[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2235) Support for null map-keys in <map> mappings

Support for null map-keys in <map> mappings ------------------------------------------- Key: HHH-2235 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2235 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.2.0.ga Reporter: Igor Lobanov Priority: Minor I'm not sure if I should file it as a bug. Hibernate requires index column for <map> mappings to be not null. This is required by the code in AbstractCollectionPersister#readIndex(...), which raises exception if index column is null. However, when I override collection persister and force readIndex method to return null, everything seems to work fine. Hibernate allows me to work with maps using null value as a key. Though I havn't tested it extensivly yet. What is the reason for disallowing null values as a keys? If there are possible complicated error conditions, then this issue is a feature request for null-values support for <map> mappings. If there are no errors possible, then constraining such behavior is probably wrong.