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 * Copyright (c) 2015, 2024, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package jdk.dynalink.linker;

import java.security.Permission;
import java.util.List;
import java.util.ServiceLoader;
import java.util.function.Supplier;
import jdk.dynalink.DynamicLinkerFactory;

/**
 * A class acting as a supplier of guarding dynamic linkers that can be
 * automatically loaded by other language runtimes. Language runtimes wishing
 * to export their own linkers should subclass this class and implement the
 * {@link #get()} method to return a list of exported linkers and declare the
 * subclass in
 * {@code /META-INF/services/jdk.dynalink.linker.GuardingDynamicLinkerExporter}
 * resource of their distribution (typically, JAR file) so that dynamic linker
 * factories can discover them using the {@link ServiceLoader} mechanism.
 * @see DynamicLinkerFactory#setClassLoader(ClassLoader)
 * @since 9
 */
public abstract class GuardingDynamicLinkerExporter implements Supplier<List<GuardingDynamicLinker>> {
    /**
     * The name of the runtime permission for creating instances of this class.
     * @apiNote
     * This permission cannot be used for controlling access to resources
     * anymore as the Security Manager is no longer supported.
     */
    public static final String AUTOLOAD_PERMISSION_NAME = "dynalink.exportLinkersAutomatically";

    /**
     * Creates a new linker exporter.
     */
    protected GuardingDynamicLinkerExporter() {
    }
}