how to write hibernate spatial query? - spring

Question

This is homePage.jsp code :
<button id="bilgial" onclick="getVector(id)">Get Vector</button>
<input type="text" id="hs">
and this is getVector(id) function :
var id = document.getElementById("hs").value;
function getVector(id) {
ajax({
type: "GET",
path: "/getGeoJson",
data: {id: id},
contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
success: function (data) {
var parser = new OpenLayers.Format.GeoJSON();
var feature = parser.read(data.data);
if (feature.length != 0) {
feature[0].attributes.id = data.id;
}
vectors.addFeatures(feature);
}
});
}
this is my controller get method :
#Controller
public class HSpatialController {
SavegeojsonManager add = new SavegeojsonManager();
#RequestMapping(value = "/getGeoJson", method = RequestMethod.GET)
#ResponseBody
public GeoJSON getGeoJson( final HttpServletRequest request,#RequestParam("id") final String vectorId) {
return add.get(vectorId);
}
}
and this is SavegeojsonManager class and get method :
public GeoJSON get(String id) {
GeoJSON geoJson = new GeoJSON();
EntityManager em = HibernateSpatialJPA.createEntityManager();
em.getTransaction().begin();
Query query = em.createQuery("select e from SavegeojsonEntity ????")
query.setParameter("", ??);
return geoJson;
}
or how can I do otherwise ?
I want to was eat with the number that was in the database that you want to take the data from the TextBox equally with data GetData ?

Answer 1

So code should be like this:
public GeoJSON get(String id) {
GeoJSON geoJson = new GeoJSON();
EntityManager em = HibernateSpatialJPA.createEntityManager();
em.getTransaction().begin();
Query query = em.createQuery("from SavegeojsonEntity s where s.id = :id")
query.setParameter("id", Integer.valueOf(id));
List entityList = query.getResultList();
if(entityList != null && !entityList.isEmpty()){
SavegeojsonEntity entity = (SavegeojsonEntity)entityList.get(0);
geoJson.setType(entity.getVectorType());
if(entity.getVectorType().equals("Point")){
geoJson.setData(entity.getPoint());//or entity.getXXX() since you need to get point data,
} else if(...){
//same for Polygon/MultiPolygon/StringLine and so on
}
}
em.getTransaction().close();
return geoJson;
}