/// <summary>
/// This create new method implies that this provider has the priority for creating a new file.
/// An instance of the dataset should be created and then returned. By this time, the fileName
/// will already be checked to see if it exists, and deleted if the user wants to overwrite it.
/// </summary>
/// <param name="fileName">The string fileName for the new instance.</param>
/// <param name="featureType">Point, Line, Polygon etc. Sometimes this will be specified, sometimes it will be "Unspecified".</param>
/// <param name="inRam">Boolean, true if the dataset should attempt to store data entirely in ram.</param>
/// <param name="container">The container for this layer. This can be null.</param>
/// <param name="progressHandler">An IProgressHandler for status messages.</param>
/// <returns>An IRaster.</returns>
public IFeatureLayer CreateNew(string fileName, FeatureType featureType, bool inRam, ICollection <ILayer> container, IProgressHandler progressHandler)
{
ShapefileDataProvider dp = new ShapefileDataProvider();
if (progressHandler == null)
{
progressHandler = LayerManager.DefaultLayerManager.ProgressHandler;
}
IFeatureSet fs = dp.CreateNew(fileName, featureType, inRam, progressHandler);
if (fs.FeatureType == FeatureType.Line)
{
return(new MapLineLayer(fs, container));
}
if (fs.FeatureType == FeatureType.Polygon)
{
return(new MapPolygonLayer(fs, container));
}
if (fs.FeatureType == FeatureType.Point || fs.FeatureType == FeatureType.MultiPoint)
{
return(new MapPointLayer(fs, container));
}
return(null);
}