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 8004970

    27 @summary Lambda serialization

    28 

    29 */

    30 

    31 import java.io.*;

    32 

    33 public class LambdaSerialization {

    34 

    35     static int assertionCount = 0;

    36 

    37     static void assertTrue(boolean cond) {

    38         assertionCount++;

    39         if (!cond)

    40             throw new AssertionError();

    41     }

    42 

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

    44         try {

    45             // Write lambdas out

    46             ByteArrayOutputStream baos = new ByteArrayOutputStream();

    47             ObjectOutput out = new ObjectOutputStream(baos);

    48 

    49             write(out, z -> "[" + z + "]" );

    50             write(out, z -> z + z );

    51             write(out, z -> "blah" );

    52             out.flush();

    53             out.close();

    54 

    55             // Read them back

    56             ByteArrayInputStream bais =

    57                 new ByteArrayInputStream(baos.toByteArray());

    58             ObjectInputStream in = new ObjectInputStream(bais);

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

    60             readAssert(in, "XX");

    61             readAssert(in, "blah");

    62             in.close();

    63         } catch (IOException e) {

    64             e.printStackTrace();

    65             throw e;

    66         }

    67         assertTrue(assertionCount == 3);

    68     }

    69 

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

    71         out.writeObject(lamb);

    72     }

    73 

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

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

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

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

    78         assertTrue(result.equals(expected));

    79     }

    80 }

    81 

    82 interface LSI extends Serializable {

    83     String convert(String x);

    84 }