JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2019, 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.internal.consumer;

import java.io.IOException;
import java.util.Comparator;
import java.util.List;

import jdk.jfr.consumer.RecordedClass;
import jdk.jfr.consumer.RecordedClassLoader;
import jdk.jfr.consumer.RecordedEvent;
import jdk.jfr.consumer.RecordedFrame;
import jdk.jfr.consumer.RecordedMethod;
import jdk.jfr.consumer.RecordedObject;
import jdk.jfr.consumer.RecordedStackTrace;
import jdk.jfr.consumer.RecordedThread;
import jdk.jfr.consumer.RecordedThreadGroup;
import jdk.jfr.consumer.RecordingFile;
import jdk.jfr.internal.Type;
/*
 * Purpose of this class is to give package private access to
 * the jdk.jfr.consumer package
 */
public abstract class JdkJfrConsumer {

    private static JdkJfrConsumer instance;

    // Initialization will trigger setAccess being called
    private static void forceInitializetion() {
        try {
            Class<?> c = RecordedObject.class;
            Class.forName(c.getName(), true, c.getClassLoader());
        } catch (ClassNotFoundException e) {
            throw new InternalError("Should not happen");
        }
    }

    public static void setAccess(JdkJfrConsumer access) {
        instance = access;
    }

    public static JdkJfrConsumer instance() {
        if (instance == null) {
            forceInitializetion();
        }
        return instance;
    }

    public abstract List<Type> readTypes(RecordingFile file) throws IOException;

    public abstract boolean isLastEventInChunk(RecordingFile file);

    public abstract Object getOffsetDataTime(RecordedObject event, String name);

    public abstract RecordedClass newRecordedClass(ObjectContext objectContext, long id, Object[] values);

    public abstract RecordedClassLoader newRecordedClassLoader(ObjectContext objectContext, long id, Object[] values);

    public abstract RecordedStackTrace newRecordedStackTrace(ObjectContext objectContext, Object[] values);

    public abstract RecordedThreadGroup newRecordedThreadGroup(ObjectContext objectContext, Object[] values);

    public abstract RecordedFrame newRecordedFrame(ObjectContext objectContext, Object[] values);

    public abstract RecordedThread newRecordedThread(ObjectContext objectContext, long id, Object[] values);

    public abstract RecordedMethod newRecordedMethod(ObjectContext objectContext, Object[] values);


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