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Teneo/EclipseLink/EMF find Object [message #634767]

Sat, 23 October 2010 10:08

Dennis Melzer

Messages: 244
Registered: July 2009

Senior Member

Hello,

How can I find a Object via EClass?
For Example EMF generates a interface Person and PersonImpl class. I generate with Teneo the orml.xml.
Now i want to find da Object with the entityManager.
But it doesn't work because the JPA layer doesn't know the interfaces.

java.lang.IllegalArgumentException: Unknown entity bean class: interface Person

	public DBObject find(EClass entityClass, Object primaryKey) {
		return (DBObject ) entityManager.find(entityClass.getInstanceClass(), primaryKey);
	}

How i can get the right class?

[Updated on: Sat, 23 October 2010 10:09]

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Re: Teneo/EclipseLink/EMF find Object [message #634775 is a reply to message #634767]

Sat, 23 October 2010 12:23

Martin Taal

Messages: 5468
Registered: July 2009

Senior Member

Hi,
Not the nicest approach but my first idea to get the implementation class for an eclass is this:
eClass.getEPackage().getEFactory().create(eClass).getClass()

You can iterate over all eclasses of an epackage and build a cache of eclass-->class mappings.

gr. Martin

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