[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-6143) ElementCollection in Embeddable in Entity is ignored on merge

ElementCollection in Embeddable in Entity is ignored on merge ------------------------------------------------------------- Key: HHH-6143 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6143 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.6.3 Environment: Hibernate EntityManager 3.6.3, HSQLDB 2.0.0 Reporter: Andy Schlaikjer Assignee: Gail Badner Attachments: merge-embedded-elementcollection.zip *Overview* When an {{@ElementCollection}} field {{ec}} is defined within an {{@Embeddable}} type {{C}}, and an {{@Embedded}} field {{em}} of type {{C}} is defined within an {{@Entity}} type {{E}}, if we create an {{E}} instance {{e}} and initialize {{e.em.ec}}, the value of {{e.em.ec}} is ignored on merge of {{e}}. Furthermore, the value is ignored even when {{ec}} has been annotated with {{@ElementCollection(fetch = FetchType.EAGER)}} and Hibernate's {{@Cascade(ALL)}}, and {{em}} has been annotated with {{@Cascade(ALL)}}. Disclaimer: This use case may not be required by the JPA 2.0 spec (though it'd be nice to see support): {quote} Implementations are not required to support embedded objects that are mapped across more than one table (e.g., split across primary and secondary tables or multiple secondary tables). {quote} Note: This issue may be related to HHH-5187, HHH-4135. *Steps to reproduce* # Define {{@Embeddable}} type {{ContactInfo}} with {{@ElementCollection}} field {{emailAddresses}} of type {{List<String>}}. # Define {{@Entity}} type {{Person}} with {{@Embedded}} field {{contactInfo}} of type {{ContactInfo}}. # Create a new {{Person}} instance {{p1}} and initialize {{p1.contactInfo.emailAddresses}}. # Use {{EntityManager}} to merge {{p1}}. # Use {{EntityManager}} to find {{Person}} with id matching that of {{p1}}; Init {{p2}} with result. # Compare {{p1}} and {{p2}}. . *Expected* {{Person}} instances {{p1}} and {{p2}} are identical. Specifically, {{p2.contactInfo.emailAddresses}} should not be null, and its contents should match that of {{p1.contactInfo.emailAddresses}}. *Observed* {{Person}} instances {{p1}} and {{p2}} are not equal: {{p2.contactInfo.emailAddresses}} is null. On merge of {{p1}} Hibernate is ignoring non-null {{p1.contactInfo.emailAddresses}} property value. From the source code, it looks like the {{p1.contactInfo.emailAddresses}} property value is not being copied into the EntityManager's managed instance of {{p1}} on merge. *Test case* Please see the attached Maven project for full unit test.