Hi

I am using Hibernate 2.1 and Midllegen 2.1. The Middlegen plugin for Hibernate generates all the POJOs. Some of theses POJOs have child collections defined as 'Set'. This collections to make it as Set is a default behavior of Middlegen tool. I was wondering if any of you have changed to a 'List' ? I think the 'List' will give a better way for clients to sort it. At present, we need to change it to the List explicitly.

Thanks
Ron

Hi,

take a look at the hibernate.vm inside the Hibernate-plugin.jar There you might change the render behaviour from Set to List or even List<E>.

True - you can change the set to List but you need to workout the index .
A quick hack is easy but doing it correctly if much more difficult. If you do a good job of it I would be interested in the patch so I can consider commiting it.

Hi David

true I also thought it was quite easy to change the behaviour of the render and thx for the response in the other thread.
The problem of the Index isn't quite clear to me. I know it'll be nice to have a sorted List instead of a unsorted one, but aren't the Sets also unsorted ?

See collections
http://www.hibernate.org/hib_docs/reference/en/html/collections.html

The list uses an index column to determine the position of the object.
So once issue is selecting the appropriate index column.
Second issue that the index column causes issues in dealing with bi-directional mappings.

Sets don't have either of these issues thus I left it as a future exercise (to the reader).

Oh ok the index tags haven't thought about them. Perhaps I might be able to do a spike next week, but not foresure short in time at the moment.

Ah, so there's no way of specifying the collection to use for relations in middlegen? This is exactly what I've been reading around to see how to do.

It also appears that mergefiles are not going to help here, right? Is there a way to override generated middlegen code with hand "corrected" hbm.xml tags?

cheers
merlyn

You could post process the HBM to modify the output. Having said that, its very easy to change the Velocity script to get the List instead of the Set which might satisfy your requirements. Its much more difficult to do it correctly for all the variations that can occur - hence why I have not done it.