public RegularExpressionTransformer(string regularExpression)
{
this.regularExpression = regularExpression;
RegularExpressionPart regularExpressionPart = new RegularExpressionPart()
{
RegularExpression = regularExpression,
RegularExpressionPosition = 0
};
}
public StateMachine Match(string regularExpression)
{
RegularExpressionPart regularExpressionPart = new RegularExpressionPart()
{
RegularExpression = regularExpression,
RegularExpressionPosition = 0
};
StateMachine stateMaschine = new StateMachine();
var result = LoopMatch(regularExpressionPart, stateMaschine);
return(stateMaschine);
}
public StateMachine LoopMatch(RegularExpressionPart regularExpressionPart, StateMachine stateMaschine)
{
var length = regularExpressionPart.RegularExpression.ToArray().Length;
State previousState = null;
State jumpState = null;
var minLength = 0;
for (int i = 0; i < length; i++)
{
var actualIndex = i;
var character = regularExpressionPart.RegularExpression.ToArray()[i];
if (character == LexerItems.QuestionMark)
{
previousState = stateMaschine.AddState(actualIndex, character.ToString(), previousState);
minLength++;
jumpState = null;
}
else if (character == LexerItems.Percent)
{
if (i == 0)
{
State tempPreviousState = previousState;
previousState = stateMaschine.AddState(actualIndex, character.ToString(), previousState, true);
}
else
{
State tempPreviousState = previousState;
previousState = stateMaschine.AddState(actualIndex, character.ToString(), previousState);
}
}
//else if (character == LexerItems.QuestionMark)
//{
// previousState = stateMaschine.AddState(actualIndex, character.ToString(), previousState);
//}
//else if (character == LexerItems.OpenBracket)
//{
// State state = new State(actualIndex, character.ToString());
// bracketOperations.Push(state);
// previousState = stateMaschine.AddState(state, previousState);
//}
//else if (character == LexerItems.CloseBracket)
//{
// State state = new State(actualIndex, character.ToString());
// previousState = stateMaschine.AddState(state, previousState);
// var tempState = bracketOperations.Pop();
// if (tempState.Value == LexerItems.Pipe.ToString())
// {
// tempState.StatusTransitions_.Add(new StatusTransition(state));
// tempState = bracketOperations.Pop();
// if (tempState.Value != LexerItems.Pipe.ToString())
// {
// jumpState = tempState;
// }
// }
// else
// {
// jumpState = tempState;
// }
//}
//else if (character == LexerItems.Pipe)
//{
// State state = new State(actualIndex, character.ToString());
// State bracketOperation = bracketOperations.Peek();
// bracketOperations.Push(state);
// previousState = stateMaschine.AddState(state, previousState);
// var previewCharacter = regularExpressionPart.RegularExpression.ToArray()[i + 1];
// State nextCharacter = new State(actualIndex + 1, previewCharacter.ToString());
// bracketOperation.StatusTransitions_.Add(new StatusTransition(nextCharacter));
// if (nextCharacter.Value == LexerItems.OpenBracket.ToString())
// {
// bracketOperations.Push(nextCharacter);
// }
// stateMaschine.ActualState = nextCharacter;
// previousState = nextCharacter;
// i++;
// jumpState = null;
// minLength = 0;
//}
else
{
previousState = stateMaschine.AddState(actualIndex, character.ToString(), previousState);
minLength++;
jumpState = null;
}
if (stateMaschine.MinLength < minLength)
{
stateMaschine.MinLength = minLength;
}
}
previousState.IsPreviewEndeState = true;
stateMaschine.AddState(length, "Ende", previousState);
return(stateMaschine);
}
