public object NullSafeGet(IDataReader rs, string[] names, object owner)
{
var value = rs.GetValue(rs.GetOrdinal(names[0]));
if (value == DBNull.Value)
{
return(null);
}
return(Reader.Read((byte[])value));
}
/// <summary>
/// Reads a sequence of geometries.<br/>
/// If an <see cref="Offset"/> is specified, geometries read up to the offset count are skipped.
/// If a <see cref="Limit"/> is specified, no more than <see cref="Limit"/> geometries are read.
/// </summary>
/// <param name="streamReader">The stream reader to use.</param>
/// <exception cref="IOException">Thrown if an I/O exception was encountered</exception>
/// <exception cref="Gisoft.GeoAPI.IO.ParseException">Thrown if an error occured reading a geometry</exception>
private ICollection <IGeometry> Read(StreamReader streamReader)
{
var geoms = new List <IGeometry>();
var count = 0;
while (!IsAtEndOfFile(streamReader) && !IsAtLimit(geoms))
{
var line = streamReader.ReadLine();
if (string.IsNullOrEmpty(line))
{
continue;
}
var g = _wkbReader.Read(WKBReader.HexToBytes(line));
if (count >= Offset)
{
geoms.Add(g);
}
count++;
}
return(geoms);
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public GeometryValueConverter(IBinaryGeometryReader reader, IBinaryGeometryWriter writer)
: base(
g => new SqlBytes(writer.Write(g)),
b => (TGeometry)reader.Read(b.Value))
{
}
ValueTask <T> ReadCore <T>(NpgsqlReadBuffer buf, int len)
where T : IGeometry
=> new ValueTask <T>((T)_reader.Read(buf.GetStream(len, false)));