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Static metamodel generation not working on JDK 21 when using xml mapping with Maven

Description

I have following entities:

public class Income implements Serializable { private int id; private BigDecimal balance; //rest of the code @Entity @Table(schema = "public", name = "t_expense") public class Expense implements Serializable { @Id private int id; private BigDecimal balance; //rest of the code

With orm.xml:

<?xml version="1.0" encoding="UTF-8"?> <entity-mappings xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="https://jakarta.ee/xml/ns/persistence/orm" xsi:schemaLocation="https://jakarta.ee/xml/ns/persistence/orm https://jakarta.ee/xml/ns/persistence/persistence_3_0https://jakarta.ee/xml/ns/persistence/orm/orm_3_1.xsd" version="3.1"> <entity class="org.hibernate.bugs.Income"> <table schema="public" name="t_income"/> <attributes> <id name="id"/> <basic name="balance"/> </attributes> </entity> </entity-mappings>

There are two problems in version 7.X with static model generation:

  1. If i configure modelgen dependency in annotationProcessorPath of maven-compiler-plugin then orm.xml is not loaded by generator probably due to classloading issues

  2. If i configure modelgen as regular dependency(less preferred way) then i will hit this error:

jakarta.xml.bind.JAXBException: Implementation of Jakarta XML Binding-API has not been found on module path or classpath. - with linked exception: [java.lang.ClassNotFoundException: org.glassfish.jaxb.runtime.v2.ContextFactory]

If I add jaxb impl. dependency(as plugin dependency, adding as regular dependency doesn’t work):

<dependency> <groupId>org.glassfish.jaxb</groupId> <artifactId>jaxb-runtime</artifactId> <version>4.0.5</version> </dependency>

Then i get:

jakarta.xml.bind.JAXBException: Error while searching for service [jakarta.xml.bind.JAXBContextFactory] - with linked exception: [java.util.ServiceConfigurationError: jakarta.xml.bind.JAXBContextFactory: org.glassfish.jaxb.runtime.v2.JAXBContextFactory not a subtype]

I think in this case jaxb api and impl are picked from different classloaders(adding api dep. to plugin dosen’t fix that).

These problems also occurs when i configure modelgen with maven-processor-plugin instead of maven-compiler-plugin

Test case is in attachement (it’s testcase2.zip)

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  • 18 Dec 2024, 08:05 AM
  • 11 Oct 2024, 01:08 PM

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Created October 11, 2024 at 1:08 PM
Updated March 24, 2025 at 6:52 AM

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