1 /*
   2  * Copyright (c) 2020, 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 pkg;
  25 
  26 import java.lang.invoke.MethodType;
  27 import java.lang.invoke.MethodHandles;
  28 import java.lang.invoke.MethodHandles.Lookup;
  29 import static java.lang.invoke.MethodHandles.Lookup.ClassOption.*;
  30 
  31 // This class is used by test HiddenGetModule.java.
  32 public class HasNamedModule {
  33 
  34     public static void compareModules(byte[] klassbuf) throws Throwable {
  35         String moduleName = HasNamedModule.class.getModule().toString();
  36         System.out.println("HasNamedModule module: " + moduleName);
  37         Lookup lookup = MethodHandles.lookup();
  38         Class<?> cl = lookup.defineHiddenClass(klassbuf, false, NESTMATE).lookupClass();
  39         if (cl.getModule() != HasNamedModule.class.getModule()) {
  40             System.out.println("HasNamedModule: " + moduleName +
  41                                ", hidden class module: " + cl.getModule());
  42             throw new RuntimeException("hidden class and lookup class have different modules");
  43         }
  44         if (!moduleName.contains("HiddenModule")) {
  45             throw new RuntimeException("wrong module name: " + moduleName);
  46         }
  47     }
  48 }