site_archiver@lists.apple.com Delivered-To: webobjects-dev@lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=YhxbhHFRuqyBAs687bnPSSF89MGBZOYGnshYhsXV/F+b++nnuhRmoC82MeXU35EtRUnEnRLnLKFQg+uk+xlspUeuivLjUiGxEg+y/QHnArY97DTt0Q6eqx0UB0sYRcE5J+whfSpFRPA8YVtJHgbq38imhzmtvhn4Cvs07lbR5Xo= ; Thank you very much, Jean. Experienced! :-) Sadly, I have to give up really working towards WO for now. I've been researching on it because I was thinking about it as my project topic. However, I failed to find someone who's developed in WO to be my advisor. So I'll have to now start searching for other topics. I'd love to get my hands dirty with WO when I got a chance, but probably not this semester. I have 3 classes now with my project, I also would like to audit a course on the design and development of WebLogic by a senior BEA System Engineer, and I'm working part time. So I don't think for now. Maybe later. Thank you guys. I'll be staying here just "watching" and hopefully some day I'll really try WO out and back to many questions for you all. :-D I like it here because it's nice and responsive. Thank you, --Marina --- Jean-François Veillette <jean_francois_veillette@yahoo.ca> wrote:

In order to reimplement yourself accessor method, and have full control over that object, you need that entity to be represented as a custom class (not use the EOGenericRecord class). To ease working with custom class, it's recommended to use the generation gap pattern, use 'EOGenerator' (look on the net for it), it's a tool that will automate the use of that pattern.

Be carefull in reimplementing common accessor methods, take care not interfering with EOF ... you may end up fighting against EOF if your not doing it the EOF way. If your thinking to reimplement accessor methods just to reimplement the sql needed to do the fetch, then this is not 'EOF friendly' if that same attribute is told to be managed by eof. You usually do not reimplement accessor methods but add more methods instead. Add more method to an object so that it's no longer just a value holder, it become a full business logic object.

...

Both "Struct" and "JGeometry" are in a sdoapi.jar provided by Oracle, meaning they are proprietary. It also has to use PreparedStatement other than just normal resultset or one simple SQL script. This is what make me really doubt it that EOF can handle it all by itself. You'll have to be able to actually modify the generated Enterprise Object file to do this.

To use JGeometry and any other custom object structure, look at custom data type. You would have to tell eof how to transform the binary received from the DB to an object on the java side.

file:///Developer/Documentation/WebObjects/UsingEOModeler/

4WorkingWithAttributes/index.html look around "custom value class for an attribute" and related topics. I have never used custom value class for such use, I have used it in a more conservative way and it worked well. If I was facing your challenge, this is where I would start looking.

If custom value class can't do the job for your needs, then I guess you would need to look at the access layer of eof, ultimately look at the jdbc (and plugin) layer itself. I hope you do not have to go there.

- jfv

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