public File getRunDir(Run run) {
    String runName = run.getName();
    if (runName == null) throw new IllegalArgumentException("Run doesn't have a name.");

    File runDir = new File(root, runName);

    if (!runDir.exists()) runDir.mkdir();

    return runDir;
  }
  public boolean needsToRun(Run run, int generation) {
    Population pop = getPopulationFor(run, generation);
    int count = run.getIntProperty(GenetikConstants.POPULATION, Integer.MAX_VALUE, true);
    int scoreCount = 0;

    for (int i = 0, max = pop.size(); i < max; i++) {
      Individual ind = pop.get(i);

      if (ind.hasFitness() && ind.hasScores()) {
        scoreCount++;
      }
    }

    return scoreCount != count;
  }