Add support for GraalVM native images

[gtskaushik]

Hi Team
Thanks for your work on HibernateTypes. When we are trying to build a native image for Spring Boot, the build succeeds but while running, it fails with the following error:
`
Native reflection configuration for org.hibernate.annotations.common.reflection.java.JavaXAnnotatedElement.getJavaType() is missing.

Action:

Native configuration for a method accessed reflectively is likely missing
`

Following are the type hints added
@NativeHint(types = { @TypeHint(types = { org.springframework.jdbc.datasource.SimpleDriverDataSource.class, com.vladmihalcea.hibernate.type.basic.PostgreSQLEnumType.class, com.vladmihalcea.hibernate.type.json.JsonBinaryType.class })

Spring Boot version - 2.5.4
Spring Native version - 0.10.3-SNAPSHOT

[vladmihalcea]

At the moment, the library does not support GraalVM. The #202 issue was created some time ago, but no one added support for it.

If you want to investigate what's needed in order to make it work on GraalVM, I'd love to integrate your contribution.

[edudar]

I've spent some time tracking this down as I faced the same issue with JSON types. So far, I think the culprit is this

Type type = (xProperty instanceof JavaXMember) ?
  ReflectionUtils.invokeGetter(xProperty, "javaType") :
  ((ParameterType) parameters.get(PARAMETER_TYPE)).getReturnedClass();

reflection call to get javaType. I don't know hibernate-types good enough, and not sure why it needs to be a reflection call here, but doing ((JavaXMember) xProperty).getJavaType(), after all, we just checked type that it's JavaXMember, allowed me to move past Hibernate issues.

@vladmihalcea, I can make a PR if this sounds like a proper fix.

[vladmihalcea]

Sure thing. Please send the PR.

[vladmihalcea]

Fixed.