1 /*

     2  * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package java.lang.reflect;

    25 

    26 import java.lang.module.ModuleDescriptor;

    27 

    28 /**

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

    30  * java --patch-module option. The helper class provides access to package private

    31  * methods in java.lang.reflect.Module.

    32  */

    33 

    34 public final class ModuleHelper {

    35 

    36     private ModuleHelper() { }

    37 

    38     /**

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

    40      */

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

    42         return new Module(loader, descriptor);

    43     }

    44 

    45     /**

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

    47      * notifying the VM.

    48      */

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

    50         from.implAddReadsNoSync(to);

    51     }

    52 

    53     /**

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

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

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

    57      */

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

    59         from.implAddExportsNoSync(pkg, to);

    60     }

    61 

    62     /**

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

    64      */

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

    66         m.implAddPackageNoSync(pkg);

    67     }

    68 

    69 }