1 /*

     2  * Copyright 2004 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @bug 5056248

    27  * @summary Test that an MBeanInfo works even if it is deserialized from

    28  * an implementation where its array fields can be null.

    29  * @author Eamonn McManus

    30  * @run clean NullInfoArraysTest

    31  * @run build NullInfoArraysTest

    32  * @run main NullInfoArraysTest

    33  */

    34 

    35 import java.io.*;

    36 import javax.management.*;

    37 import javax.management.modelmbean.*;

    38 import javax.management.openmbean.*;

    39 

    40 public class NullInfoArraysTest {

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

    42         if (args.length > 0 && args[0].equals("write"))

    43             writeSerializedForms();

    44         else

    45             testSerializedForms();

    46     }

    47 

    48     private static void testSerializedForms() throws Exception {

    49         byte[][] serializedMBeanInfos =

    50             SerializedMBeanInfo.serializedMBeanInfos;

    51         for (int i = 0; i < serializedMBeanInfos.length; i++) {

    52             byte[] serializedMBeanInfo = serializedMBeanInfos[i];

    53             ByteArrayInputStream bis =

    54                 new ByteArrayInputStream(serializedMBeanInfo);

    55             ObjectInputStream ois = new ObjectInputStream(bis);

    56             MBeanInfo mbi = (MBeanInfo) ois.readObject();

    57 

    58             System.out.println("Testing a " +

    59                                mbi.getClass().getName() + "...");

    60 

    61             if (mbi.getAttributes() == null ||

    62                 mbi.getOperations() == null ||

    63                 mbi.getConstructors() == null ||

    64                 mbi.getNotifications() == null)

    65                 throw new Exception("At least one getter returned null");

    66 

    67             System.out.println("OK");

    68         }

    69 

    70         System.out.println("Test passed");

    71     }

    72 

    73     /* This method is intended to be invoked when constructing the

    74        test for the first time, with JMX 1.1 RI in the classpath.  It

    75        constructs the SerializedMBeanInfo.java source file.  There is

    76        of course a chicken-and-egg problem for compiling: the first

    77        time we built this test, we supplied a trivial

    78        SerializedMBeanInfo.java with an empty array in the

    79        serializedMBeanInfos field.  */

    80     private static void writeSerializedForms() throws Exception {

    81         OutputStream fos = new FileOutputStream("SerializedMBeanInfo.java");

    82         PrintWriter w = new PrintWriter(fos);

    83         w.println("// Generated by NullInfoArraysTest - do not edit");

    84         w.println();

    85         w.println("public class SerializedMBeanInfo {");

    86         w.println("    public static final byte[][] serializedMBeanInfos = {");

    87         writeSerial(w, new MBeanInfo(null, null, null, null, null, null));

    88         writeSerial(w, new ModelMBeanInfoSupport(null, null, null, null, null,

    89                                                  null, null));

    90         writeSerial(w, new OpenMBeanInfoSupport(null, null, null, null, null,

    91                                                 null));

    92         w.println("    };");

    93         w.println("}");

    94         w.close();

    95         fos.close();

    96         System.out.println("Wrote SerializedMBeanInfo.java");

    97     }

    98 

    99     private static void writeSerial(PrintWriter w, Object o) throws Exception {

   100         ByteArrayOutputStream bos = new ByteArrayOutputStream();

   101         ObjectOutputStream oos = new ObjectOutputStream(bos);

   102         oos.writeObject(o);

   103         oos.close();

   104         byte[] bytes = bos.toByteArray();

   105         w.print("        {");

   106         for (int i = 0; i < bytes.length; i++) {

   107             w.print(bytes[i]);

   108             w.print(", ");

   109         }

   110         w.println("},");

   111     }

   112 }