using references in a template for QueryByCriteria

["Haldane, Sam" <ha...@acer.edu.au>]

Hi,

I have a question about using reference fields in a template object for
QueryByCriteria.

I have three persistent classes: Country, Language and Locale.  The
Locale class has a reference to a Country instance and a reference to a
Language instance, using anonymous fields as the foreign keys.  I want
to construct a Locale and create a template to use with QueryByCriteria
in order to get all locales that have a certain country or language.
For example:


Country country;
// get reference to Country object using PB

Locale template = new Locale();
template.setCountry(country);

QueryByCriteria query = new QueryByCriteria(template);
Collection results = broker.getCollectionByQuery(query);


This doesn't work, and the returned collection contains all locales, not
just those for the given country.  I realize that this is because the
anonymous country foreign key field in the template object is not set.
If I use the following code before creating the query, I get the results
that I want:


BrokerHelper helper = broker.serviceBrokerHelper();
helper.link(template, false);


I was wondering if there is a setting in the mapping descriptor, or
elsewhere in OJB that automates this link operation?

Regards,

Sam

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