/*

 * Copyright (c) 2015, 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.

 *

 * 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.reflect;

import java.lang.module.ModuleDescriptor;

/**

 * A helper class intended to be injected into java.lang.reflect using the

 * java -Xpatch option. The helper class provides access to package private

 * methods in java.lang.reflect.Module.

 */

public final class ModuleHelper {

    private ModuleHelper() { }

    /**

     * Creates a named module but without defining the module to the VM.

     */

    public static Module newModule(ClassLoader loader, ModuleDescriptor descriptor) {

        return new Module(loader, descriptor);

    }

    /**

     * Updates module {@code from} to that it reads module {@code to} without

     * notifying the VM.

     */

    public static void addReadsNoSync(Module from, Module to) {

        from.implAddReadsNoSync(to);

    }

    /**

     * Updates module {@code from} so that it exports package {@code pkg}

     * to module {@code to} but without notifying the VM. If {@code to} is

     * {@code null} then the package is exported unconditionally.

     */

    public static void addExportsNoSync(Module from, String pkg, Module to) {

        from.implAddExportsNoSync(pkg, to);

    }

    /**

     * Adds a package to a module without notifying the VM.

     */

    public static void addPackageNoSync(Module m, String pkg) {

        m.implAddPackageNoSync(pkg);

    }

}