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 
  24 /*
  25  * @test
  26  * @modules java.base/jdk.internal.misc
  27  * @library /testlibrary /test/lib /compiler/whitebox ..
  28  * @compile p2/c2.java
  29  * @compile p1/c1.java
  30  * @build sun.hotspot.WhiteBox
  31  * @compile/module=java.base java/lang/reflect/ModuleHelper.java
  32  * @run main ClassFileInstaller sun.hotspot.WhiteBox
  33  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  34  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI ExportTwice
  35  */
  36 
  37 import java.lang.reflect.Module;
  38 import static jdk.test.lib.Asserts.*;
  39 
  40 public class ExportTwice {
  41 
  42     // Check that a package can not be exported unqualifiedly, and then exported
  43     // to a specific package.
  44     // Also, check that a package can be exported to a specific package and then
  45     // exported unqualifiedly.
  46     public static void main(String args[]) throws Throwable {
  47         Object m1, m2, m3;
  48 
  49         // Get the java.lang.reflect.Module object for module java.base.
  50         Class jlObject = Class.forName("java.lang.Object");
  51         Object jlObject_jlrM = jlObject.getModule();
  52         assertNotNull(jlObject_jlrM, "jlrModule object of java.lang.Object should not be null");
  53 
  54         // Get the class loader for ExportTwice and assume it's also used to
  55         // load classes p1.c1 and p2.c2.
  56         ClassLoader this_cldr = ExportTwice.class.getClassLoader();
  57 
  58         // Define a module for p1.
  59         m1 = ModuleHelper.ModuleObject("module1", this_cldr, new String[] { "p1" });
  60         assertNotNull(m1, "Module should not be null");
  61         ModuleHelper.DefineModule(m1, "9.0", "m1/here", new String[] { "p1" });
  62         ModuleHelper.AddReadsModule(m1, jlObject_jlrM);
  63 
  64         // Define a module for p2.
  65         m2 = ModuleHelper.ModuleObject("module2", this_cldr, new String[] { "p2" });
  66         assertNotNull(m2, "Module should not be null");
  67         ModuleHelper.DefineModule(m2, "9.0", "m2/there", new String[] { "p2" });
  68         ModuleHelper.AddReadsModule(m2, jlObject_jlrM);
  69 
  70         // Define a module for p3.
  71         m3 = ModuleHelper.ModuleObject("module3", this_cldr, new String[] { "p3" });
  72         assertNotNull(m3, "Module should not be null");
  73         ModuleHelper.DefineModule(m3, "9.0", "m3/there", new String[] { "p3" });
  74         ModuleHelper.AddReadsModule(m3, jlObject_jlrM);
  75 
  76         // Make package p1 in m1 visible to everyone.
  77         ModuleHelper.AddModuleExportsToAll(m1, "p1");
  78 
  79         // Try to export p1 only to m2 after it was exported unqualifiedly.  It
  80         // should silently succeed.
  81         ModuleHelper.AddModuleExports(m1, "p1", m2);
  82 
  83         // Export p2 to m3 then export it again unqualifiedly.
  84         ModuleHelper.AddModuleExports(m2, "p2", m3);
  85         ModuleHelper.AddModuleExportsToAll(m2, "p2");
  86 
  87         // p1.c1's ctor tries to call a method in p2.c2.  This should work because
  88         // p1's module can read p2's module and p2 is now exported unqualifiedly.
  89         ModuleHelper.AddReadsModule(m1, m2);
  90         Class p1_c1_class = Class.forName("p1.c1");
  91         p1_c1_class.newInstance();
  92     }
  93 }