/*
 * Copyright (c) 2016, 2020, 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.internal;

import java.security.AccessControlContext;
import java.util.List;
import java.util.Map;

import jdk.jfr.AnnotationElement;
import jdk.jfr.Configuration;
import jdk.jfr.EventSettings;
import jdk.jfr.EventType;
import jdk.jfr.FlightRecorderPermission;
import jdk.jfr.Recording;
import jdk.jfr.SettingControl;
import jdk.jfr.SettingDescriptor;
import jdk.jfr.ValueDescriptor;
import jdk.jfr.internal.management.EventSettingsModifier;

Provides access to package private function in jdk.jfr.
 The static initializer in this class loads the Settings class, which will call setPrivateAccess(PrivateAccess) on this class, which can be used call to package protected methods. This is similar to how java.lang accesses package private methods in java.lang.reflect. /**
 * Provides access to package private function in jdk.jfr.
 * <p>
 * The static initializer in this class loads the Settings class, which will
 * call {@link #setPrivateAccess(PrivateAccess)} on this class, which can be
 * used call to package protected methods.
 *
 * This is similar to how java.lang accesses package private methods in
 * java.lang.reflect.
 */
public abstract class PrivateAccess {
    private volatile static PrivateAccess instance;

    public static PrivateAccess getInstance() {
        // Can't be initialized in <clinit> because it may
        // deadlock with FlightRecorderPermission.<clinit>
        if (instance == null) {
            // Will trigger
            // FlightRecorderPermission.<clinit>
            // which will call PrivateAccess.setPrivateAccess
            new FlightRecorderPermission(Utils.REGISTER_EVENT);
        }
        return instance;
    }

    public static void setPrivateAccess(PrivateAccess pa) {
        instance = pa;
    }

    public abstract Type getType(Object o);

    public abstract Configuration newConfiguration(String name, String label, String description, String provider, Map<String,String> settings, String contents);

    public abstract EventType newEventType(PlatformEventType eventTypes);

    public abstract AnnotationElement newAnnotation(Type annotationType, List<Object> values, boolean boot);

    public abstract ValueDescriptor newValueDescriptor(String name, Type fieldType, List<AnnotationElement> annotations, int dimension, boolean constantPool, String fieldName);

    public abstract PlatformRecording getPlatformRecording(Recording r);

    public abstract PlatformEventType getPlatformEventType(EventType eventType);

    public abstract boolean isConstantPool(ValueDescriptor v);

    public abstract String getFieldName(ValueDescriptor v);

    public abstract ValueDescriptor newValueDescriptor(Class<?> type, String name);

    public abstract SettingDescriptor newSettingDescriptor(Type type, String name, String def, List<AnnotationElement> aes);

    public abstract void setAnnotations(ValueDescriptor v, List<AnnotationElement> a);

    public abstract void setAnnotations(SettingDescriptor s, List<AnnotationElement> a);

    public abstract boolean isUnsigned(ValueDescriptor v);

    public abstract PlatformRecorder getPlatformRecorder();

    public abstract AccessControlContext getContext(SettingControl sc);

    public abstract EventSettings newEventSettings(EventSettingsModifier esm);
}