[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-5163) ClassCastException when Hibernate tries to cache results using ResultTransformer
Gail Badner (JIRA)
noreply at atlassian.com
Thu Oct 7 21:51:59 EDT 2010
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gail Badner resolved HHH-5163.
------------------------------
Resolution: Fixed
Fixed in hibernate-core git repo.
> ClassCastException when Hibernate tries to cache results using ResultTransformer
> --------------------------------------------------------------------------------
>
> Key: HHH-5163
> URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5163
> Project: Hibernate Core
> Issue Type: Bug
> Components: core
> Affects Versions: 3.5.1
> Reporter: Strong Liu
> Assignee: Gail Badner
> Fix For: 3.6.x
>
>
> When Hibernate executes a cacheable query using a ResultTransformer, it will attempt to cache the results AFTER applying the ResultTransformer. The problem is that the ResultTransformer may modify the data in a way that Hibernate won't understand it anymore, and in this case it will generate a ClassCastException when trying to cache it.
> ---------------------------
> this can be reproduced by CriteriaQueryTest with following change:
> papa-pc:testsuite stliu$ svn diff src/test/java/org/hibernate/test/criteria/CriteriaQueryTest.java
> Index: src/test/java/org/hibernate/test/criteria/CriteriaQueryTest.java
> ===================================================================
> --- src/test/java/org/hibernate/test/criteria/CriteriaQueryTest.java (revision 19246)
> +++ src/test/java/org/hibernate/test/criteria/CriteriaQueryTest.java (working copy)
> @@ -613,6 +613,7 @@
> )
> .addOrder( Order.desc("studentName") )
> .setResultTransformer( Transformers.aliasToBean(StudentDTO.class) )
> + .setCacheable( true )
> .list();
>
> assertEquals(2, resultWithAliasedBean.size());
--
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