🚀 go-pugleaf

Kevin Dean [TeamB] wrote:
> Patrick D. McAvoy wrote:
> 
>> Hello Java/JBuilder Gurus and other noble developers,
>>
>> I am working on a Java application that was developed several years 
>> ago using JBuilder 4 with Java 1.3. I am now assigned the task to 
>> upgrade the code to Java 5.0 using Eclipse 3.1.
>>
>> I have developed a project that implements Java 5.0 and incorporated 
>> the   support libraries needed from JBuilder 2005 to support the 
>> classes used in the code.
>>
>> I'm receiving a runtime error concerning the Borland class 
>> com.borland.dx.DataSet. An index is reported missing for the DataSet 
>> object when the object is instantiated.
>>
>> My research points me to the DataExpress API, and the class file named 
>> "DataSet". All of the reference material I'm encountering covers 
>> ODBC/JDBC  connectivity and processing, but nothing on the "plain" 
>> two-dimensional DataSet object that is coded in the application. Can 
>> anyone help me with this problem?
>>
>> I suspect that DataExpress API was introduced after JBuilder 4 (at 
>> least   the version that was used in my application), and therefore my 
>> code, and specifically the code involved in processing the "DataSet" 
>> class is "deprecated" somehow.
>>
>> Am I on the right track? This would imply that all DataSet objects 
>> implemented in this dinosaur application would require substantial 
>> rennovation.
>>
>> Yes? Do I have a major problem here, or is there a simple solution? 
>> Has the class named "DataSet" changed radically from JBuilder 4 to 
>> present, specifically around this type of "memory-resident two 
>> dimensional pseudo-database object"?
> 
> 
> I think that's the first time I've been classified as "noble", but I'll 
> take what I can get when I can get it.  ;-)
> 
> The original application was developed using the Borland DataExpress 
> components (DataSet is a core class in that library).  These components 
> have changed somewhat over the years (though they are for the most part 
> backwards compatible unless you're extending it yourself with custom 
> providers and resolvers) so there may be incompatibilities between the 
> way the application was written and the way DataExpress works now.
> 
> I'm pretty sure that Borland's licensing policy prohibits development 
> with their libraries in other tools, and while I have extensive 
> experience in DataExpress, I have none in Eclipse.  If you're going to 
> do this, I suggest first that you use the tool for which DataExpress was 
> developed, namely JBuilder.
> 
> Within JBuilder's help system, you'll find tutorials on developing 
> applications with DataExpress (see "Developing Database Applications" in 
> the help contents).  I suggest you get familiar with basic concepts 
> around DataExpress before attempting this port.
> 
> You also haven't provided enough information about the error.  Stack 
> traces are enormously helpful.  We don't do support by e-mail, so any 
> more information we ask for is always asked for here so that others can 
> share in the solution.
> 
> Finally, this is the wrong group for this.  Follow-up has been set to 
> b.p.jbuilder.database.
Thank you, Kevin.
I'm sorry for the mis-post. I'll seek follow-up in the database forum.

Regards,

PDM