames.isEmpty(), "Stacktrace frames was empty");

        for (RecordedFrame frame : frames) {

            analyzeRecordedMethodDescriptor(frame.getMethod());

        }

        assertTrue(isMainMethodDescriptorRecorded, "main() method descriptor has never been recorded");

    }

    private static void analyzeRecordedMethodDescriptor(RecordedMethod method) {

        String descr = method.getDescriptor();

        assertNotNull(descr, "Method descriptor is null");

        String name = method.getName();

        assertNotNull(name, "Method name is null");

        if (name.equals(MAIN_METHOD_NAME) && descr.equals(MAIN_METHOD_DESCRIPTOR)) {

            assertFalse(isMainMethodDescriptorRecorded, "main() method descriptor already recorded");

            isMainMethodDescriptorRecorded = true;

        }

    }

    public static class MyEvent extends Event {

    }

}