/*

 * 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.internal;

import java.util.List;

import java.util.Map;

import jdk.jfr.AnnotationElement;

import jdk.jfr.Configuration;

import jdk.jfr.EventType;

import jdk.jfr.FlightRecorderPermission;

import jdk.jfr.Recording;

import jdk.jfr.SettingDescriptor;

import jdk.jfr.ValueDescriptor;

/**

 * 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 FlightRecordeerPermission.<clinit>

        if (instance == null) {

            // Will trigger

            // FlightRecordeerPermission.<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();

}