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From "Andrew Zhang" <zhanghuang...@gmail.com>
Subject Re: [classlib][sql] SerialJavaObject constructor throws SerialException when the object is unserializable?
Date Fri, 17 Nov 2006 10:51:13 GMT
On 11/17/06, Alexei Zakharov <alexei.zakharov@gmail.com> wrote:
>
> Hi,
>
> It is interesting question. What are advantages of such serialization
> model?


I dunno, but the spec maker knows. :)

IMHO majority of Java classes in the world have static fields.
> :-) What are usage patterns of this class?


Thanks,
>
> 2006/11/16, Andrew Zhang <zhanghuangzhu@gmail.com>:
> > On 11/13/06, Mikhail Loenko <mloenko@gmail.com> wrote:
> > >
> > > I guess that Sun has implemented some behavior and some exception
> > > could be thrown by that implementation.
> >
> >
> > Sorry for my late reply... Just back from travelling. :)
> >
> > I don't quite get the point. What does "that implementation" mean? Is it
> > invoked in SerialJavaObject constructor?
> >
> > Then they wrapped that exception
> > > by SerialException and documented in the spec ;)
> > >
> > > You might want to implement it without exception throwing and if we
> find
> > > an
> > > inconsistency later -- fix it
> >
> >
> > ya, I'd like to follow this way. If we find any problem, fix it then.
> :-)
> >
> > If no one objects, I'll ignore static/transient check in the
> constructor.
> > Thanks!
> >
> > Thanks,
> > > Mikhail
> > >
> > > 2006/11/12, Andrew Zhang <zhanghuangzhu@gmail.com>:
> > > > Hi folks,
> > > >
> > > > I'm confused by javax.sql.rowset.serial.SerialJavaObject spec. The
> spec
> > > of
> > > > SerialJavaObject constructor says "throws SerialException if the
> object
> > > is
> > > > found to be unserializable". It also mentions "Static or transient
> > > fields
> > > > cannot be serialized; an attempt to serialize them will result in a
> > > > SerialException object being thrown. ". Does it mean to throw
> > > > SerialException if the object doesn't implement Serializable or it
> > > contains
> > > > static/transient fields? I tried some tests[1], but SerialException
> is
> > > never
> > > > thrown. Am I missing something? Thank you in advance for your help!
> > > >
> > > > [1] SerialJavaObject constructor test case:
> > > >  public void test_Constructor() throws Exception {
> > > >  Object obj = new NonSerializableClass();
> > > >  SerialJavaObject sjo = new SerialJavaObject(obj);
> > > >  }
> > > >
> > > >  static class NonSerializableClass {
> > > >  public static int i;
> > > >  public static Thread t;
> > > >  public transient String s;
> > > >  NonSerializableClass() {
> > > >
> > > >  }
> > > >  }
>
>
> --
> Alexei Zakharov,
> Intel Enterprise Solutions Software Division
>



-- 
Best regards,
Andrew Zhang

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