[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2525?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Max Rydahl Andersen resolved HHH-2525.
--------------------------------------

  Resolution: Duplicate

should be fixed now by fix to related bug - open new issue if still an issue.

> Bug when using a ResultTransformer on a cached query
> ----------------------------------------------------
>
>           Key: HHH-2525
>           URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2525
>         Project: Hibernate3
>       Issue Type: Bug
>       Components: core
>   Affects Versions: 3.2.2
>      Environment: Firebird 2.0 on Win XP
>        Reporter: Sebastien Cesbron
>      Attachments: testhib.zip
>
>
> Using a distinct result transformer which a cached like this :
> query = session.createQuery("select obj from ObjetTest obj left outer join fetch obj.children as obj_0 order by obj.id asc");
> query.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
> query.setCacheable(true);
> query.list();
> This leads to this exception
> 2007-03-21 14:28:20,589 ERROR : IllegalArgumentException in class: ObjetTest, getter method of property: oid
> Exception in thread "main" org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of ObjetTest.oid
>   at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:171)
>   at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier (AbstractEntityTuplizer.java:183)
>   at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier (AbstractEntityPersister.java:3524)
>   at org.hibernate.persister.entity.AbstractEntityPersister.isTransient (AbstractEntityPersister.java:3240)
>   at org.hibernate.engine.ForeignKeys.isTransient (ForeignKeys.java:181)
>   at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved (ForeignKeys.java:218)
>   at org.hibernate.type.ManyToOneType.disassemble (ManyToOneType.java:163)
>   at org.hibernate.cache.StandardQueryCache.put (StandardQueryCache.java:80)
>   at org.hibernate.loader.Loader.putResultInQueryCache (Loader.java:2118)
>   at org.hibernate.loader.Loader.listUsingQueryCache (Loader.java:2062)
>   at org.hibernate.loader.Loader.list (Loader.java:2020)
>   at org.hibernate.loader.hql.QueryLoader.list (QueryLoader.java:393)
>   at org.hibernate.hql.ast.QueryTranslatorImpl.list (QueryTranslatorImpl.java:338)
>   at org.hibernate.engine.query.HQLQueryPlan.performList (HQLQueryPlan.java:172)
>   at org.hibernate.impl.SessionImpl.list (SessionImpl.java:1121)
>   at org.hibernate.impl.QueryImpl.list (QueryImpl.java:79)
>   at Test.main(Test.java:33)
> Caused by: java.lang.IllegalArgumentException: object is not an instance of declaring class
>   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>   at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:39)
>   at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25)
>   at java.lang.reflect.Method.invoke (Method.java:597)
>   at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
>   ... 16 more
> It seems this is due to a difference in QueryLoader.getResultColumnOrRow. In this method there is a test :
> else if ( !hasTransform ) {
>   return row.length == 1 ? row[0] : row;
> }
> This causes the method to return an instance of ObjetTest in one case and an instance of ObjetTest[1] in the other one. In the latter test, when putting the query into the query cache, hibernate calls the getOid method on an array of ObjetTest and this causes the exception

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