Isn't it possible to choose wich collection you want to generate in your mapping file during the middlegen task?

The way I see it (correct me if I'm wrong) , he only creates sets. But I started from an application full of lists, so I want to make him generate bags or lists. I don't seem to find anything on this in the documentation. For this project I could manually change the <set> into <bag>. But with large projects that wouldn't be an option.

Currently this is not selectable. It is on my TODO list but it does not have a high priority at this point. The Set is selected since it can be used in all situations and is a good general choice. You have several options:
1) Modify the output
2) Modify the code generation velocity script to generate the List instead
3) Modify Middlegen so its all configurable and submit the patch.

I prefer that you select the last one :-) but I suspect the second choice is best in your situation.

If I had the time, I would gladly contribute. But I'm working on an essay on Hibernate now. So most of my attention goes to Hibernate itself. Perhaps after this essay or if I become ahead on schedule somehow.

An essay? :)

Just a small one.
As a graduating student I'm currently testing the performance of Hibernate vs other methods for a company. Including all different methods to build your Hibernate application, the different caching mechanisms, ... . Just to see if it can be used efficiently in projects for the company in the future. And off course I'll have to document all my conclusions.

mmm, what more can I say for now:

Keep up the good work !

Cool - Are you going to make it available?

In anycase, doing this type of research well is difficult. My thesis absorbed about a year of effort. I understand how time consuming it can be. I will appreciate any contributions if you find the time.

It is time consuming and sometimes difficult indeed. Sadly I only have 8 - 11 weeks for this.

At this point, I still want to make my work in english, but if I lack the time I'll have to make it in dutch. I can always translate it afterwards of course.

it sounds realy intressting, whitch alternatives do you compare?

I started with a regular JDBC application. My task is to make it completely working using Hibernate. While doing this I had to document all problems I encountered, the steps I used, the comparison, ... .

Since learning Hibernate was within these 8 weeks, it shall remain with this comparison I'm afraid. After this work, I'll hopefully be graduated and as Hibernate is really interesting I'll be testing some more on my own later.

At the moment I'm implementing and comparing the different caching systems.

Peter