/// <summary> /// Identifies those features that meet the specified spatial selection criteria. This operation is used to implement server-side selection. In addition to a selection set, this operation returns attribute information in case only one feature is selected. /// </summary> /// <param name="rtMap">The runtime map to identify features</param> /// <param name="maxFeatures">The maximum number of features to return</param> /// <param name="wkt">The WKT of the filter geometry</param> /// <param name="persist">If true will update the selection set for the given map</param> /// <param name="selectionVariant">The type of spatial operator to use for the spatial query</param> /// <param name="extraOptions">Extra querying options</param> /// <returns></returns> public abstract string QueryMapFeatures(RuntimeMap rtMap, int maxFeatures, string wkt, bool persist, string selectionVariant, QueryMapOptions extraOptions);
public override string QueryMapFeatures(RuntimeMap map, int maxFeatures, string wkt, bool persist, string selectionVariant, QueryMapOptions extraOptions)
{
string runtimeMapName = map.Name;
//The request may execeed the url limit of the server, when large geometries
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.Net.WebRequest req = m_reqBuilder.QueryMapFeatures(runtimeMapName, maxFeatures, wkt, persist, selectionVariant, extraOptions, ms);
req.Timeout = 200 * 1000;
ms.Position = 0;
using (System.IO.Stream rs = req.GetRequestStream())
{
Utility.CopyStream(ms, rs);
rs.Flush();
}
using (var sr = new StreamReader(req.GetResponse().GetResponseStream()))
return sr.ReadToEnd();
}
/// <summary>
/// Convenience method for performing selection based on the given geometry
/// </summary>
/// <param name="wkt"></param>
/// <param name="maxFeatures"></param>
/// <param name="persist"></param>
/// <param name="selectionVariant"></param>
/// <param name="extraOptions"></param>
/// <returns></returns>
public virtual string QueryMapFeatures(string wkt, int maxFeatures, bool persist, string selectionVariant, QueryMapOptions extraOptions)
{
if (_mapSvc == null)
throw new NotSupportedException();
var ret = _mapSvc.QueryMapFeatures(this, maxFeatures, wkt, persist, selectionVariant, extraOptions);
//Need to re-sync the selection as this will probably have been changed
ReloadSelection();
return ret;
}
public override string QueryMapFeatures(RuntimeMap rtMap, int maxFeatures, string wkt, bool persist, string selectionVariant, QueryMapOptions extraOptions)
{
string runtimeMapName = rtMap.Name;
MgRenderingService rs = this.Connection.CreateService(MgServiceType.RenderingService) as MgRenderingService;
MgResourceService res = this.Connection.CreateService(MgServiceType.ResourceService) as MgResourceService;
MgMap map = new MgMap();
string mapname = runtimeMapName.IndexOf(":") > 0 ? new ResourceIdentifier(runtimeMapName).Path : runtimeMapName;
map.Open(res, mapname);
MgWktReaderWriter r = new MgWktReaderWriter();
MgStringCollection layerNames = null;
string featureFilter = "";
int layerAttributeFilter = 0;
int op = MgFeatureSpatialOperations.Intersects;
if (selectionVariant == "TOUCHES")
op = MgFeatureSpatialOperations.Touches;
else if (selectionVariant == "INTERSECTS")
op = MgFeatureSpatialOperations.Intersects;
else if (selectionVariant == "WITHIN")
op = MgFeatureSpatialOperations.Within;
else if (selectionVariant == "ENVELOPEINTERSECTS")
op = MgFeatureSpatialOperations.EnvelopeIntersects;
else
throw new ArgumentException("Unknown or unsupported selection variant: " + selectionVariant);
if (extraOptions != null)
{
if (!string.IsNullOrEmpty(extraOptions.FeatureFilter))
featureFilter = extraOptions.FeatureFilter;
if (extraOptions.LayerNames != null && extraOptions.LayerNames.Length > 0)
{
layerNames = new MgStringCollection();
foreach (var name in extraOptions.LayerNames)
layerNames.Add(name);
}
layerAttributeFilter = (int)extraOptions.LayerAttributeFilter;
}
MgFeatureInformation info = rs.QueryFeatures(map, layerNames, r.Read(wkt), op, featureFilter, maxFeatures, layerAttributeFilter);
string xml = "";
GetByteReaderMethod fetch = () => { return info.ToXml(); };
using (var sr = new StreamReader(new MgReadOnlyStream(fetch)))
{
xml = sr.ReadToEnd();
}
//We only want the FeatureSet element
var doc = new System.Xml.XmlDocument();
doc.LoadXml(xml);
xml = doc.DocumentElement["FeatureSet"].OuterXml;
MgSelection sel = new MgSelection(map, xml);
sel.Save(res, mapname);
LogMethodCall("QueryMapFeatures", true, runtimeMapName, wkt, persist, selectionVariant, extraOptions == null ? "null" : "QueryMapOptions");
return xml;
}
public string QueryMapFeatures(RuntimeMap rtMap, int maxFeatures, string wkt, bool persist, string selectionVariant, QueryMapOptions extraOptions)
{
var impl = rtMap as LocalRuntimeMap;
if (impl == null)
throw new ArgumentException("Instance is not a LocalRuntimeMap", "map"); //LOCALIZEME
var rs = GetRenderingService();
var res = GetResourceService();
var map = impl.GetWrappedInstance();
MgWktReaderWriter r = new MgWktReaderWriter();
MgStringCollection layerNames = null;
string featureFilter = "";
int layerAttributeFilter = 0;
int op = MgFeatureSpatialOperations.Intersects;
if (selectionVariant == "TOUCHES")
op = MgFeatureSpatialOperations.Touches;
else if (selectionVariant == "INTERSECTS")
op = MgFeatureSpatialOperations.Intersects;
else if (selectionVariant == "WITHIN")
op = MgFeatureSpatialOperations.Within;
else if (selectionVariant == "ENVELOPEINTERSECTS")
op = MgFeatureSpatialOperations.EnvelopeIntersects;
else
throw new ArgumentException("Unknown or unsupported selection variant: " + selectionVariant);
if (extraOptions != null)
{
if (!string.IsNullOrEmpty(extraOptions.FeatureFilter))
featureFilter = extraOptions.FeatureFilter;
if (extraOptions.LayerNames != null && extraOptions.LayerNames.Length > 0)
{
layerNames = new MgStringCollection();
foreach (var name in extraOptions.LayerNames)
layerNames.Add(name);
}
layerAttributeFilter = (int)extraOptions.LayerAttributeFilter;
}
MgdFeatureInformation info = rs.QueryFeatures(map, layerNames, r.Read(wkt), op, featureFilter, maxFeatures, layerAttributeFilter);
string xml = "";
GetByteReaderMethod fetch = () => { return info.ToXml(); };
using (var sr = new StreamReader(new MgReadOnlyStream(fetch)))
{
xml = sr.ReadToEnd();
}
impl.Selection.LoadXml(xml);
return xml;
}
