[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3148) Exception thrown by debug trace code: ComponentType toLoggableString

Exception thrown by debug trace code: ComponentType toLoggableString -------------------------------------------------------------------- Key: HHH-3148 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3148 Project: Hibernate3 Issue Type: Bug Affects Versions: 3.2.6 Environment: Hibernate 3.2.6.ga HibernateAnnotations 3.3.0.ga Oracle 10g Express Edition Reporter: Pete Geraghty Priority: Minor Attachments: NullableType.java, ToLoggableStringExample.txt The method toLoggableString in ComponentType is used to provide tracing output when running with log level DEBUG. In some circumstances it throws a ClassCastException. This is not a good idea in tracing code and obscures underlying problems. In my case the underlying problem was a previous incorrect call to set a parameter value in a query. I saw that previous JIRA issues have mentioned this ClassCastException as a side effect of other underlying problems - it is a distraction and time-waster. Lines 375-378 read: EntityMode entityMode = tuplizerMapping.guessEntityMode( value ); if ( entityMode == null ) { throw new ClassCastException( value.getClass().getName() ); } A better solution would be to just us String.valueOf EntityMode entityMode = tuplizerMapping.guessEntityMode( value ); if ( entityMode == null ) { return String.valueOf(value); } Another possibility would be to concatenate some diagnostic message with String.valueOf, but personally I don't think that be helpful. Stack trace is: Exception in thread "main" java.lang.ClassCastException: java.lang.String at org.hibernate.type.ComponentType.toLoggableString(ComponentType.java:377) at org.hibernate.pretty.Printer.toString(Printer.java:76) at org.hibernate.engine.QueryParameters.traceParameters(QueryParameters.java:277) at org.hibernate.engine.query.HQLQueryPlan.performIterate(HQLQueryPlan.java:210) at org.hibernate.impl.SessionImpl.iterate(SessionImpl.java:1192) at org.hibernate.impl.QueryImpl.iterate(QueryImpl.java:46) at hib.example.EntityWithEmbeddable.main(EntityWithEmbeddable.java:44) Example code for the classes and schema to reproduce is pasted into the attachment.