test/jdk/java/io/Serializable/misplacedArrayClassDesc/MisplacedArrayClassDesc.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 */

/* @test
 * @bug 6313687
 * @summary Verify that if the class descriptor for an ordinary object is the
 *          descriptor for an array class, an ObjectStreamException is thrown.
 *
 */

import java.io.*;

class TestArray implements Serializable {
    private static final long serialVersionUID = 1L;

    // size of array
    private static final int ARR_SIZE = 5;
    // serializable field
    private String[] strArr = new String[ARR_SIZE];

    public TestArray() {
        for (int i = 0; i < ARR_SIZE; i++) {
            strArr[i] = "test" + i;
        }
    }
}

public class MisplacedArrayClassDesc {
    public static final void main(String[] args) throws Exception {
       System.err.println("\nRegression test for CR6313687");
       TestArray object = new TestArray();
       try {
           // Serialize to a byte array
           ByteArrayOutputStream bos = new ByteArrayOutputStream() ;
           ObjectOutputStream out = new ObjectOutputStream(bos) ;
           out.writeObject(object);
           out.close();

           // Get the bytes of the serialized object
           byte[] buf = bos.toByteArray();
           for (int i = 0; i < buf.length; i++) {
               if (buf[i] == ObjectOutputStream.TC_ARRAY) {
                   buf[i] = ObjectOutputStream.TC_OBJECT;
                   break;
               }
           }

           // Deserialize from a byte array
           ByteArrayInputStream bais = new ByteArrayInputStream(buf);
           ObjectInputStream in = new ObjectInputStream(bais);
           TestArray ta = (TestArray) in.readObject();
           in.close();
       } catch (InstantiationError e) {
            throw new Error();
       } catch (InvalidClassException e) {
            System.err.println("\nTest passed");
            return;
       }
       throw new Error();
    }
}