public Object ReadElementType(sbyte typeNum)
{
switch ((BsonDataType)typeNum) {
case BsonDataType.Null:
case BsonDataType.Undefined:
return MongoDBNull.Value;
case BsonDataType.MinKey:
return MongoMinKey.Value;
case BsonDataType.MaxKey:
return MongoMaxKey.Value;
case BsonDataType.Boolean:
position++;
return reader.ReadBoolean ();
case BsonDataType.Integer:
position += 4;
return reader.ReadInt32 ();
case BsonDataType.Long:
position += 8;
return reader.ReadInt64 ();
case BsonDataType.Date:
position += 8;
long millis = reader.ReadInt64 ();
return epoch.AddMilliseconds (millis);
case BsonDataType.Oid:
position += 12;
return new Oid (reader.ReadBytes (12));
case BsonDataType.Number:
position += 8;
return reader.ReadDouble ();
case BsonDataType.String:{
return ReadLenString ();
}
case BsonDataType.Obj:{
Document doc = this.ReadDocument();
if(DBRef.IsDocumentDBRef(doc)){
return DBRef.FromDocument(doc);
}
return doc;
}
case BsonDataType.Array:{
Document doc = this.ReadDocument();
if (ElementsSameType (doc)) {
return ConvertToArray (doc);
} else {
return doc;
}
}
case BsonDataType.Regex:{
MongoRegex r = new MongoRegex ();
r.Expression = this.ReadString ();
r.Options = this.ReadString ();
return r;
}
case BsonDataType.Code:{
Code c = new Code ();
c.Value = ReadLenString();
return c;
}
case BsonDataType.CodeWScope:{
int startpos = position;
int size = reader.ReadInt32 ();
position += 4;
String val = this.ReadLenString();
Document scope = this.ReadDocument();
if (size != position - startpos) {
throw new System.IO.InvalidDataException (string.Format ("Should have read {0} bytes from stream but read {1} in CodeWScope", size, position - startpos));
}
return new CodeWScope (val, scope);
}
case BsonDataType.Binary:{
int size = reader.ReadInt32 ();
position += 4;
byte subtype = reader.ReadByte ();
position ++;
if (subtype == (byte)Binary.TypeCode.General) {
size = reader.ReadInt32 ();
position += 4;
}
byte[] bytes = reader.ReadBytes (size);
position += size;
Binary b = new Binary ();
b.Bytes = bytes;
b.Subtype = (Binary.TypeCode)subtype;
return b;
}
default:
throw new ArgumentOutOfRangeException (String.Format ("Type Number: {0} not recognized", typeNum));
}
}
public static BsonRegex From(MongoRegex val)
{
return new BsonRegex(val.Expression, val.Options);
}
private MongoRegex ParseRegEx(char[] json, ref int index)
{
EatWhitespace(json, ref index);
var c = json[index++];
if(c != '/')
return null;
var lastIndex = GetLastIndexOfRegEx(json, index);
int charLength = lastIndex - index;
char[] charArray = new char[charLength];
Array.Copy(json, index, charArray, 0, charLength);
var mr = new MongoRegex(new string(charArray));
index = lastIndex+1;
if(index < json.Length)
{
if(json[index] == 'i' || json[index] == 'm' || json[index] == 'g')
{
mr.Options = json[index].ToString();
index++;
}
}
return mr;
}
