I am executing a query as follows. It results in a compiler error because the POJO class is not found.



The compiler in eclipse finds an HQL Syntax Error: unable to locate class [org.domain.b1.ui.NonMappedClass]. The class exists and may be instantiated normally outside of a query. It's a POJO class that's not in the same package as the Hibernate entities that were created from the database tables. From within the HQL Editor, this query works fine. It just won't compile in my code! I think I need to somehow notify Hibernate of this POJO class so that it is visible during compile. Any ideas how to do that? Is it a certain @ Annotation I need, or do I need to create a hibernate config xml file? Or maybe there is a completely different solution. Regardless, thank you for helping.

I don't know whether you should expect Hibernate to be able to manage entities that it isn't responsible for persisting.

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Stephen Souness

SELECT NEW does exactly that. When using SELECT NEW you dont need to specify a mapped entity type. You can specify any POJO class, its only that you should have a matching constructor in ur POJO class.
See the part "Cases where joined queries aren't enough" of
http://www.javalobby.org/articles/hibernate-query-101/
and
http://www.theserverside.com/discussion ... d_id=28872

Well coming to the issue in the post, the query should be working even if the POJO class is outside of hibernate entity class. Can you post the relevant code, mapping and the stack trace you are getting.

You need to use the import keyword. Just create a simple hbm file like so:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="myassembly" namespace="mynamespace">
<import class="MyClassThatsJustAPOJO" />
</hibernate-mapping>