Re: problem with serialization - Mailing list pgsql-jdbc
From | candreol |
---|---|
Subject | Re: problem with serialization |
Date | |
Msg-id | 3B5FCE87.482FC970@consol.de Whole thread Raw |
In response to | problem with serialization (candreol <Christophe.Andreoli@consol.de>) |
Responses |
RE: problem with serialization
|
List | pgsql-jdbc |
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-----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.
From: Nandu [mailto:cr_nandu@yahoo.com]
Sent: July 26, 2001 4:32 AM
To: candreol; Dave@micro-automation.net; pgsql-jdbc@postgresql.org
Subject: RE: [JDBC] problem with serialization
-----Original Message: pgsql-jdbc-owner@postgresql.org [mailto:pgsql-jdbc-owner@postgresql.org]On Behalf Of candreolHi Dave,
Sent: 26 July 2001 07:35
To: Dave@micro-automation.net; pgsql-jdbc@postgresql.org
Subject: Re: [JDBC] problem with serialization
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?
pgsql-jdbc by date: