public byte[] SaveEnvelopeData(ImmutableEnvelope envelope)
{
// string contract, Guid messageId, Uri sender,
var itemContracts = new MessageContract[envelope.Items.Length];
using (var content = new MemoryStream())
{
int position = 0;
for (int i = 0; i < envelope.Items.Length; i++)
{
var item = envelope.Items[i];
string name;
if (!_dataSerializer.TryGetContractNameByType(item.MappedType, out name))
{
var error = string.Format("Failed to find contract name to serialize '{0}'.", item.MappedType);
throw new InvalidOperationException(error);
}
// normal serializers have a nasty habbit of closing the stream after they are done
// we can suppress that or use a wrapper now instead
using (var itemStream = new MemoryStream())
{
_dataSerializer.Serialize(item.Content, item.MappedType, itemStream);
var bytes = itemStream.ToArray();
content.Write(bytes, 0, bytes.Length);
}
int size = (int)content.Position - position;
var attribContracts = EnvelopeConvert.ItemAttributesToContract(item.GetAllAttributes());
itemContracts[i] = new MessageContract(name, size, position, attribContracts);
position += size;
}
var envelopeAttribs = EnvelopeConvert.EnvelopeAttributesToContract(envelope.GetAllAttributes());
var contract = new EnvelopeContract(envelope.EnvelopeId, envelopeAttribs, itemContracts,
envelope.DeliverOnUtc, envelope.CreatedOnUtc);
using (var stream = new MemoryStream())
{
// skip header
stream.Seek(EnvelopeHeaderContract.FixedSize, SeekOrigin.Begin);
// save envelope attributes
_envelopeSerializer.SerializeEnvelope(stream, contract);
var envelopeBytes = stream.Position - EnvelopeHeaderContract.FixedSize;
// copy data
content.WriteTo(stream);
// write the header
stream.Seek(0, SeekOrigin.Begin);
var header = new EnvelopeHeaderContract(EnvelopeHeaderContract.Schema2DataFormat, envelopeBytes, 0);
header.WriteToStream(stream);
return(stream.ToArray());
}
}
}