LazyPropertyInitializer$1 cannot be cast to [B when calling Session.merge() on compile time enhanced composed entities

Description

Hello,

Following my observations from link I open this ticket as instructed on same topic.

Basically I have 2 Hibernate persistent entities Company, Manager ("has a" relationship).
Manager.resume is annotated with (@Basic(fetch = FetchType.LAZY)). Both entity classes are compile time instrumented by org.hibernate.orm.tooling:hibernate-enhance-maven-plugin.

At runtime during the transactional/Hibernate session scope:

  • create new instance Company/Manager

  • assemble them (they are still transient)

  • try to call session.merge(company). Following this I get the error below.
    The use case can be reproduced with the attached test case.

As I said in the post, by debugging and checking your github fixes for hibernate 4.x on same error:
Maybe a solution would be to modify the following method ? org.hibernate.type.TypeHelper.replace(Object[], Object[], Type[], SharedSessionContractImplementor, Object, Map, ForeignKeyDirection))

by adding a condition like you did when fixing the other

just as you did with the other one: org.hibernate.type.TypeHelper.replace(Object[], Object[], Type[], SharedSessionContractImplementor, Object, Map) in pull 891 https://github.com/hibernate/hibernate-orm/pull/891/files

I think this method is called for MyEntity properties (org.hibernate.type.TypeHelper.replace(Object[], Object[], Type[], SharedSessionContractImplementor, Object, Map, ForeignKeyDirection))) because I am persisting MyEntity indirectly through a parent entity MyContainerEntity (one-to-one relation, MyEntity being the owning side).

So the particularity of this case is that that a child entity fails to get merged through a parent entity. The child entity is compile time instrumented and has a LAZY Basic attribute/property.

Thanks in advance for looking

Environment

Java 1.8
<version.com.h2database>1.3.176</version.com.h2database>
<version.junit>4.11</version.junit>
<version.org.hibernate>5.2.1.Final</version.org.hibernate> / 5.2.2.Final
<version.org.slf4j>1.7.2</version.org.slf4j>
org.hibernate.orm.tooling:hibernate-enhance-maven-plugin:5.2.1.Final / 5.2.2.Final

Status

Assignee

Vlad Mihalcea

Reporter

Mike G

Fix versions

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backPortable

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Priority

Major
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