1/*
2 * Copyright (c) 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
24import java.lang.module.Configuration;
25import java.lang.module.ModuleFinder;
26import java.lang.reflect.Method;
27import java.net.URL;
28import java.net.URLClassLoader;
29import java.nio.file.Path;
30import java.nio.file.Paths;
31import java.util.Set;
32
33public class TestLayer {
34    private static final Path MODS_DIR = Paths.get("mods");
35    private static final Set<String> modules = Set.of("m1", "m2");
36
37    public static void main(String[] args) throws Exception {
38        // disable security manager until Class.forName is called.
39        SecurityManager sm = System.getSecurityManager();
40        if (sm != null) {
41            System.setSecurityManager(null);
42        }
43
44        ModuleFinder finder = ModuleFinder.of(MODS_DIR);
45
46        Configuration parent = ModuleLayer.boot().configuration();
47        Configuration cf = parent.resolveAndBind(ModuleFinder.of(),
48                                                 finder,
49                                                 modules);
50
51        ClassLoader scl = ClassLoader.getSystemClassLoader();
52        ModuleLayer layer = ModuleLayer.boot().defineModulesWithManyLoaders(cf, scl);
53
54        Module m1 = layer.findModule("m1").get();
55        Module m2 = layer.findModule("m2").get();
56
57        if (sm != null) {
58            System.setSecurityManager(sm);
59        }
60
61        // find exported and non-exported class from a named module
62        findClass(m1, "p1.A");
63        findClass(m1, "p1.internal.B");
64        findClass(m2, "p2.C");
65
66        // find class from unnamed module
67        ClassLoader ld = TestLayer.class.getClassLoader();
68        findClass(ld.getUnnamedModule(), "TestDriver");
69
70        // check if clinit should not be initialized
71        // compile without module-path; so use reflection
72        Class<?> c = Class.forName(m1, "p1.Initializer");
73        Method m = c.getMethod("isInited");
74        Boolean isClinited = (Boolean) m.invoke(null);
75        if (isClinited.booleanValue()) {
76           throw new RuntimeException("clinit should not be invoked");
77        }
78    }
79
80    static Class<?> findClass(Module module, String cn) {
81        Class<?> c = Class.forName(module, cn);
82        if (c == null) {
83            throw new RuntimeException(cn + " not found in " + module);
84        }
85        if (c.getModule() != module) {
86            throw new RuntimeException(c.getModule() + " != " + module);
87        }
88        return c;
89    }
90}
91