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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class A {
public static void main(String[] args) throws Exception {
A obj1 = new A();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeObject(obj1);
oos.close();
byte[] data = baos.toByteArray();
ByteArrayInputStream bais = new ByteArrayInputStream(data);
ObjectInputStream ois = new ObjectInputStream(bais);
Object o = ois.readObject();
int before = ((Persistable)obj1).getPersistableId();
int after = ((Persistable)o).getPersistableId();
if (before!=after)
System.out.println("The data was lost! before="+before+" after="+after);
else
System.out.println("It worked, data preserved!");
}
}
interface Persistable extends Serializable {
abstract public int getPersistableId();
}
aspect PersistableImpl {
declare parents: A extends Persistable;
final public int Persistable.persistableId = 42;
public int Persistable.getPersistableId() { return persistableId; }
}
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