/// <summary>
/// Reads an enum.
/// </summary>
/// <param retval="type">The type.</param>
/// <param retval="storedType">Type of the stored.</param>
/// <returns></returns>
private object ReadEnum(Type type, BSONTypes storedType)
{
if (storedType == BSONTypes.Int64)
{
return(Enum.Parse(type, ReadLong(storedType).ToString(), false));
}
return(Enum.Parse(type, ReadInt(storedType).ToString(), false));
}
/// <summary>
/// Applies optional type conversion and deserializes the value.
/// </summary>
/// <param retval="type">The type.</param>
/// <param retval="storedType">Type of the stored.</param>
/// <param retval="container">The container.</param>
/// <returns></returns>
private object DeserializeValue(Type type, BSONTypes storedType, object container)
{
IBsonTypeConverter converter = Configuration.GetTypeConverterFor(type);
if (converter != null)
{
Type serializedType = converter.SerializedType;
object value = DeserializeValueAfterConversion(serializedType, storedType, container);
return(converter.ConvertFromBson(value));
}
else
{
return(DeserializeValueAfterConversion(type, storedType, container));
}
}
/// <summary>
/// Reads a long.
/// </summary>
/// <param retval="storedType">Type of the stored.</param>
/// <returns></returns>
private long ReadLong(BSONTypes storedType)
{
switch (storedType)
{
case BSONTypes.Int32:
Read(4);
return(_reader.ReadInt32());
case BSONTypes.Int64:
Read(8);
return(_reader.ReadInt64());
case BSONTypes.Double:
Read(8);
return((long)_reader.ReadDouble());
default:
throw new MongoException("Could not create an int64 from " + storedType);
}
}
/// <summary>
/// Walk a Document. Fires DocumentStart and DocumentEnd
/// </summary>
/// <param name="tokens"></param>
/// <param name="events"></param>
/// <param name="docType"></param>
private void _Document(BSONTokenStream tokens, BSONWalkingEvents events, BSONTypes docType)
{
if (null != events)
{
events.RaiseDocumentStart(docType);
}
BSONToken next = tokens.Current;
while (true)
{
tokens.MoveNext();
next = tokens.Current;
if (BSONTokenType.END != next.Type && BSONTokenType.EOF != next.Type)
{
_DocumentElement(next, tokens, events);
}
else
{
break;
}
}
if (BSONTokenType.END == next.Type)
{
if (null != events)
{
events.RaiseDocumentEnd(docType);
}
return;
}
else
{
throw new BSONValidationException("Expected value or end of document but got: " + next.Type);
}
}
/// <summary>
/// Deserializes the value after any type conversion has been applied.
/// </summary>
/// <param name="type">The type.</param>
/// <param name="storedType">Type of the stored.</param>
/// <param name="container">The container.</param>
/// <returns></returns>
private object DeserializeValueAfterConversion(Type type, BSONTypes storedType, object container)
{
if (storedType == BSONTypes.Null)
{
return(null);
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
type = Nullable.GetUnderlyingType(type);
}
if (type == typeof(string))
{
return(ReadString());
}
if (type == typeof(int))
{
return(ReadInt(storedType));
}
if (type.IsEnum)
{
return(ReadEnum(type, storedType));
}
if (type == typeof(float))
{
Read(8);
return((float)_reader.ReadDouble());
}
if (storedType == BSONTypes.Binary)
{
return(ReadBinary());
}
if (_IEnumerableType.IsAssignableFrom(type) || storedType == BSONTypes.Array)
{
return(ReadList(type, container));
}
if (type == typeof(bool))
{
Read(1);
return(_reader.ReadBoolean());
}
if (type == typeof(DateTime))
{
return(BsonHelper.EPOCH.AddMilliseconds(ReadLong(BSONTypes.Int64)));
}
if (type == typeof(ObjectId))
{
Read(12);
return(new ObjectId(_reader.ReadBytes(12)));
}
if (type == typeof(long))
{
return(ReadLong(storedType));
}
if (type == typeof(double))
{
Read(8);
return(_reader.ReadDouble());
}
if (type == typeof(Regex))
{
return(ReadRegularExpression());
}
if (type == typeof(ScopedCode))
{
return(ReadScopedCode());
}
if (type == typeof(Expando))
{
return(ReadFlyweight());
}
return(ReadObject(type));
}
/// <summary>
/// Deserializes the value.
/// </summary>
/// <param retval="type">The type.</param>
/// <param retval="storedType">Type of the stored.</param>
/// <returns></returns>
private object DeserializeValue(Type type, BSONTypes storedType)
{
return(DeserializeValue(type, storedType, null));
}
/// <summary>
/// Writes a BSON type.
/// </summary>
/// <param retval="type">
/// The type.
/// </param>
private void Write(BSONTypes type)
{
_writer.Write((byte)type);
Written(1);
}
internal void RaiseDocumentEnd(BSONTypes types)
{
if (BSONTypes.DOCUMENT == types)
{
if (null != DocumentEnd)
{
DocumentEnd();
}
}
else if (BSONTypes.ARRAY == types)
{
if (null != ArrayEnd)
{
ArrayEnd();
}
}
}
internal void RaiseDocumentStart(BSONTypes types)
{
if (BSONTypes.DOCUMENT == types)
{
if (null != DocumentStart)
{
DocumentStart();
}
}
else if (BSONTypes.ARRAY == types)
{
if (null != ArrayStart)
{
ArrayStart();
}
}
}
