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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * @test
  28  * @summary Test that if module m1 can read module m2, AND package p2 in m2 is
  29  *          exported qualifiedly to m1, then class p1.c1 in m1 can read p2.c2 in m2.
  30  * @modules java.base/jdk.internal.misc
  31  * @library /testlibrary /test/lib
  32  * @compile myloaders/MySameClassLoader.java
  33  * @compile p2/c2.java
  34  * @compile p1/c1.java
  35  * @build ExpQualToM1
  36  * @run main/othervm -Xbootclasspath/a:. ExpQualToM1
  37  */
  38 
  39 import static jdk.test.lib.Asserts.*;
  40 
  41 import java.lang.reflect.Layer;
  42 import java.lang.module.Configuration;
  43 import java.lang.module.ModuleDescriptor;
  44 import java.lang.module.ModuleFinder;
  45 import java.util.HashMap;
  46 import java.util.Map;
  47 import java.util.Set;
  48 import myloaders.MySameClassLoader;
  49 
  50 public class ExpQualToM1 {
  51 
  52     // Create a Layer over the boot layer.
  53     // Define modules within this layer to test access between
  54     // publically defined classes within packages of those modules.
  55     public void createLayerOnBoot() throws Throwable {
  56 
  57         // Define module:     m1
  58         // Can read:          java.base, m2
  59         // Packages:          p1
  60         // Packages exported: p1 is exported unqualifiedly
  61         ModuleDescriptor descriptor_m1 =
  62                 new ModuleDescriptor.Builder("m1")
  63                         .requires("java.base")
  64                         .requires("m2")
  65                         .exports("p1")
  66                         .build();
  67 
  68         // Define module:     m2
  69         // Can read:          java.base
  70         // Packages:          p2
  71         // Packages exported: p2 is exported qualifiedly to m1
  72         ModuleDescriptor descriptor_m2 =
  73                 new ModuleDescriptor.Builder("m2")
  74                         .requires("java.base")
  75                         .exports("p2", "m1")
  76                         .build();
  77 
  78         // Set up a ModuleFinder containing all modules for this layer.
  79         ModuleFinder finder = ModuleLibrary.of(descriptor_m1, descriptor_m2);
  80 
  81         // Resolves "m1"
  82         Configuration cf = Layer.boot()
  83                 .configuration()
  84                 .resolveRequires(finder, ModuleFinder.of(), Set.of("m1"));
  85 
  86         // map each module to the same class loader for this test
  87         Map<String, ClassLoader> map = new HashMap<>();
  88         map.put("m1", MySameClassLoader.loader1);
  89         map.put("m2", MySameClassLoader.loader1);
  90 
  91         // Create Layer that contains m1 & m2
  92         Layer layer = Layer.boot().defineModules(cf, map::get);
  93 
  94         assertTrue(layer.findLoader("m1") == MySameClassLoader.loader1);
  95         assertTrue(layer.findLoader("m2") == MySameClassLoader.loader1);
  96 
  97         // now use the same loader to load class p1.c1
  98         Class p1_c1_class = MySameClassLoader.loader1.loadClass("p1.c1");
  99         try {
 100             p1_c1_class.newInstance();
 101         } catch (IllegalAccessError e) {
 102             throw new RuntimeException("Test Failed, an IAE should not be thrown since p2 is exported qualifiedly to m1");
 103         }
 104     }
 105 
 106     public static void main(String args[]) throws Throwable {
 107       ExpQualToM1 test = new ExpQualToM1();
 108       test.createLayerOnBoot();
 109     }
 110 
 111 }