[hibernate-issues] [JIRA] (HHH-13913) AttributeConverter with autoApply is not chosen for generic typed fields

Christian Koppen ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b34965... ) *created* an issue Hibernate ORM ( https://hibernate.atlassian.net/browse/HHH?atlOrigin=eyJpIjoiNWEzMTA1YjRh... ) / Bug ( https://hibernate.atlassian.net/browse/HHH-13913?atlOrigin=eyJpIjoiNWEzMT... ) HHH-13913 ( https://hibernate.atlassian.net/browse/HHH-13913?atlOrigin=eyJpIjoiNWEzMT... ) AttributeConverter with autoApply is not chosen for generic typed fields ( https://hibernate.atlassian.net/browse/HHH-13913?atlOrigin=eyJpIjoiNWEzMT... ) Issue Type: Bug Affects Versions: 5.4.11 Assignee: Unassigned Attachments: hibernate-issue-converter-autoapply-generics.zip Components: hibernate-core Created: 27/Mar/2020 10:04 AM Environment: hibernate-entitymanager:5.4.11.Final / Java 8 / Windows / H2 Labels: converter core regression Priority: Major Reporter: Christian Koppen ( https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5b34965... ) Problem: an AttributeConverter that is configured as @Converter(autoApply = true) is not used when the field is declared with a type variable (generics). Example: interface Foo {} @Converter(autoApply = true ) class FooConverter implements AttributeConverter<Foo, String > { ... } @MappedSuperclass abstract class AbstractContainer<T> { private T value; } @Entity class FooContainer extends AbstractContainer<Foo> { ... } I attached a demo that demonstrates the problem. The demo runs fine using 4.3.11, and fails using 5.4.11. The problem seems to be caused by AutoApplicableConverterDescriptorStandardImpl.getAutoAppliedConverterDescriptorForAttribute(). The attribute type is resolved using the declaring class only. This is not enough. In my example, the value is resolved as Object although the subclass FooContainer knows it's a Foo. Due to the missing type info, the converter is not chosen and the type conversion fails. Since the problem did not occur in 4.3.11, I suppose this behavior is not a missing feature but a bug. ( https://hibernate.atlassian.net/browse/HHH-13913#add-comment?atlOrigin=ey... ) Add Comment ( https://hibernate.atlassian.net/browse/HHH-13913#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#100122- sha1:38c716d )