Hibernate 6.3 creates bytea column type instead of geometry

I basically encounter the same problem described in this post: hibernate-spatial-4.0 creates bytea column type instead of geometry

According to the hibernate docs the type mapping of a jts Geometry object should be done automatically without any additional annotations required. However, i end up with the bytea type in my postgis database: Database result

I use Spring boot 3.2, hibernate 6.3.1.Final and jts 1.19. My model is defined as:

import org.locationtech.jts.geom.Geometry;
// ...

@NoArgsConstructor
@AllArgsConstructor
@Data
@Entity
@Builder
public class DwdPoiStation {

    /** the internal database id. */
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    // ...

    @Column
    private Geometry geom;

    /** the height. */
    @Column
    private float height;
}

And i have set the hibernate dialect accordingly:

spring.jpa.database-platform: org.hibernate.dialect.PostgreSQLDialect
spring.jpa.hibernate.ddl-auto: update
spring.jpa.properties.hibernate.temp.use_jdbc_metadata_defaults: false
spring.jpa.properties.hibernate.default_schema: public

For the database i use a kartoza/postgis:16-3.4 docker image. The PostgreSQL jdbc driver version is 42.7.1.

What am i missing?

I tried one of the solution provided in the other post (https://stackoverflow.com/a/60469891/10209352), checked my dependencies and used the latest jts library. I also searched online for other solutions, but were unable to even find a related problem using the hibernate 6.x version. Since the official documentation states that additional annotations are not required, i expect that i do not have to use properties like "columnDefinition" or annotations like @Type to make this work. It rather seems to be a version missmatch problem.

Somehow the hibernate-spatial jar did not end up in my classpath. Now everything works like a charm. Thanks Karel for pointing that out!