1 /*

     2  * Copyright (c) 2013, 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 @test

    26 @bug 8009742

    27 @summary Bad method name: Serialized lambda in a constructor or class init

    28 */

    29 

    30 import java.io.*;

    31 import java.lang.reflect.Method;

    32 

    33 public class SerializedLambdaInInit {

    34     static int assertionCount = 0;

    35 

    36     static void assertTrue(boolean cond) {

    37         assertionCount++;

    38         if (!cond)

    39             throw new AssertionError();

    40     }

    41 

    42     static LSI cvisi = z -> "[" + z + "]";

    43     static LSI cisi;

    44 

    45     static {

    46         cisi = z -> z + z;

    47     }

    48 

    49     LSI ivsi = z -> "blah";

    50     LSI iisi;

    51 

    52     SerializedLambdaInInit() {

    53         iisi = z -> "*" + z;

    54     }

    55 

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

    57         try {

    58             // Write lambdas out

    59             ByteArrayOutputStream baos = new ByteArrayOutputStream();

    60             ObjectOutput out = new ObjectOutputStream(baos);

    61             SerializedLambdaInInit slii = new SerializedLambdaInInit();

    62 

    63             write(out, cvisi );

    64             write(out, cisi );

    65             write(out, slii.ivsi );

    66             write(out, slii.iisi );

    67             out.flush();

    68             out.close();

    69 

    70             // Read them back

    71             ByteArrayInputStream bais =

    72                 new ByteArrayInputStream(baos.toByteArray());

    73             ObjectInputStream in = new ObjectInputStream(bais);

    74             readAssert(in, "[X]");

    75             readAssert(in, "XX");

    76             readAssert(in, "blah");

    77             readAssert(in, "*X");

    78             in.close();

    79 

    80             // Reflectively test for valid method names

    81             for (Method meth : slii.getClass().getDeclaredMethods()) {

    82                 checkIdentifier(meth.getName());

    83             }

    84         } catch (IOException e) {

    85             e.printStackTrace();

    86             throw e;

    87         }

    88         assertTrue(assertionCount == 4);

    89     }

    90 

    91     static void write(ObjectOutput out, LSI lamb) throws IOException {

    92         out.writeObject(lamb);

    93     }

    94 

    95     static void readAssert(ObjectInputStream in, String expected)  throws IOException, ClassNotFoundException {

    96         LSI ls = (LSI) in.readObject();

    97         String result = ls.convert("X");

    98         System.out.printf("Result: %s\n", result);

    99         assertTrue(result.equals(expected));

   100     }

   101 

   102     public static void checkIdentifier(String str) throws Exception {

   103         // null and zero length identifers will throw their own exceptions

   104         char[] chars = str.toCharArray();

   105         if (!Character.isJavaIdentifierStart(chars[0])) {

   106             throw new IllegalArgumentException(str + ": bad identifier start character: '" + chars[0] + "'");

   107         }

   108         for (char ch : chars) {

   109             if (!Character.isJavaIdentifierPart(ch)) {

   110                 throw new IllegalArgumentException(str + ": bad identifier character: '" + ch + "'");

   111             }

   112         }

   113     }

   114 }

   115 

   116 interface LSI extends Serializable {

   117     String convert(String x);

   118 }