public string ExecuteScalar()
{
EnsureConnectionSet();
EnsureNotRunning();
_isRuning = true;
try
{
string[] commandRows = ConstructCommandText(TikCommandParameterFormat.NameValue);
IEnumerable <ApiSentence> response = EnsureApiSentences(_connection.CallCommandSync(commandRows));
ThrowPossibleResponseError(response.ToArray());
if (response.Count() == 1) //!done + =ret=result word
{
ApiDoneSentence doneSentence = EnsureDoneResponse(response.Single());
return(doneSentence.GetResponseWord("ret"));
}
else if (response.Count() >= 2)
{
EnsureReReponse(response.First());
ApiReSentence reResponse = (ApiReSentence)response.First();
EnsureDoneResponse(response.Last());
return(reResponse.Words.First().Value); //first word value from !re
}
else
{
throw new TikConnectionException("Single !done response or at least one !re sentences expected. (1x!done or Nx!re + 1x!done )", this, response.Cast <ITikSentence>());
}
}
finally
{
_isRuning = false;
}
}
private ApiDoneSentence EnsureDoneResponse(ApiSentence responseSentence)
{
ApiDoneSentence doneSentence = responseSentence as ApiDoneSentence;
if (doneSentence == null)
{
throw new TikConnectionException("!done sentence expected as result.", this, responseSentence);
}
return(doneSentence);
}
private string ExecuteScalarInternal(string target, bool allowReturnDefault, string defaultValue = null)
{
EnsureConnectionSet();
EnsureNotRunning();
_isRuning = true;
try
{
var targetParameterInArray = target != null ? new ITikCommandParameter[] { new ApiCommandParameter(TikSpecialProperties.Proplist, target, TikCommandParameterFormat.NameValue) } : new ITikCommandParameter[] { };
string[] commandRows = ConstructCommandText(TikCommandParameterFormat.NameValue, targetParameterInArray);
IEnumerable <ApiSentence> response = EnsureApiSentences(_connection.CallCommandSync(commandRows));
ThrowPossibleResponseError(response.ToArray());
if (response.Count() == 1) //!done + =ret=result word
{
ApiDoneSentence doneSentence = EnsureDoneResponse(response.Single());
if (doneSentence.Words.ContainsKey(TikSpecialProperties.Ret))
{
return(doneSentence.GetResponseWord());
}
else if (allowReturnDefault)
{
return(defaultValue);
}
else
{
throw new TikNoSuchItemException(this);
}
}
else if (response.Count() == 2) //!re + !done
{
EnsureOneReAndDone(response);
ApiReSentence reResponse = (ApiReSentence)response.First();
return(reResponse.Words.Single(v => v.Key != TikSpecialProperties.Tag).Value); //single word value from !re //NOTE - .tag could be added when Connection.SendTagWithSyncCommand=true
}
else
{
throw new TikCommandUnexpectedResponseException("Single !done response or exactly one !re sentences expected. (1x!done or 1x!re + 1x!done )", this, response.Cast <ITikSentence>());
}
}
finally
{
_isRuning = false;
}
}
