/// <summary>
/// Reads a keyword from the input stream.
/// </summary>
private object ReadKeyword()
{
JSonReaderTokenInfo topToken = PopTopToken();
// top token contains the first letter of current keyword:
StringBuilder buffer = new StringBuilder(topToken.Text);
int lastLine = _input.Line;
int lastOffset = _input.LineOffset;
StringHelper.ReadKeywordChars(_input, buffer);
// since keyword has no closing token (as arrays or strings), it might
// happen that we read too many chars... so put that new char as a token on the
// stack and instruct reader that token is already there...
ReadNextToken(char.IsWhiteSpace(_input.CurrentChar));
_getTokenFromStack = true;
string keyword = buffer.ToString().ToLower();
foreach (var k in AvailableKeywords)
{
if (k.Token == keyword)
{
return(_factory.CreateKeyword(k));
}
}
// token has not been found:
throw new JSonReaderException("Unknown keyword", keyword, lastLine, lastOffset);
}
private object ReadItem(BSonItemType type, out string key)
{
int length;
int dataOffset;
key = _input.ReadStringUTF8(int.MaxValue);
dataOffset = _input.Offset;
switch (type)
{
case BSonItemType.Double:
return(_factory.CreateNumber(_input.ReadDouble()));
case BSonItemType.String:
case BSonItemType.JavaScript:
case BSonItemType.Symbol:
length = _input.ReadInt32();
return(_factory.CreateString(_input.ReadStringUTF8(length)));
case BSonItemType.Object:
return(ReadDocument());
case BSonItemType.Array:
return(ReadArray());
case BSonItemType.Binary:
throw new FormatException("Unsupported 'binary' field at " + dataOffset);
case BSonItemType.Undefined:
throw new FormatException("Unsupported 'undefined' field at " + dataOffset);
case BSonItemType.ObjectID:
throw new FormatException("Unsupported 'object-id' field at " + dataOffset);
case BSonItemType.Boolean:
return(_factory.CreateKeyword(_input.ReadByte() > 0 ? JSonReader.TrueTokenData : JSonReader.FalseTokenData));
case BSonItemType.DateTime:
return(_factory.CreateNumber(_input.ReadUInt64()));
case BSonItemType.Null:
return(_factory.CreateKeyword(JSonReader.FalseTokenData));
case BSonItemType.RegExp:
return(ReadRegExp());
case BSonItemType.DbPointer:
throw new FormatException("Unsupported 'DbPointer' field at " + dataOffset);
case BSonItemType.JavaScriptScoped:
return(ReadJavaScriptScoped());
case BSonItemType.Int32:
return(_factory.CreateNumber(_input.ReadInt32()));
case BSonItemType.Timestamp:
return(_factory.CreateNumber(_input.ReadInt64()));
case BSonItemType.Int64:
return(_factory.CreateNumber(_input.ReadInt64()));
default:
throw new FormatException("Unsupported '" + type + "' field at " + dataOffset);
}
}
