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Full FetchGroup is NULL [message #1070658]

Thu, 18 July 2013 12:06

Hannes Kühtreiber

Messages: 21
Registered: June 2013

Junior Member

Hello Everybody,

more fetchGroup woes here:
creating a dynamic fetch group works nicely

		FetchGroup fetchLit = new FetchGroup(); 
		fetchLit.addAttribute("name");
		System.out.println("## fetchlit size="+fetchLit.getAttributeNames().size());
		query.setHint(QueryHints.FETCH_GROUP, fetchLit);

and delivers the expected result.

## fetchlit size=1
[EL Fine]: sql: Connection(3823508)--SELECT refIdReference, refReferenceName FROM tReferences WHERE ...

a full fetchGroup however is impossible to create:

		FetchGroupManager fgm = new FetchGroupManager();
		FetchGroup full =fgm.createFullFetchGroup();
		System.out.println("## full size="+full.getAttributeNames().size());
		query.setHint(QueryHints.FETCH_GROUP, full);

resulting in following error:

Exception in thread "main" java.lang.NullPointerException
	at org.eclipse.persistence.descriptors.FetchGroupManager.createFullFetchGroup(FetchGroupManager.java:326)
	at test_hannes.test_different_queries.test_criteria_relation(test_different_queries.java:130)
	at test_hannes.test_different_queries.main(test_different_queries.java:43)

what am I doing wrong?
Hannes

[Updated on: Thu, 25 July 2013 05:49]

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