1 /*

     2  * Copyright (c) 2015, 2018, 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 /**

    26  * Tests loading an archived class that has the same class name as one in the

    27  * jimage. The class should normally fail to load since a classpath class is not

    28  * allowed to have the same package name as a module in the jimage. However,

    29  * if --limit-modules was used then archived class should be loaded.

    30  */

    31 

    32 package jdk.test;

    33 

    34 public class Main {

    35     static final ClassLoader BOOT_LOADER     = null;

    36     static final ClassLoader PLATFORM_LOADER = ClassLoader.getPlatformClassLoader();

    37     static final ClassLoader SYS_LOADER      = ClassLoader.getSystemClassLoader();

    38 

    39     public static void main(String[] args) throws Exception {

    40         boolean shouldLoad = false;

    41         ClassLoader expectedLoader = SYS_LOADER;

    42 

    43         /*

    44          * 3 Arguments are passed to this test:

    45          *   1. testName: Name of the test being run.

    46          *   2. className: Name of the class to load and instantiate.

    47          *   3. shouldLoad: Either "true" or "false" to indicate whether the class should

    48          *      successfully load ("true" indicates --limit-modules was used.)

    49          * The 4th argument is optional. It specifies the classloader.

    50          */

    51 

    52         assertTrue(args.length <= 4);

    53         String testName = args[0];

    54         String className = args[1].replace('/', '.');

    55         String shouldLoadName = args[2];  // "true" or "false"

    56         String loaderName = "SYS";

    57         if (args.length == 4) {

    58             loaderName = args[3];

    59         }

    60 

    61         if (shouldLoadName.equals("true")) {

    62             shouldLoad = true;

    63         } else if (shouldLoadName.equals("false")) {

    64             shouldLoad = false;

    65         } else {

    66             assertTrue(false);

    67         }

    68 

    69         if (loaderName.equals("SYS")) {

    70             expectedLoader = SYS_LOADER;

    71         } else if (loaderName.equals("EXT")) {

    72             expectedLoader = PLATFORM_LOADER;

    73         } else if (loaderName.equals("BOOT")) {

    74             expectedLoader = BOOT_LOADER;

    75         }

    76 

    77         System.out.println(testName + ": class=" + className + " shouldLoad=" +

    78                            shouldLoadName + " by loader:" + expectedLoader);

    79 

    80         // Try to load the specified class with the default ClassLoader.

    81         Class<?> clazz = null;

    82         try {

    83             clazz = Class.forName(className);

    84         } catch (ClassNotFoundException e) {

    85             System.out.println(e);

    86         }

    87 

    88         if (clazz != null) {

    89             // class loaded

    90             if (shouldLoad) {

    91                 // Make sure we got the expected defining ClassLoader

    92                 ClassLoader actualLoader = clazz.getClassLoader();

    93                 if (actualLoader != expectedLoader) {

    94                     throw new RuntimeException(testName + " FAILED: " + clazz + " loaded by " + actualLoader +

    95                                                ", expected " + expectedLoader);

    96                 }

    97                 // Make sure we got the right version of the class. toString() of an instance

    98                 // of the overridden version of the class should return "hi".

    99                 if (actualLoader == SYS_LOADER) {

   100                     String s = clazz.newInstance().toString();

   101                     if (!s.equals("hi")) {

   102                         throw new RuntimeException(testName + " FAILED: toString() returned \"" + s

   103                                                    + "\" instead of \"hi\"" );

   104                     }

   105                 }

   106                 System.out.println(testName + " PASSED: class loaded as expected.");

   107             } else {

   108                 throw new RuntimeException(testName + " FAILED: class loaded, but should have failed to load.");

   109             }

   110         } else {

   111             // class did not load

   112             if (shouldLoad) {

   113                 throw new RuntimeException(testName + " FAILED: class failed to load.");

   114             } else {

   115                 System.out.println(testName + " PASSED: ClassNotFoundException thrown as expected");

   116             }

   117         }

   118     }

   119 

   120     static void assertTrue(boolean expr) {

   121         if (!expr)

   122             throw new RuntimeException("assertion failed");

   123     }

   124 }