/*

 * 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

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 */

package jdk.internal.module;

import jdk.internal.misc.CDS;

/**

 * Used by ModuleBootstrap for archiving the boot layer.

 */

class ArchivedBootLayer {

    private static ArchivedBootLayer archivedBootLayer;

    private final ModuleLayer bootLayer;

    private ArchivedBootLayer(ModuleLayer bootLayer) {

        this.bootLayer = bootLayer;

    }

    ModuleLayer bootLayer() {

        return bootLayer;

    }

    static ArchivedBootLayer get() {

        return archivedBootLayer;

    }

    static void archive(ModuleLayer layer) {

        archivedBootLayer = new ArchivedBootLayer(layer);

    }

    static {

        CDS.initializeFromArchive(ArchivedBootLayer.class);

    }

}