BadSerialPersistentField.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * 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).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 */

/* @test
 * @bug 4387368
 * @summary Verify that object whose class declared a serial persistent field
 *          that does not match any actual field cannot be serialized via
 *          default serialization.
 */

import java.io.*;

class A implements Serializable {
    private static final ObjectStreamField[] serialPersistentFields = {
        new ObjectStreamField("nonexistent", int.class)
    };
}

class B implements Serializable {
    private static final ObjectStreamField[] serialPersistentFields = {
        new ObjectStreamField("mismatched", int.class)
    };
    private float mismatched;
}

class C implements Serializable {
    private static final ObjectStreamField[] serialPersistentFields = {
        new ObjectStreamField("existent", int.class)
    };
    private int existent;
}

public class BadSerialPersistentField {
    public static void main(String[] args) throws Exception {
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        ObjectOutputStream oout;

        oout = new ObjectOutputStream(bout);
        try {
            oout.writeObject(new A());
            throw new Error();
        } catch (InvalidClassException ex) {
        }

        oout = new ObjectOutputStream(bout);
        try {
            oout.writeObject(new B());
            throw new Error();
        } catch (InvalidClassException ex) {
        }

        oout = new ObjectOutputStream(bout);
        oout.writeObject(new C());
    }
}