code: package edu.jhu.thrax.tools;
  
  import java.io.BufferedWriter;
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.PriorityQueue;
  import java.util.logging.Logger;
  
  import edu.jhu.jerboa.util.FileManager;
  import edu.jhu.thrax.util.FormatUtils;
  import edu.jhu.thrax.util.io.LineReader;
  
  public class ParaphraseWordNet {
  
    private static final Logger logger = Logger.getLogger(ParaphraseWordNet.class.getName());
  
    public static void main(String[] args) {
  
      String grammar_file = null;
      String reference_file = null;
      String weight_file = null;
      String output_file = null;
      String relevant_file = null;
  
      for (int i = 0; i < args.length; i++) {
        if ("-g".equals(args[i]) && (i < args.length - 1)) {
          grammar_file = args[++i];
        } else if ("-r".equals(args[i]) && (i < args.length - 1)) {
          reference_file = args[++i];
        } else if ("-v".equals(args[i]) && (i < args.length - 1)) {
          relevant_file = args[++i];
        } else if ("-w".equals(args[i]) && (i < args.length - 1)) {
          weight_file = args[++i];
        } else if ("-o".equals(args[i]) && (i < args.length - 1)) {
          output_file = args[++i];
        }
      }
  
      if (grammar_file == null) {
        logger.severe("No grammar specified.");
        return;
      }
      if (reference_file == null) {
        logger.severe("No reference file specified.");
        return;
      }
      if (weight_file == null) {
        logger.severe("No weight file specified.");
        return;
      }
      if (output_file == null) {
        logger.severe("No output file specified.");
        return;
      }
  
      HashSet<String> reference_pairs = new HashSet<String>();
      HashSet<String> sources = new HashSet<String>();
      HashMap<String, Double> weights = new HashMap<String, Double>();
      try {
        LineReader reference_reader = new LineReader(reference_file);
        while (reference_reader.hasNext()) {
          String line = reference_reader.next().trim();
          String[] fields = FormatUtils.P_DELIM.split(line);
          reference_pairs.add(line);
          sources.add(fields[1]);
        }
        reference_reader.close();
  
        LineReader weights_reader = new LineReader(weight_file);
        while (weights_reader.hasNext()) {
          String line = weights_reader.next().trim();
          if (line.isEmpty()) continue;
          String[] fields = FormatUtils.P_SPACE.split(line);
          weights.put(fields[0], Double.parseDouble(fields[1]));
        }
        weights_reader.close();
  
        HashMap<String, Double> candidates = new HashMap<String, Double>();
  
        BufferedWriter rel_writer = null;
        if (relevant_file != null) rel_writer = FileManager.getWriter(relevant_file);
  
        LineReader reader = new LineReader(grammar_file);
        System.err.print("[");
        int count = 0;
        while (reader.hasNext()) {
          String rule_line = reader.next().trim();
  
          String[] fields = FormatUtils.P_DELIM.split(rule_line);
  
          if (!fields[0].startsWith("[VB") && !fields[0].startsWith("[NN")
              && !fields[0].startsWith("[JJ") && !fields[0].startsWith("[RB")
              && (!fields[1].contains(",1]"))) continue;
  
          String lhs = "[V]";
          if (fields[0].startsWith("[NN")) lhs = "[N]";
          if (fields[0].startsWith("[JJ")) lhs = "[A]";
          // Questionable tag, but the synsets don't seem to contain any adverbs anyway.
          if (fields[0].startsWith("[RB")) lhs = "[A]";
  
          String source = fields[1];
          String target = fields[2];
  
          if (!sources.contains(source)) continue;
  
          if (rel_writer != null) rel_writer.write(rule_line + "\n");
  
          double score = 0;
          String[] features = FormatUtils.P_SPACE.split(fields[3]);
          for (String f : features) {
            String[] parts = f.split("=");
            if (weights.containsKey(parts[0]))
              score += weights.get(parts[0]) * Double.parseDouble(parts[1]);
          }
  
          if (++count % 10000 == 0) System.err.print("-");
  
          String candidate = lhs + " ||| " + source + " ||| " + target;
  
          if (!candidates.containsKey(candidate)) {
            candidates.put(candidate, score);
          } else {
            double previous = candidates.get(candidate);
            candidates.put(candidate, Math.max(score, previous));
          }
        }
        System.err.println("]");
        reader.close();
        if (rel_writer != null) rel_writer.close();
  
        int num_paraphrases = 0;
        int num_correct = 0;
        int num_references = reference_pairs.size();
  
        PriorityQueue<ScoredEntry> entries = new PriorityQueue<ScoredEntry>();
        for (String p : candidates.keySet()) {
          if (reference_pairs.contains(p)) num_correct++;
          num_paraphrases++;
          entries.add(new ScoredEntry(p, candidates.get(p)));
        }
  
        System.err.println("References : " + num_references);
        System.err.println("Paraphrases: " + num_paraphrases);
        System.err.println("Correct:     " + num_correct);
  
        BufferedWriter score_writer = FileManager.getWriter(output_file);
        while (!entries.isEmpty()) {
          ScoredEntry e = entries.poll();
          if (reference_pairs.contains(e.pair)) {
            score_writer.write((num_correct / (double) num_references) + "\t"
                + (num_correct / (double) num_paraphrases) + "\n");
            num_correct--;
          }
          num_paraphrases--;
        }
        score_writer.close();
      } catch (IOException e) {
        logger.severe(e.getMessage());
      }
    }
  }
  