public static TzDbZoneContinuation Parse(Queue <Token> unProcessedTokens, String timeZoneName)
{
try
{
TimeSpan gmtOff = TimeSpanExpression.Parse(unProcessedTokens);
string rules = unProcessedTokens.Dequeue().Value;
TimeZoneAbbreviationFormat format =
TimeZoneAbbreviationFormatExpression.Parse(unProcessedTokens);
// until is optional
TzDbAbstractDateTime until;
TzDbDateTimeExpression.TryParse(unProcessedTokens, out until);
Token endLineToken = unProcessedTokens.Dequeue();
// guard end of line token was present
if (endLineToken.TokenType != TokenType.EndLine)
{
string msg = String.Format(
"received unexpected token type:{0} when token type should have been {1}",
endLineToken.TokenType, TokenType.EndLine);
throw new Exception(msg);
}
return(new TzDbZoneContinuation(gmtOff, rules, format, until));
}
catch (Exception e)
{
throw new Exception("Error occured while parsing zone continuation expression", e);
}
}
public static bool TryParse(Queue <Token> unProcessedTokens, out TzDbZone?tzDbZone)
{
// the value of the first token of every link entry is Link
const String linkRegex = "Zone";
if (Regex.IsMatch(unProcessedTokens.Peek().Value, linkRegex))
{
try
{
// dequeue Zone token and discard
unProcessedTokens.Dequeue();
string ianaId = unProcessedTokens.Dequeue().Value;
TimeSpan gmtOff = TimeSpanExpression.Parse(unProcessedTokens);
string rules = unProcessedTokens.Dequeue().Value;
TimeZoneAbbreviationFormat format = TimeZoneAbbreviationFormatExpression.Parse(unProcessedTokens);
// until is optional
TzDbAbstractDateTime until;
TzDbDateTimeExpression.TryParse(unProcessedTokens, out until);
tzDbZone = new TzDbZone(gmtOff, rules, format, ianaId, until);
Token endLineToken = unProcessedTokens.Dequeue();
// guard end of line token was present
if (endLineToken.TokenType != TokenType.EndLine)
{
string msg = String.Format(
"received unexpected token type:{0} when token type should have been {1}",
endLineToken.TokenType, TokenType.EndLine);
throw new Exception(msg);
}
return(true);
}
catch (Exception e)
{
throw new Exception("Error occured while parsing zone expression", e);
}
}
tzDbZone = null;
return(false);
}