Steve Ebersole ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) *updated* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiYTc2NGIzZGRj... ) / Sub-task ( https://hibernate.atlassian.net/browse/HHH-16148?atlOrigin=eyJpIjoiYTc2NG... ) HHH-16148 ( https://hibernate.atlassian.net/browse/HHH-16148?atlOrigin=eyJpIjoiYTc2NG... ) Introduce Immutability (MutabilityPlan) for use with @Mutability ( https://hibernate.atlassian.net/browse/HHH-16148?atlOrigin=eyJpIjoiYTc2NG... ) Change By: Steve Ebersole ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=557058%... ) Because of the type parameterization on {{Mutability}} and {{ImmutableMutabilityPlan}}: {noformat}public @interface Mutability { Class<? extends MutabilityPlan<?>> value(); } public class ImmutableMutabilityPlan<T> implements MutabilityPlan<T> { ... }{noformat} The following will give compile errors (Java generics ftw!): {noformat}(a)Mutability(ImmutableMutabilityPlan.class){noformat} Create a non-type-parameterized version: {noformat}public class Immutability implements MutabilityPlan<Object> { }{noformat} And then this works: {noformat}(a)Mutability(Immutability.class){noformat} ( https://hibernate.atlassian.net/browse/HHH-16148#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-16148#add-comment?atlOrigin=ey... ) Get Jira notifications on your phone! Download the Jira Cloud app for Android ( https://play.google.com/store/apps/details?id=com.atlassian.android.jira.... ) or iOS ( https://itunes.apple.com/app/apple-store/id1006972087?pt=696495&ct=Em... ) This message was sent by Atlassian Jira (v1001.0.0-SNAPSHOT#100214- sha1:4a69e91 )