[ http://jira.andromda.org/browse/SPRING-84?page=comments#action_12971 ]
David Allen commented on SPRING-84: ----------------------------------- This is the same problem I just fixed and tested recently to allow a report query to return aggregate function results. The problem is as described in this bug report, and the fix is very simple to allow these queries in addition to the single entity queries as before (just a vsl conditional around the call to the transform() operation). The patch will follow. > Handling of Hibernate Report Queries leads to ClassCastExceptions > ----------------------------------------------------------------- > > Key: SPRING-84 > URL: http://jira.andromda.org/browse/SPRING-84 > Project: Spring Cartridge > Type: Bug > Versions: 3.1M1 > Environment: AndroMDA setup including Spring and Hibernate cartridge, > modelling done by Together and own XMI-exporter, Windows XP, generation via > ANT-task > Reporter: Dirk Rademann > Assignee: Chad Brandon > > By using Hibernate report queries like > select entity.property1, entity.property2 > from SomeEntityImpl entity > where entity.id = ? > the Spring Cartridge generates code (...DaoBase) that tries to cast the > result of the query into the given entity class, in the example given above > that would be like > ... > java.util.List results = queryObject.list(); > result = (SomeEntityImpl)results.iterator().next(); > resulting in a ClassCastException cause the query returns an Object[] with > two values (property1 and property2), not an entity. The entity itself is > connected to a tagged <<ValueObject>> and the transform methods are also > generated and implemented: > to<name of value object>(SomeEntityImpl entity) and(!) > to<name of value object>(Object[] entity) > That means that the transform methods are generated correctly already and if > I use a finder with the specific constant for a value object transformation > the code should call the > to<name of value object>(Object[] entity) > method prior to doing anything else like it is already doing for Collections > of entites which are transformed into value objects. Currently you can't use > Hibernate report queries that return one single row. Only workaround at the > moment is to use a Collection as return value. > regards, > Dirk Rademann -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.andromda.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
