Instance should not be created to determine unsaved-value for primitive @Id type -------------------------------------------------------------------------------- Key: HHH-1495 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1495 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.1.2 Reporter: Barry Kaplan I am having problems with @Id and its unsaved-value. I would like the unsaved-value to default to something without an instance being created. But the code in UnsavedValueFactory.getUnsavedIdentifierValue seems to choose to try to instantiate an instance before it checks whether the @Id is of a primitive type: if ( unsavedValue == null ) { if ( identifierGetter!=null && constructor!=null ) { // use the id value of a newly instantiated instance as the unsaved-value Serializable defaultValue = (Serializable) identifierGetter.get( instantiate(constructor) ); return new IdentifierValue( defaultValue ); } else if ( identifierGetter != null && (identifierType instanceof PrimitiveType) ) { Serializable defaultValue = ( ( PrimitiveType ) identifierType ).getDefaultValue(); return new IdentifierValue( defaultValue ); } ... I don't really need the default constructor. If I get rid of it, I get past determining the unsaved-value, but then fail later on in PojoInstantiator.instantiate. (See also http://forum.hibernate.org/viewtopic.php?t=955569)