[eclipselink-users] Load mapping file at "runtime"

[Christian August Michelsen <chris-m@xxxxxxx>]

I'm having a wee bit trouble figuring out if and how I can specify a one 
or more mapping-files based on some business logic when I create my 
entitymanager (or before).

I basically have an entity where I have a string I'd like to map to 
different kinds of columns (read only) based on some information I have 
before I create my EMF and EM, but not at build/compile time.

So can one feed EclipseLink with the mapping files in any other way than 
through the persistence.xml-file?


Some background:
The reason I want to do this is that I have an ecommerce app that I'm 
connecting to. Now this web app has several different payment solutions 
whereas they pretty much all create a one or more new columns in the 
database. These of course have different names...

Now people usually only just use one of these payment solutions, so I 
thought I'd support this by having some generic strings in my entity 
class that maps to whatever column(s) the plugin adds. This way I don't 
have to maintain different entities of an order just to support 
different payment providers for instance.


--
Kind regards
Christian Michelsen