Hello!

I have a general question about component-mapping. I would like to map the following class-structure:

Class1 with 2 members:

- member1
- member2

Both member have a "complex" class-structure, so I would like to map directly (with a key) to the corresponding tables for the classes. Maybe you can call it a 1:2 - mapping. First I tried the <component>-tag, but I think it is not useful for me. So far I understand the one-to-many - mappings described in the documentation, only works with lists/sets ...

I believe the solution is very easy, but I dont get it!

Thanks for help!

temp

Hello again! :-)

Because there is no answer yet:
Is my question not precise enough or to trivial ? :-)

Greetings

it is too vague for me to answer.
It seems like a component mapping indeed. Why is that not useful?

Or two many-to-one's. Please post your classes and the mapping files you have so far and what doesn't work.

Ok I will try to describe my problem more in detail:

I have a class "object", which has two attributes:



A "normal" component-mapping would look like this:


My problem is, that this attributes are polymorph "complex" classes, which should have a seperate table in the database! They haven´t not properties like normal string etc.
I would like to link the component by a key of the attribute-table, if this is possible!
Are many-to-ones relations only useful for lists,sets,etc. ?!


Problem 2:
Is it possible to map recursive class-structures? Maybe a class object, which itself has a component object?


Greetings

You are confusing many-to-one's and one-to-many's. Many-to-one's should work fine in your case.

Thanks! It seems, that this is the solution!

Only one short question:
Is cascading not possible with this approach? When I tried to save the "object" , the attributes were in transient state!

Yes, cascading is possible, use <many-to-one cascade="save-update" />.