private void WriteHeaderIfRequired()
{
if (this.isHeaderWritten)
{
return;
}
ProtoWriter.WriteFieldHeader(1, WireType.StartGroup, this.writer);
this.context.StartSubItem(this.resultIndex);
this.context.Columns = ProtoDataColumnFactory.GetColumns(this.reader, this.options);
ColumnsWriter.WriteColumns(this.context);
this.isHeaderWritten = true;
}
/// <summary>
/// Serialize an <see cref="System.Data.IDataReader"/> to a binary stream using protocol-buffers.
/// </summary>
/// <param name="stream">The <see cref="System.IO.Stream"/> to write to.</param>
/// <param name="reader">The <see cref="System.Data.IDataReader"/>who's contents to serialize.</param>
/// <param name="options"><see cref="ProtoDataWriterOptions"/> specifying any custom serialization options.</param>
public void Serialize(Stream stream, IDataReader reader, ProtoDataWriterOptions options)
{
Throw.IfNull(stream, nameof(stream));
Throw.IfNull(reader, nameof(reader));
options = options ?? new ProtoDataWriterOptions();
var resultIndex = 0;
using (var writer = new ProtoWriter(stream, null, null))
{
var context = new ProtoWriterContext(writer, options);
do
{
ProtoWriter.WriteFieldHeader(1, WireType.StartGroup, writer);
context.StartSubItem(resultIndex);
context.Columns = ProtoDataColumnFactory.GetColumns(reader, options);
ColumnsWriter.WriteColumns(context);
var recordIndex = 0;
while (reader.Read())
{
RecordWriter.WriteRecord(context, recordIndex, reader);
recordIndex++;
}
context.EndSubItem();
resultIndex++;
}while (reader.NextResult());
}
}