Hi Michael,
Craig
On Oct 25, 2005, at 5:55 AM, Michael Watzek wrote:
Hi Craig,
Hi Michael,
The relevant bit of the specification is regarding jdoPostLoad.
A10.1-2 [This method is not modified by the enhancer.]
So whatever is done in jdoPostLoad, the implementation will not
be called "transparently".
But the spec doesn't require jdoPostLoad to be called if only
fetch group A is active.
My understanding of the spec is that this is controled by attribute
post-load of element fetch-group. That's why I set it to true in my
example below.
There might be a typo related to fetch groups in chapter 12.7.2,
the last sentence of the first paragraph:
"The callback will be called if an instance is loaded when any
fetch group is active that contains the fetch-group set to true."
Shouldn't it say "... that contains the post-load set to true." ?
Yes, this is a typo in the spec. I've corrected it.
A better test might be to define the default fetch
group explicitly as not having the fields, and define fetch group
A as having the fields. Then you can have the default fetch group
(not fetch any fields) invoke jdoPostLoad, but test that fetch
group A fields have been loaded.
I agree that a default fetch group having no fields is better than
removing the default fetch group from the query fetch plan.
This is fine. I think the important thing is that both conditions are
true: the jdoPostLoad is called; and the field in fetch group A but
not in the default fetch group has a value from the database.
Craig
Regards,
Michael
Craig
On Oct 20, 2005, at 7:41 AM, Michael Watzek wrote:
Hi,
assertion A14.6-21 specifies:
"This method retrieves the fetch plan associated with the Query.
It always returns the identical instance for the same Query
instance. Any change made to the fetch plan affects subsequent
query execution."
I wonder, how the second part of this assertion can be tested.
Does the following idea make sense:
A class PC defines a fetch group A with post-load true. Class PC
defines a postLoad callback which sets a transient field for
each persistent field.
The test case creates a query instance having candidate class
PC. Afterwards, it retrieves the fetch plan, removes the default
fetch group and adds fetch group A. Then, it executes the query.
Finally, the test case checks for each returned query instance,
if the transient fields which correspond with persistent fields
of fetch group A have the right values.
Would this work, or would the persistent field access in
postLoad retrieve values from the database for non-loaded fields?
Regards,
Michael
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Michael Watzek [EMAIL PROTECTED] Engineering GmbH
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Michael Watzek [EMAIL PROTECTED] Engineering GmbH
mailto:[EMAIL PROTECTED] Buelowstr. 66
Tel.: ++49/30/235 520 36 10783 Berlin - Germany
Fax.: ++49/30/217 520 12 http://www.spree.de/
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