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How to get DB field name from an entity's property?

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damonf

Post subject: How to get DB field name from an entity's property?

Posted: Wed Nov 21, 2007 10:36 am

Regular

Joined: Wed Dec 21, 2005 6:57 pm
Posts: 70

We need to look up the DB table and column for an arbitrary property of a mapped data object so we can validate an external data source won't be truncated.

I've browsed through some metadata and session APIs but don't see how the property metadata is represented or accessed.

Does anyone have a pointer to a solution (or better yet some code) to tell what database column each property maps to?

We are using Hibernate 3.2, btw, and most of our mappings are in .hbm files by way of xdoclet (otherwise we'd go straight to the annotations).

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matbrown

Post subject:

Posted: Thu Nov 22, 2007 11:30 pm

Newbie

Joined: Fri Mar 30, 2007 5:23 pm
Posts: 16
Location: New York, NY

I've never tried this, but I'd check out the following methods:
Configuration.getClassMapping()
PersistentClass.getProperty()
Property.getColumnIterator()

Don't have an environment to test it, but I believe if you do something to this effect:

Code:

String columnName = myConfiguration.getClassMapping(theObj.getClass().getName()).getProperty('propertyName').getColumnIterator().next().getName()

Or something like that. Play around and you might find what you're looking for.[/url]

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