private IRegexFSMTransition <T> GenerateNFATransitionFromRegexZeroLengthObject(
RegexZeroLengthObject <T> zeroLength,
IRegexNFA <T> nfa,
IRegexNFAState <T> state
)
{
const string PROGRESS_SERVICE_KEY = "PROGRESS_SERVICE";
const string PROGRESS_KEY = "TIMEPOINT";
IRegexNFAState <T> nextState = state;
RegexFSMPredicateTransition <T> predicateTransition;
predicateTransition = new RegexFSMPredicateTransition <T>((sender, args) =>
{
if (args.FirstOrDefault() is IRegexFSM <T> fsm)
{
var progressService = fsm.GetService <RegexFSM <T> .ProgressService>();
var progress = progressService.GetProgress();
fsm.UserData[PROGRESS_SERVICE_KEY] = progressService;
fsm.UserData[PROGRESS_KEY] = progress;
return(true);
}
return(false);
});
nfa.AttachTransition(nextState, predicateTransition);
nextState = this.contextInfo.ActivateRegexNFAState();
nfa.SetTarget(predicateTransition, nextState);
var transition = this.GenerateNFATransitionFromRegexObject(zeroLength.InnerRegex, nfa, nextState);
nextState = this.contextInfo.ActivateRegexNFAState();
nfa.SetTarget(transition, nextState);
predicateTransition = new RegexFSMPredicateTransition <T>((sender, args) =>
{
if (args.FirstOrDefault() is IRegexFSM <T> fsm)
{
var progressService = (RegexFSM <T> .ProgressService)fsm.UserData[PROGRESS_SERVICE_KEY];
var progress = (RegexFSM <T> .ProgressService.Progress)fsm.UserData[PROGRESS_KEY];
progressService.SetProgress(progress);
return(true);
}
return(false);
});
return(predicateTransition);
}
public IRegexFSM <T> GenerateRegexFSMFromRegexObject(RegexObject <T> regex, RegexOptions options)
{
if (regex == null)
{
throw new ArgumentNullException(nameof(regex));
}
IRegexNFA <T> nfa = this.contextInfo.ActivateRegexNFA();
IRegexNFAState <T> startState = this.contextInfo.ActivateRegexNFAState();
nfa.StartState = startState;
IRegexFSMTransition <T> transition = this.GenerateNFATransitionFromRegexObject(regex, nfa, startState);
IRegexNFAState <T> endState = this.contextInfo.ActivateRegexNFAState(true);
nfa.SetTarget(transition, endState);
return(nfa);
}
