1 /**
   2  * Copyright (c) 2015, 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  * Used with --patch-module to exercise the replacement or addition of classes
  26  * in modules that are linked into the runtime image.
  27  */
  28 
  29 package jdk.test;
  30 
  31 import java.lang.reflect.Module;
  32 
  33 public class Main {
  34 
  35     public static void main(String[] args) throws Exception {
  36 
  37         for (String moduleAndClass : args[0].split(",")) {
  38             String mn = moduleAndClass.split("/")[0];
  39             String cn = moduleAndClass.split("/")[1];
  40 
  41             // load class
  42             Class<?> c = Class.forName(cn);
  43 
  44             // check in expected module
  45             Module m = c.getModule();
  46             assertEquals(m.getName(), mn);
  47 
  48             // instantiate object
  49             Main.class.getModule().addReads(m);
  50             Object obj = c.newInstance();
  51 
  52             // check that the expected version of the class is loaded
  53             System.out.print(moduleAndClass);
  54             String s = obj.toString();
  55             System.out.println(" says " + s);
  56             assertEquals(s, "hi");
  57 
  58             // check Module getResourceAsStream
  59             String rn = cn.replace('.', '/') + ".class";
  60             assertNotNull(m.getResourceAsStream(rn));
  61         }
  62     }
  63 
  64 
  65     static void assertEquals(Object o1, Object o2) {
  66         if (!o1.equals(o2))
  67             throw new RuntimeException("assertion failed");
  68     }
  69 
  70     static void assertNotNull(Object o) {
  71         if (o == null)
  72             throw new RuntimeException("unexpected null");
  73     }
  74 }