/src/spelling/CorrectorLauncher.java

package spelling;



import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.Locale;

import java.util.Scanner;



import spelling.corrector.CorrectorBuilder;

import spelling.corrector.SpellingCorrector;

import spelling.dictionary.Dictionary;



public class CorrectorLauncher {



	public static void main(String[] args) throws IOException {

		try {

			SpellingCorrector sc = handleCommandLine(args);

			Scanner inputScanner = new Scanner(System.in);

			System.out.print("Please enter a word (anything else will quit the application):");

			while(inputScanner.hasNext("[a-zA-Z]+")){

				String toCorrect = inputScanner.next("[a-zA-Z]+");

				String correction = sc.correct(toCorrect.toLowerCase());

				System.out.println(toCorrect+ ":\t did you mean "+ correction);

				System.out.print("\nPlease enter a word:");

			}

			

		} catch (FileNotFoundException e) {

			System.out.println(e.getMessage());

		}

	}

	private static SpellingCorrector handleCommandLine(String[] args) throws IOException {

		boolean hasCommandFlag = args.length > 0;

		String filename = "holmes.txt";

		boolean isVerbose = false;

		if(hasCommandFlag){

			for(int index=0;index<args.length;index++){

				if("-h".equalsIgnoreCase(args[index])){

					showHelp();

				}else if("-f".equalsIgnoreCase(args[index])){

					if(index+1 > args.length){

						showHelp();

					}else{

						if(args[index+1].startsWith("-")){

							showHelp();

						}else{

							filename = args[index+1];

							index++;

						}

					}

				}else if("-v".equalsIgnoreCase(args[index])){

					if(index+1 > args.length){

						//do nothing

					}else{

						isVerbose = true;

					}

				}

				

			}

		}

		Dictionary.load(Locale.ENGLISH, new File(filename));

		

		SpellingCorrector corrector = CorrectorBuilder.buildCorrector(isVerbose);

		return corrector;

	}

	

	private static void showHelp() {

		System.out.println("Usage SpellingCorrector [-h -f filename -v] \n\t-h : Show this help\n\t-f filename : Use this file to train the corrector\n\t-v [all] : Print statistic for methods if \"all\" then print statistic for every methods");

		System.exit(0);

	}

}