[HARMONY-4996] [classlib][luni] Incorrect deserialization of Externalizable classes

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0M4
• Component/s: App-Oriented Bug Reports, Classlib
• Environment: Win XP
• Estimated Complexity: Moderate
• Assignee: Mikhail Markov
• Reporter: Mikhail Markov
• Created: 22/Oct/07 16:48
• Updated: 05/Dec/07 20:02
• Resolved: 05/Dec/07 20:02

Description

The testcase below passed on RI but failed on Harmony with the following stacktrace:
java.io.StreamCorruptedException: Wrong format: 0x0
at java.io.ObjectInputStream.readNonPrimitiveContent(ObjectInputStream.java:842)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:2128)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:283)
at Test.main(Test.java:18)

--------------------------- Test.java --------------------------------
import java.io.*;

public class Test {
static ObjectStreamClass[] objs = new ObjectStreamClass[1000];
static int pos = 0;

public static void main(String[] args) {
try

{ PipedOutputStream pout = new PipedOutputStream(); PipedInputStream pin = new PipedInputStream(pout); ObjectOutputStream oout = new TestObjectOutputStream(pout); oout.writeObject(new TestExtObject()); oout.writeObject("test"); oout.close(); pos = 0; ObjectInputStream oin = new TestObjectInputStream(pin); oin.readObject(); oin.readObject(); System.out.println("Done."); }

catch (Exception ex)

{ ex.printStackTrace(); }

}

public static class TestExtObject implements Externalizable {
public void writeExternal(ObjectOutput out) throws IOException

{ out.writeInt(10); }

public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException

{ in.readInt(); }

}

static class TestObjectOutputStream extends ObjectOutputStream {
public TestObjectOutputStream(OutputStream out) throws IOException

{ super(out); }

protected void writeClassDescriptor(ObjectStreamClass osc) throws IOException

{ objs[pos++] = osc; }

}

static class TestObjectInputStream extends ObjectInputStream {
public TestObjectInputStream(InputStream in) throws IOException

{ super(in); }

protected ObjectStreamClass readClassDescriptor() throws IOException, ClassNotFoundException

{ return (ObjectStreamClass) objs[pos++]; }

}
}
-------------------------------------------------------------------------

This test actually saves the incoming ObjectStreamClass-es in local array and does not write them to ObjectOutputStream (and takes them from this array in de-serialization). It seems like Externalizable class does not properly de-serialized as the exception occured during the next readObject() call.