Re: problem with serialization

Hi Dave,
thank you!
It would be nice if you fix it. I had some problems with compiling , I
would be very happy if could send me a new jar.

chris

Dave Cramer wrote:

> That is definately a bug. Chris; do you have a way to compile the
> source? I can fix it and provide you with a driver to test if you need
> ?Dave
>
> -----Original Message-----
> From: Nandu [mailto:cr_nandu(at)yahoo(dot)com]
> Sent: July 26, 2001 4:32 AM
> To: candreol; Dave(at)micro-automation(dot)net;
> pgsql-jdbc(at)postgresql(dot)org
> Subject: RE: [JDBC] problem with serialization
>
> I think i know the problem, as the Serialise class of
> postgres there is a line of code which will never work.It is
> like:if(!rs.next()) { // they print something here
> like System.out.println(" Driver Manager: " +
> rs.getString()) //which will always be null because
> getString() will return null when rs.next() == false}I feel
> that it is a bug with the Serialise implementation in
> postgresComment that line out and u won't get Null pointer
> problem.Cheers,Nandu.
>
> -----Original Message:
> pgsql-jdbc-owner(at)postgresql(dot)org
> [mailto:pgsql-jdbc-owner(at)postgresql(dot)org]On Behalf
> Of candreol
> Sent: 26 July 2001 07:35
> To: Dave(at)micro-automation(dot)net;
> pgsql-jdbc(at)postgresql(dot)org
> Subject: Re: [JDBC] problem with serialization
>
> Hi Dave,
>
> The code is very small. It is just a test :
>
> /*
> * Java sample program
> */
>
> import java.io.*;
> import java.sql.*;
> import org.postgresql.util.Serialize;
>
> public class lili implements Serializable
>
> {
>
> String myString;
> int myNumber;
>
> public lili() throws
> ClassNotFoundException, FileNotFoundException,
> IOException, SQLException
> {
>
> myString="theString";
> myNumber=4;
> }
>
> private void testmethod(){};
> public void testmethod2x(){};
>
> public static void main(String args[])
>
> {
> try {
> lili mylili = new lili();
>
> Class.forName("org.postgresql.Driver"); //
> load database interface
>
>
> // connect to the database
> org.postgresql.Connection conn =
> (org.postgresql.Connection)DriverManager.getConnection("jdbc:postgresql://localhost:5432/onlinechess",
> "postgres", "mypassword"); // works
> // test of serialisation
> org.postgresql.util.Serialize.create(conn,
> mylili); // makes problems
>
>
> } catch(Exception exc)
> {
> System.err.println("Exception
> caught.\n" + exc);
> exc.printStackTrace();
> }
> }
> }
>
>
>
>
>
>
>
>
> Dave Cramer wrote:
>
> > Chris,
> >
> > Can you send us your code. Or a snippet?
> >
> > Dave
> >
>
>
>
>
>
> >
> > Hi! I am new here.
> >
> > I did a small test to try object serialization
> > with the
> > org.postgresql.util.Serialize class.
> >
> > I get the following exception when I try to use
> > the at
> > org.postgresql.util.Serialize.create Method. :
> >
> > java.lang.NullPointerException
> > at
> > org.postgresql.jdbc2.ResultSet.getString(ResultSet.java:148)
> >
> > at
> > org.postgresql.util.Serialize.create(Serialize.java:241)
> >
> > at
> > org.postgresql.util.Serialize.create(Serialize.java:220)
> >
> > I looked at create in Serialization.java and
> > saw that
> > the exception occurs at getString although I
> > have no table corresponding
> > to the class I want to serialize.
> > if(!rs.next()){
> > // String lolo=rs.getString(1);}
> > }
> >
> > Although the resultset is empty (because the
> > table is absent) , why
> > getString has been run ?
> >
> > Can you help me ?
> >
> > Chris
> >
> > ---------------------------(end of
> > broadcast)---------------------------
> > TIP 6: Have you searched our list archives?
> >
> > http://www.postgresql.org/search.mpl
>