src/java.base/share/classes/jdk/internal/module/ArchivedBootLayer.java - master - githubmirror/jdk22

src/java.base/share/classes/jdk/internal/module/ArchivedBootLayer.java

56 строк2 KB

Mark Reinhold

8256299: Implement JEP 396: Strongly Encapsulate JDK Internals by Default

09 дек 2020, 01:12

09 дек 2020, 01:12ed4c4ee

/*
 * 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 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);
    }
}