/**
* Gets the layer extent that this compiler will use. If this is set
* to GeoExtent.Infinite, that compiler will query the feature layer
* for its full extent and use that as the AOI.
*/
public GeoExtent getAreaOfInterest(FeatureLayer layer)
{
if (aoi_xmin < aoi_xmax && aoi_ymin < aoi_ymax)
{
return(new GeoExtent(aoi_xmin, aoi_ymin, aoi_xmax, aoi_ymax, layer.getSRS()));
}
else
{
return(layer.getExtent());
}
}
public Node compile(FeatureLayer layer, FeatureCursor cursor, FilterGraph graph)
{
osg.ref_ptr <FilterEnv> env = getSession().createFilterEnv();
env.setExtent(getAreaOfInterest(layer));
env.setInputSRS(layer.getSRS());
env.setTerrainNode(terrain.get());
env.setTerrainSRS(terrain_srs.get());
env.setTerrainReadCallback(read_cb.get());
osg.Group * output;
FilterGraphResult r = graph.computeNodes(cursor, env.get(), output);
return(r.isOK() ? output : NULL);
}
/**
* Creates a feature layer by connecting to a feature store.
*
* @param uri
* URI of the feature store to use as the underlying data
* source for this layer.
* @return
* A new feature layer. Caller is responsible for deleting
* the return object.
*/
public FeatureLayer createFeatureLayer(string uri)
{
FeatureLayer result = null;
if (getFeatureStoreFactory() != null)
{
FeatureStore store = getFeatureStoreFactory().connectToFeatureStore(uri);
if (store != null && store.isReady())
{
result = new FeatureLayer(store);
#if TODO
// if the store doesn't provide a spatial reference, try to load one from
// a PRJ file:
if (result != null && result.getSRS() == null)
{
if (osgDB.fileExists(uri)) // make sure it's a file:
{
string prj_file = osgDB.getNameLessExtension(uri) + ".prj";
fstream istream;
istream.open(prj_file.c_str());
if (istream.is_open())
{
istream.seekg(0, std.ios.end);
int length = istream.tellg();
istream.seekg(0, std.ios.beg);
char[] buf = new char[length];
istream.read(buf, length);
istream.close();
string prj = buf;
SpatialReference prj_srs =
Registry.instance().getSRSFactory().createSRSfromWKT(prj);
result.setSRS(prj_srs);
}
}
}
#endif
}
}
return(result);
}
/**
* Creates a feature layer by connecting to a feature store.
*
* @param uri
* URI of the feature store to use as the underlying data
* source for this layer.
* @return
* A new feature layer. Caller is responsible for deleting
* the return object.
*/
public FeatureLayer createFeatureLayer(string uri)
{
FeatureLayer result = null;
if (getFeatureStoreFactory() != null)
{
FeatureStore store = getFeatureStoreFactory().connectToFeatureStore(uri);
if (store != null && store.isReady())
{
result = new FeatureLayer(store);
#if TODO
// if the store doesn't provide a spatial reference, try to load one from
// a PRJ file:
if (result != null && result.getSRS() == null)
{
if (osgDB.fileExists(uri)) // make sure it's a file:
{
string prj_file = osgDB.getNameLessExtension(uri) + ".prj";
fstream istream;
istream.open(prj_file.c_str());
if (istream.is_open())
{
istream.seekg(0, std.ios.end);
int length = istream.tellg();
istream.seekg(0, std.ios.beg);
char[] buf = new char[length];
istream.read(buf, length);
istream.close();
string prj = buf;
SpatialReference prj_srs =
Registry.instance().getSRSFactory().createSRSfromWKT(prj);
result.setSRS(prj_srs);
}
}
}
#endif
}
}
return result;
}