code: /* LanguageTool, a natural language style checker 
   * Copyright (C) 2016 Daniel Naber (http://www.danielnaber.de)
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.dev.bigdata;
  
  import org.languagetool.languagemodel.LuceneLanguageModel;
  import org.languagetool.rules.ngrams.Probability;
  
  import java.io.File;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * Simple ngram count lookup.
   */
  final class NGramLookup {
  
    private NGramLookup() {
    }
  
    public static void main(String[] args) throws IOException {
      if (args.length < 2) {
        System.out.println("Usage: " + NGramLookup.class.getName() + " <ngram...|file> <ngramDataIndex>");
        System.out.println("  Example: " + NGramLookup.class.getName() + " \"my house\" /data/ngram-index");
        System.out.println("  Example: " + NGramLookup.class.getName() + " /tmp/words.txt /data/ngram-index");
        System.exit(1);
      }
      String indexTopDir = args[args.length-1];
      try (LuceneLanguageModel lm = new LuceneLanguageModel(new File(indexTopDir))) {
        double totalP = 1;
        File maybeFile = new File(args[0]);
        if (args.length == 2 && maybeFile.isFile()) {
          List<String> lines = Files.readAllLines(maybeFile.toPath());
          for (String line : lines) {
            long count = lm.getCount(line);
            System.out.println(count + "\t" + line);
          }
        } else {
          for (int i = 0; i < args.length -1; i++) {
            String[] lookup = args[i].split(" ");
            long count = lm.getCount(Arrays.asList(lookup));
            Probability p = lm.getPseudoProbability(Arrays.asList(lookup));
            System.out.println(Arrays.toString(lookup) + " -> count:" + count + ", " + p + ", log:" + Math.log(p.getProb()));
            totalP *= p.getProb();
          }
          System.out.println("totalP=" + totalP);
        }
      }
    }
  }
  