One-to-one-to-one direct to field mapping

Yes, I didn't mispelled, there IS a one-to-one-to-one relationship in the database I am mapping, don't ask me why!
To make it simple:
TABLE A (a,b, att1)
TABLE B (b,c, att2)
TABLE C (c, att3)
My Descriptor class is DescA.java with all attributes (String att1, String att2 and String att3) and is associated directly with table A.
I have mapped att1 using direct to field.
I have mapped att2 using direct to field and multitable.
But there is no direct relationship between A and C tables, which makes multitable configuration impossible (?).
So, how can I map C.att3 direct to DescA.att3 ??
[]'s
Henrique

Henrique,
If you are using the Toplink Workbench you will have to specify the relationship between Table B and C using an After Load method. The mapping workbench does not support this scenario yet, but it is allowed by TopLink. Use the api ClassDescriptor.addMultipleTableForeignKeyFieldName(String, String) to specify the relationship.
In the workbench you will see a problem message about the primary keys not matching and no reference being specified. You can safely ignore this warning, or if it bothers you, the only workaround I can think of is to also specify the mappings to Table C in the afterload method.
Karen

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Mapping the same column data to two different classes does entail a number of complications but regardless, you'll eventually have to perform a join between the EMP and ADDRESS table to obtain the street name associated with an Employee. If you model your Employee-Address relationship as a one-to-one rmapping with Employee having an attribute of type Address:
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--Shaun
[1] http://www.oracle.com/technology/products/ias/toplink/doc/10131/main/_html/oomapcfg002.htm#sthref3924

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bye
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<a href="/people/michal.krawczyk2/blog/2005/06/28/xipi-faq-frequently-asked-questions"><b>XI / PI FAQ - Frequently Asked Questions</b></a>

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One-to-one-to-one direct to field mapping

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