The Fallback DFA is a modified version of a DFA that allows for lexing (tokenizing) input strings. It reads a formatted string representation of the DFA and simulates its behavior on input strings to tokenize them. The tokenization process involves recognizing patterns in the input string based on the DFA's states and transitions.
Clone the repository to your local machine:
git clone https://github.com/username/FallbackDFA.gitTo use the FallbackDFA class in your Java project, simply include the FallbackDfa.java file in your project directory. You can then create an instance of the FallbackDfa class and use its run() method to tokenize input strings.
Example usage:
String fdfaRepresentation = "state1;state2;state3#symbol1;symbol2;symbol3#state1,symbol1,state2;state2,symbol2,state3#state1#state3";
FallbackDfa dfa = new FallbackDfa(fdfaRepresentation);
String input = "input_string_to_tokenize";
String tokens = dfa.run(input);
System.out.println("Tokens: " + tokens);The input to the FallbackDfa constructor and the run() method follows a specific format:
state1;state2;state3#symbol1;symbol2;symbol3#state1,symbol1,state2;state2,symbol2,state3#start_state#accept_states
The run() method returns a formatted string representation of the list of tokens. The string representation follows the one described in the input format.