SentenceGenerator.java

package sentenceGenerator;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.swing.JFileChooser;

/**
 * This is my version of a CIT594 assignment to read in a BNF grammar
 * and produce sentences from that grammar.
 */
public class SentenceGenerator {
    private Grammar grammar;
    private Random random = new Random();

    /**
     * Prompts the user for a file containing a BNF grammar, then
     * generates several sentences from that grammar.
     * 
     * @param args Unused.
     */
    public static void main(String[] args) {
        try {
            new SentenceGenerator().run();
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Does the work of this class.
     * 
     * @throws IOException If an input exception occurs.
     */
    private void run() throws IOException {
        
        // TODO: Your code goes here
        
    }
    
    /**
     * Expands the given term into a list of terminals. If the given
     * term is already a terminal, a list containing this single term
     * is returned.
     * 
     * @param term A terminal or nonterminal to expand into a list.
     * @return A list of terminals.
     */
    List<String> generate(String term) {
        List<String> result = new ArrayList<String>();

        // TODO: Your code goes here

        return result;
    }

    /**
     * Randomly choose and return one element from a list.
     * 
     * @param list The list from which the selection is to be made.
     * @return The randomly selected element.
     */
    private Object chooseRandomElement(List list) {
        return (list.get(random.nextInt(list.size())));
    }

    /**
     * Prints the given list of words as a sentence. The first word is
     * capitalized, and a period is printed at the end.
     * 
     * @param list The words to be printed.
     */
    void printAsSentence(List<String> list) {
        // TODO: Your code goes here
    }
    
    /**
     * Prompts the user to choose a file, which should contain a BNF grammar.
     * 
     * @return The chosen file, or <code>null</code> if none is chosen.
     */
    private BufferedReader getFileReader() {
        BufferedReader reader = null;
        
        // TODO: Your code goes here

        return reader;
    }
}