/*
 * Copyright (c) 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */
package java.lang.invoke;

import jdk.internal.loader.BuiltinClassLoader;
import jdk.internal.misc.CDS;

final class LambdaProxyClassArchive {
    
Check if the class is loaded by a built-in class loader.
/**
     * Check if the class is loaded by a built-in class loader.
     */
    static boolean loadedByBuiltinLoader(Class<?> cls) {
        ClassLoader cl = cls.getClassLoader();
        return (cl == null || (cl instanceof BuiltinClassLoader)) ? true : false;
    }

    private static native void addToArchive(Class<?> caller,
                                            String invokedName,
                                            MethodType invokedType,
                                            MethodType samMethodType,
                                            MemberName implMethod,
                                            MethodType instantiatedMethodType,
                                            Class<?> lambdaProxyClass);

    private static native Class<?> findFromArchive(Class<?> caller,
                                                   String invokedName,
                                                   MethodType invokedType,
                                                   MethodType samMethodType,
                                                   MemberName implMethod,
                                                   MethodType instantiatedMethodType);

    
Registers the lambdaProxyClass into CDS archive.
The VM will store the lambdaProxyClass into a hash table
using the first six argumennts as the key.
CDS only archives lambda proxy class if it's not serializable
and no marker interfaces and no additional bridges, and if it is
loaded by a built-in class loader.
/**
     * Registers the lambdaProxyClass into CDS archive.
     * The VM will store the lambdaProxyClass into a hash table
     * using the first six argumennts as the key.
     *
     * CDS only archives lambda proxy class if it's not serializable
     * and no marker interfaces and no additional bridges, and if it is
     * loaded by a built-in class loader.
     */
    static boolean register(Class<?> caller,
                            String invokedName,
                            MethodType invokedType,
                            MethodType samMethodType,
                            MethodHandle implMethod,
                            MethodType instantiatedMethodType,
                            boolean isSerializable,
                            Class<?>[] markerInterfaces,
                            MethodType[] additionalBridges,
                            Class<?> lambdaProxyClass) {
        if (!CDS.isDumpingArchive())
            throw new IllegalStateException("should only register lambda proxy class at dump time");

        if (loadedByBuiltinLoader(caller) &&
            !isSerializable && markerInterfaces.length == 0 && additionalBridges.length == 0) {
            addToArchive(caller, invokedName, invokedType, samMethodType,
                         implMethod.internalMemberName(), instantiatedMethodType,
                         lambdaProxyClass);
            return true;
        }
        return false;
    }

    
Lookup a lambda proxy class from the CDS archive using the first
six arguments as the key.
CDS only archives lambda proxy class if it's not serializable
and no marker interfaces and no additional bridges, and if it is
loaded by a built-in class loader.
/**
     * Lookup a lambda proxy class from the CDS archive using the first
     * six arguments as the key.
     *
     * CDS only archives lambda proxy class if it's not serializable
     * and no marker interfaces and no additional bridges, and if it is
     * loaded by a built-in class loader.
     */
    static Class<?> find(Class<?> caller,
                         String invokedName,
                         MethodType invokedType,
                         MethodType samMethodType,
                         MethodHandle implMethod,
                         MethodType instantiatedMethodType,
                         boolean isSerializable,
                         Class<?>[] markerInterfaces,
                         MethodType[] additionalBridges) {
        if (CDS.isDumpingArchive())
            throw new IllegalStateException("cannot load class from CDS archive at dump time");

        if (!loadedByBuiltinLoader(caller) ||
            !CDS.isSharingEnabled() || isSerializable || markerInterfaces.length > 0 || additionalBridges.length > 0)
            return null;

        return findFromArchive(caller, invokedName, invokedType, samMethodType,
                               implMethod.internalMemberName(), instantiatedMethodType);
    }
}