/**
* Create a new graph, with linestrings read from the database (optionally using only a buffer
* around a given track for the network)
*
* @param track GPS track consisting of a list of data points
* @param bufferSize size of the buffer to select around the track
* @param dumpFile if not empty, the path of a shapefile to dump the network into.
*/
public void addLineStringsFromDatabase(
ArrayList<Point> track, float bufferSize, String dumpFile) {
setLineMergeGraphH4cked(new LineMergeGraphH4cked());
distancesCalculated = false;
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
// Query gpsResults = session.createQuery("from" );
if (track == null) {
Query result = session.createQuery("from OSMEdge");
@SuppressWarnings("unchecked")
Iterator<OSMEdge> iter = result.iterate();
while (iter.hasNext()) {
OSMEdge o = iter.next();
LineString g = o.getGeometry();
addLineString(g, o.getId(), o.getEnvtype(), o.getCyktype(), o.getGroenm());
// let us add this thing to the spatial index
addOSMEdgeToSpatialIndex(o);
}
} else {
// let us join the nodes of the track to a linestring ....
Iterator<Point> trackIter = track.iterator();
Coordinate[] coords = new Coordinate[track.size()];
int i = 0;
while (trackIter.hasNext()) {
Point p = trackIter.next();
coords[i] = p.getCoordinate();
i++;
}
if (i > 1) {
LineString l = fact.createLineString(coords);
Criteria testCriteria = session.createCriteria(OSMEdge.class);
if (bufferSize > 0.) { // ... build a buffer ...
Geometry buffer = l.buffer(bufferSize);
// testCriteria.add(SpatialRestrictions.within("geometry", buffer));
testCriteria.add(SpatialRestrictions.intersects("geometry", buffer));
}
@SuppressWarnings("unchecked")
List<OSMEdge> result = testCriteria.list();
logger.info("Spatial query selected " + result.size() + " edges");
Iterator<OSMEdge> iter = result.iterator();
i = 0;
while (iter.hasNext()) {
i++;
OSMEdge o = iter.next();
LineString g = o.getGeometry();
addLineString(g, o.getId(), o.getEnvtype(), o.getCyktype(), o.getGroenm());
// let us add this thing to the spatial index
addOSMEdgeToSpatialIndex(o);
}
// if required, dump the graph to a shapefile:
if (dumpFile != "") {
try {
this.dumpBuffer(result, dumpFile);
logger.info("buffer dumped");
} catch (Exception e) {
logger.error("error dumping buffer: " + e);
}
}
} else {
logger.error("error: track has <2 coordinates");
}
}
session.disconnect();
}
