jdk

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/*
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 * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package p1;
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import myloaders.MyDiffClassLoader;
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import p2.c2;
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public class c1ReadEdgeDiffLoader {
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    public c1ReadEdgeDiffLoader() {
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        // The goal is to establish a read edge between module m1x
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        // which is the module where p1.c1ReadEdgeDiffLoader is defined,
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        // and the unnamed module that defines p2.c2.  This must be
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        // done in 2 steps:
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        //
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        // Step #1: Establish a read edge between m1x, where c1ReadEdgeDiffLoader
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        //          is defined, and the System ClassLoader's unnamed module,
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        //          where MyDiffClassLoader is defined. This read edge
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        //          is needed before we can obtain MyDiffClassLoader.loader2's unnamed module.
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        //
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        // Step #2: Establish a read edge between m1x, where c1ReadEdgeDiffLoader
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        //          is defined, and the MyDiffClassLoader.loader2's unnamed module,
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        //          where p2.c2 will be defined.
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        // Step #1: read edge m1x -> System ClassLoader's unnamed module
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        Module m1x = c1ReadEdgeDiffLoader.class.getModule();
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        ClassLoader system_loader = ClassLoader.getSystemClassLoader();
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        Module unnamed_module_one = system_loader.getUnnamedModule();
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        m1x.addReads(unnamed_module_one);
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        // Step #2: read edge m1x -> MyDiffClassLoader.loader2's unnamed module
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        ClassLoader loader2 = MyDiffClassLoader.loader2;
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        Module unnamed_module_two = loader2.getUnnamedModule();
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        m1x.addReads(unnamed_module_two);
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        // Attempt access - access should succeed since m1x can read
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        //                  MyDiffClassLoader.loader2's unnamed module
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        p2.c2 c2_obj = new p2.c2();
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        c2_obj.method2();
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    }
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}
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