In my library project I have some JPA @Entity classes and a couple of JPA utils.

The project has essentially JAP/hibernate-related dependencies only, and no Spring-mumbo-jumbo.

Now I want to unit-test my domain classes as well as the utilities.

My test classes are like so:

class DSLCriteriaTest {

  @BeforeAll
  static void init() {
    new DSLCriteria( Persistence.createEntityManagerFactory("tst").createEntityManager() );
  }
  
  @Test
  void testDotNotationVSNested() {
    var list = DSLCriteria.list( A.class, q -> q
      .eq( "name", "a" )
      .on( "b", () -> q
        .on( "c.d", () -> q
          .in( "lastName", "John" )
          .orderBy( "id", "desc" )
        )
      ) 
    );
    
    assertFalse( list.isEmpty() );
  }
}

and src/test/resources/META-INF/persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
    xmlns="http://xmlns.jcp.org/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence  http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd ">
    
<persistence-unit name="tst" transaction-type="RESOURCE_LOCAL">
    <!-- 
    <class>my.domain.A</class>
    <class>my.domain.B</class>
    ... 30 other classes ...
    -->
    
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
        
    <properties>
      <property name="hibernate.archive.autodetection" value="class, hbm"/>
      ...
    </properties>

</persistence-unit>

</persistence>    

This configuration works only if I un-comment the <class>-elements. The “auto-detection” fails miserably with an Exception:

java.lang.IllegalArgumentException: Not an entity: my.domain.A
at org.hibernate.metamodel.model.domain.internal.JpaMetamodelImpl.entity(JpaMetamodelImpl.java:205)
at org.hibernate.query.sqm.tree.select.AbstractSqmSelectQuery.from(AbstractSqmSelectQuery.java:243)
at org.hibernate.query.sqm.tree.select.AbstractSqmSelectQuery.from(AbstractSqmSelectQuery.java:44)

How to auto-scan all JPA entities of the same project in 2024 without using irrelevant tools?