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 import java.beans.BeanInfo;

    25 import java.beans.Introspector;

    26 import java.beans.MethodDescriptor;

    27 import java.io.File;

    28 import java.net.URL;

    29 import java.net.URLClassLoader;

    30 import java.nio.file.Files;

    31 import java.nio.file.Path;

    32 import java.nio.file.Paths;

    33 import java.nio.file.StandardCopyOption;

    34 import java.util.Arrays;

    35 

    36 /**

    37  * @test

    38  * @bug 8159696

    39  * @library /javax/swing/regtesthelpers

    40  * @compile ./stub/Stub.java

    41  * @run main/othervm -mx32M UnloadClassBeanInfo

    42  */

    43 public class UnloadClassBeanInfo {

    44 

    45     private static URLClassLoader loader;

    46 

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

    48         Class cl = getStub();

    49         System.out.println("cl.getClassLoader() = " + cl.getClassLoader());

    50         final BeanInfo beanInfo = Introspector.getBeanInfo(cl, Object.class);

    51         MethodDescriptor[] mds = beanInfo.getMethodDescriptors();

    52         System.out.println("mds = " + Arrays.toString(mds));

    53         loader.close();

    54         loader=null;

    55         cl=null;

    56         Util.generateOOME();

    57         mds = beanInfo.getMethodDescriptors();

    58         System.out.println("mds = " + Arrays.toString(mds));

    59     }

    60 

    61     /**

    62      * The Stub class is compiled by jtreg, but we want to move it so it is not

    63      * on the application classpath. We want to load it through a separate

    64      * classloader.

    65      */

    66     static Class<?> getStub() throws Exception {

    67         final String testclasses = System.getProperty("test.classes");

    68         final File subdir = new File(testclasses, "stub");

    69         subdir.mkdir();

    70 

    71         final Path src = Paths.get(testclasses, "Stub.class");

    72         final Path dest = subdir.toPath().resolve("Stub.class");

    73         Files.move(src, dest, StandardCopyOption.REPLACE_EXISTING);

    74 

    75         loader = new URLClassLoader(new URL[]{subdir.toURL()});

    76         return Class.forName("Stub", true, loader);

    77     }

    78 }