Hello,

the last days i've been working on importing a tree structure using hibernate. The source is some CSV which will be imported periodically. The import works fine and what i need to do now is to log changes in the tree structure. Of course this could be done in the import code where the CSV gets transformed into a tree, but i am wondering if it possible to do this by using an EmptyInterceptor. By overriding #onSave and #onDelete i could detect, when an entity gets added or removed. By overriding #onFlushDirty i can detect changes of properties, but what i fail to log is when already existing elements gets moved in the hierarchy. As i am quite new to hibernate it may be simple, but i couldn't find there any information in the docs. So my questions is, how i could detect changes in associations.

Thanks in advance for any ideas!

GLA

Probably it's better to illustrate my question with some code. The entity class looks like this:



It is a article type, that holds a collection of sub types (subArticleTypes). The mapping looks like this:



Given the following situation: I have three article types with the ids 1, 2, 3, 4, whereas element 2 is a child of 1 and and 4 a child of 3 - Element 1 holds element 2 in the collection subArticleTypes. All elements are persisted. Then i add element 2 in 3 as sub type. How do i track this with an interceptor? EmptyInterceptor#onFlushDirty doesn't notice it.

Thanks in advance!

GLA