public NmeaSentenceResolverEventArgs(NmeaSentence sentence)
{
_Sentence = sentence;
}
/// <summary>
/// Reads a single NMEA sentence then attempts to convert it into an object-oriented form.
/// </summary>
/// <returns></returns>
public NmeaSentence ReadTypedSentence()
{
// First, read a valid sentence
NmeaSentence sentence = ReadValidSentence();
/* 5/4/07: The original design of GPS.NET 2.0 checked the entire command word to determine
* the sentence. However, the NMEA specification states that the first two letters of
* a sentence may change. For example, for "$GPGSV" there may be variations such as
* "$__GSV" where the first two letters change. As a result, we need only test the last three
* characters.
*/
// Is this a GPRMC sentence?
if (sentence.CommandWord.EndsWith("RMC", StringComparison.Ordinal))
{
// Yes. Convert it using the fast pre-parseed constructor
return(new GprmcSentence(sentence.Sentence, sentence.CommandWord, sentence.Words, sentence.ExistingChecksum));
}
if (sentence.CommandWord.EndsWith("RMF", StringComparison.Ordinal))
{
// Yes. Convert it using the fast pre-parseed constructor
return(new PgrmfSentence(sentence.Sentence, sentence.CommandWord, sentence.Words, sentence.ExistingChecksum));
}
else if (sentence.CommandWord.EndsWith("GGA", StringComparison.Ordinal))
{
// Yes. Convert it using the fast pre-parseed constructor
return(new GpggaSentence(sentence.Sentence, sentence.CommandWord, sentence.Words, sentence.ExistingChecksum));
}
else if (sentence.CommandWord.EndsWith("GLL", StringComparison.Ordinal))
{
// Yes. Convert it using the fast pre-parseed constructor
return(new GpgllSentence(sentence.Sentence, sentence.CommandWord, sentence.Words, sentence.ExistingChecksum));
}
else if (sentence.CommandWord.EndsWith("GSV", StringComparison.Ordinal))
{
// Yes. Convert it using the fast pre-parseed constructor
return(new GpgsvSentence(sentence.Sentence, sentence.CommandWord, sentence.Words, sentence.ExistingChecksum));
}
else if (sentence.CommandWord.EndsWith("GSA", StringComparison.Ordinal))
{
// Yes. Convert it using the fast pre-parseed constructor
return(new GpgsaSentence(sentence.Sentence, sentence.CommandWord, sentence.Words, sentence.ExistingChecksum));
}
else
{
// Raise an event to try and parse this
if (ResolveSentence != null)
{
NmeaSentenceResolverEventArgs e = new NmeaSentenceResolverEventArgs(sentence);
ResolveSentence(this, e);
// Was anything returned?
if (e.Result != null)
{
return(e.Result);
}
}
// It's completely unrecognized, so return it as is
return(sentence);
}
}
