[postgis-users] Hibernate Spatial Postgis 3D

[Drew Sheedy]

Hi Max,

What is your schema? Is hibernate creating it for you or are you creating it
for hibernate?

And if that is the WKTReader from VividSolutions, then you'll notice at:
http://www.vividsolutions.com/JTS/JTSHome.htm that the API only handles 2D.

HTH

Drew

On Thu, May 8, 2008 at 1:04 AM, Max <postgis at lists.meisel.cn> wrote:

> Hello,
>
> first i want to thank Karel for the great hibernate-spatial extension.
> Using this extension saves a lot of time.
>
> These days i got the new sources from the svn, because i saw that Karel
> was implementing the 3D stuff for the postgis-provider. So far so good.
>
> After compiling and using the new provider i found out, that it doesnt
> work for me, so maybe someone can help me to solve the problem. Writing
> a 3D point to the postgis-db still returns a 2D point, so i dont know
> whats wrong.
>
> My files are looking like this (parts - taken from hibernate spatial
> example)):
>
> ----------------------------
> ...hmb.xml
>
>        <property name="theGeom"
> type="org.hibernatespatial.GeometryUserType">
>            <column name="the_geom" />
>        </property>
>
> ----------------------------
> Class File
>
> import com.vividsolutions.jts.geom.Point;
> ...
>        public class Grd
>
>        private Point   theGeom;
>
>        public Point getTheGeom() {
>                return this.theGeom;
>        }
>
>        public void setTheGeom(Point theGeom) {
>                this.theGeom = theGeom;
>        }
> -------------------------------
>
> hibernateTest.java
>
>
>                hibernateTest hbTest = new hibernateTest();
>
>                hbTest.createAndStoreEvent("POINT(12 14 15)");
>
>                HibernateUtil.getSessionFactory().close();
>
>                .........
>
>        private void createAndStoreEvent(String wktPoint) {
>
>                // First interpret the WKT string to a point
>                WKTReader fromText = new WKTReader();
>                Geometry geom = null;
>                try {
>                        geom = fromText.read(wktPoint);
>                }
>                catch (ParseException e) {
>                        throw new RuntimeException("Not a WKT string:" +
> wktPoint);
>                }
>                if (!geom.getGeometryType().equals("Point")) {
>                        throw new RuntimeException("Geometry must be a
> point. Got a " + geom.getGeometryType());
>                }
>
>                Session session =
> HibernateUtil.getSessionFactory().getCurrentSession();
>
>                session.beginTransaction();
>
>                Grd theGrd = new Grd();
>                Point p = (Point) geom;
>
>        // at this point there is an Z-Coordinate ///
>                System.out.println(p.getCoordinate().z);
>
>                theGrd.setTheGeom(p);
>
>                session.save(theGrd);
>
>                session.getTransaction().commit();
>
>                HibernateUtil.getSessionFactory().close();
> --------------------------
>
> After reading the Point from the DB using:
>
>        private List<Grd> findAll() {
>                Session session =
>                HibernateUtil.getSessionFactory().getCurrentSession();
>                session.beginTransaction();
>                Criteria testCriteria =
> session.createCriteria(Dgm050Grd.class);
>                List<Dgm050Grd> results = testCriteria.list();
>                session.getTransaction().commit();
>                return results;
>
> // the Point has not Z-Coordinate, its just NaN
>
> So whats wrong? I know to appreciate your hekp
>
>
> best regards
>
> Steffen
>
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