Comments on: Hibernate Spatial and Envers – Geospatial revisions

By: Damian

Damian — Sat, 19 Dec 2009 15:14:08 +0000

Works beautifully! Thank you so much Claudius

By: Claudius Hauptmann

Claudius Hauptmann — Fri, 18 Dec 2009 20:19:10 +0000

Hi Damian, thank you for your comments! You can’t use JPA directly since JPA does not support extensions like HibernateSpatial, thus you have to ask your Query for the HibernateQuery and then you can add parameters of GeometryUserType:

GeometryFactory geometryFactory = new GeometryFactory();
WKTReader reader = new WKTReader(geometryFactory);
Polygon polygon = (Polygon) reader.read(“POLYGON((” + north + ” ”
+ west + “, ” + north + ” ” + east + “, ” + south + ” ”
+ east + “, ” + south + ” ” + west + “, ” + north + ” ”
+ west + “))”);
polygon.setSRID(31466);

Query q = em
.createQuery(“SELECT gf FROM GeonameFeature AS gf WHERE ((gf.featureClass=’T’ AND (gf.featureCode=’MT’ OR gf.featureCode=’PK’)) ) AND true = ST_within(gf.location, :within)”);

org.hibernate.ejb.QueryImpl hs = (QueryImpl) q;

org.hibernate.Query hbQuery = hs.getHibernateQuery();

hbQuery.setParameter(“within”, polygon, org.hibernate.Hibernate
.custom(org.hibernatespatial.GeometryUserType.class));

q.setParameter(“within”, polygon);
q.setMaxResults(200);
List gfs = q.getResultList();

By: Damian

Damian — Fri, 18 Dec 2009 17:35:27 +0000

If anybody stumbles upon your blog with the same problem, I managed to solve the above by placing my @Type(type=”org.hibernatespatial.GeometryUserType”) annotation above my getLocation() method instead of over the location property in my Entity.

Still, I’d be interested to see how you coded spatial queries using JPA Claudius!

Great blog BTW.

By: Damian

Damian — Fri, 18 Dec 2009 15:45:58 +0000

Hi – could you provide the code for this example? Or at least the portion of code that shows query/storage via the EntityManager.

I am able to get this working (ignoring envers) using pure hibernate but I would like to get it working using JPA instead.

Currently, I am encountering a serialisation problem when using the simplest of queries on a table which has a Geometry column e.g.

Query query = em.createQuery(“select b from Branch b”);

results in

javax.persistence.PersistenceException: org.hibernate.type.SerializationException: could not deserialize
…
Caused by: java.io.StreamCorruptedException: invalid stream header: 30313031

Any help would be much appreciated.

Thanks in advance,
Damian