I'm trying to persist an object with a map reference. The map implementatino is a DualHashBidiMap from commons-collections. It doesn't seem to behave. Every time I load the map hibernate deletes all of the rows and tries to recreate the map in the database. I assume this is because hibernate is unable to confirm that the map in the hydrated obect contains the data it should.

Is this supported?

Thanks

no.

but some work have been done just recently in hibernate3 cvs that might allow you to do it.

Thanks Max.

So is it true then that only java.util Collection mapping is supported? Might be a good note for the FAQ or the docs...

Some of those commons-collections classes are very nice and it would be great if they could be used.

its already in the docs - at least in Hibernate In Action.

but as i said - custom collection types is AFAIK supported in hibernate3.