public RedlineLayer CreateRedlineLayer(CreateRedlineLayerParams param, out bool bAddedToMap)
{
bAddedToMap = false;
MgResourceIdentifier fsId = GenerateRedlineFeatureSourceId(param);
string className = null;
string providerName = null;
if (_resSvc.ResourceExists(fsId))
{
MgFeatureSchemaCollection schemas = _featSvc.DescribeSchema(fsId, string.Empty, null);
MgFeatureSchema schema = schemas.GetItem(0);
MgClassDefinitionCollection classes = schema.GetClasses();
MgClassDefinition cls = classes.GetItem(0);
className = schema.Name + ":" + cls.Name;
}
else
{
MgFeatureSchema schema = RedlineSchemaFactory.CreateSchema(param.GeometryTypes);
providerName = "OSGeo.SDF";
if (param.Format == RedlineDataStoreFormat.SHP)
{
providerName = "OSGeo.SHP";
}
else if (param.Format == RedlineDataStoreFormat.SQLite)
{
providerName = "OSGeo.SQLite";
}
MgFileFeatureSourceParams createParams = new MgFileFeatureSourceParams(providerName, RedlineSchemaFactory.SPATIAL_CONTEXT, _map.GetMapSRS(), schema);
_featSvc.CreateFeatureSource(fsId, createParams);
//HACK: SQLite leaky abstraction (hard-coded schema name), SHP probably has some leaks of its own, so we can't assume MarkupSchema:Markup
//as the class name so re-interrogate our schema to figure it out
MgFeatureSchemaCollection schemas = _featSvc.DescribeSchema(fsId, string.Empty, null);
schema = schemas.GetItem(0);
MgClassDefinitionCollection classes = schema.GetClasses();
MgClassDefinition cls = classes.GetItem(0);
className = schema.Name + ":" + cls.Name;
}
MgResourceIdentifier ldfId = GenerateRedlineLayerDefinitionId(param);
if (!_resSvc.ResourceExists(ldfId))
{
string layerDefContent = CreateRedlineLayerDefinitionContent(fsId, className, param.Style, param.StyleType);
byte[] bytes = Encoding.UTF8.GetBytes(layerDefContent);
MgByteSource byteSource = new MgByteSource(bytes, bytes.Length);
MgByteReader byteReader = byteSource.GetReader();
_resSvc.SetResource(ldfId, byteReader, null);
}
if (param.AddToMap)
{
AddRedlineLayerToMap(ldfId);
bAddedToMap = true;
}
var layer = new RedlineLayer(ldfId.Name, fsId.ToString(), ldfId.ToString(), param.GeometryTypes, param.StyleType);
//If provider name was set, then we register this layer in the registry. Otherwise it means
//the layer already exists and by extension already registered
if (providerName != null)
{
_registry.AddRedlineLayer(layer, providerName);
}
return(layer);
}
private MgResourceIdentifier GenerateRedlineFeatureSourceId(CreateRedlineLayerParams param)
{
return(new MgResourceIdentifier(ResourceIdPrefix + param.Name + "." + MgResourceType.FeatureSource));
}
private MgResourceIdentifier GenerateRedlineLayerDefinitionId(CreateRedlineLayerParams param)
{
return(new MgResourceIdentifier(ResourceIdPrefix + param.Name + "." + MgResourceType.LayerDefinition));
}