/// <summary>
/// Perform MEF initialization
/// </summary>
private void ComposeMefParts()
{
var catalog = Utils.Mef.GetMefCatalogs();
try
{
catalog.Catalogs.Add(new AssemblyCatalog("RVRMeander.Model.Mc.dll"));
}
catch (Exception ex)
{
log.Fatal("Unable to find one of the assemblies that MainFormCore adds to the assembly catalog: {0}", ex.Message);
}
//catalog.Catalogs.Add(new DirectoryCatalog(System.IO.Path.GetDirectoryName(System.AppDomain.CurrentDomain.BaseDirectory), "*.dll"));
//catalog.Catalogs.Add(new DirectoryCatalog(System.IO.Path.GetDirectoryName(System.AppDomain.CurrentDomain.BaseDirectory), "*.exe"));
this.compContainer = new CompositionContainer(catalog);
try
{
this.compContainer.ComposeParts(this);
}
catch (System.Reflection.ReflectionTypeLoadException ex)
{
foreach (Exception inner in ex.LoaderExceptions)
{
log.Warning("Reflection error: {0}", inner.Message);
}
}
catch (CompositionException ex)
{
log.Fatal(ex.ToString());
//Close();
}
this.container = this;
}
/// <summary>
/// Reads the feature set from the database, satisfying the given SQL query
/// </summary>
/// <param name="connString">sqlite db connection string</param>
/// <param name="featureSetInfo">information about the table</param>
/// <param name="sqlFilter">the sql query; to select all: "SELECT * FROM TableName"</param>
/// <returns>the resulting feature set</returns>
public bool TryReadFeatureSet(SQLiteConnection conn, FeatureSetTableInfo featureSetInfo, string sqlFilter, out IFeatureSet featureSet)
{
featureSet = null;
if (featureSetInfo == null)
{
return(false);
}
var fs = new SpatiaLiteFeatureSet(featureSetInfo.GeometryType);
fs.IndexMode = false; //setting the initial index mode..
SQLiteCommand cmd = null;
try
{
cmd = new SQLiteCommand(sqlFilter, conn);
var wkbr = new SpatiaLiteWkbReader();
var rdr = cmd.ExecuteReader();
var columnNames = PopulateTableSchema(fs, featureSetInfo.GeometryColumnName, rdr);
while (rdr.Read())
{
var wkb = rdr[featureSetInfo.GeometryColumnName] as byte[];
var geom = wkbr.Read(wkb);
var newFeature = fs.AddFeature(geom);
//populate the attributes
foreach (var colName in columnNames)
{
newFeature.DataRow[colName] = rdr[colName];
}
}
fs.Name = featureSetInfo.TableName;
//TODO: look into this...
//HACK required for selection to work properly
fs.IndexMode = true;
// assign projection
ProjectionInfo proj;
if (featureSetInfo.SRID >= 0)
{
try
{
proj = ProjectionInfo.FromEpsgCode(featureSetInfo.SRID);
}
catch (Exception ex)
{
log.Warning("Unable to find projection info from EPSG code {0}, using default: {1}", featureSetInfo.SRID, ex.Message);
proj = new ProjectionInfo();
}
}
else
{
proj = new ProjectionInfo();
}
fs.Projection = proj;
featureSet = fs;
return(true);
}
catch (Exception ex)
{
log.Error("Unable to read feature set {0} using SQL \"{1}\": {2}", featureSetInfo.TableName, sqlFilter, ex.Message);
return(false);
}
finally
{
if (cmd != null)
{
cmd.Dispose();
}
}
}