/** closes resources and write everything to file */
  public void shutdown() {

    pdb.closeDB(); // save the db
    if (newWeights == null) {
      newWeights = origWeights;
    }
    writePropertyFile(
        newWeights, genProps.getProperty("outWeightsLoc", genProps.getProperty("inWeightsLoc")));
    userInterface.closeResources();
    System.out.println("preferences saved and closed without error.");
  }
 /**
  * Loads the case history into cache. This is where the background database chosen.
  *
  * @param dLoc the location of the database
  */
 public void loadDB() {
   try {
     // TODO what about if we want to create a new db?
     if (!Boolean.parseBoolean(genProps.getProperty("newDB"))) {
       pdb.loadDB();
     }
   } catch (Exception e) {
     System.err.println("Something wrong with loading DB");
   }
   try {
     loadCLPolicies();
   } catch (Exception e) {
     System.err.println("Error. Probably wrong path to P3P folder");
   }
 }
  /** loads [additional] policies from commandline (either -p or -f) */
  private void loadCLPolicies() {
    // we already checked to make sure we have one of the options avaliable
    File pLoc = null;
    PolicyObject p = null;

    if (genProps.getProperty("p3pLocation", null) != null) {
      pLoc = new File(genProps.getProperty("p3pLocation"));
      if (!pLoc.exists()) {
        System.err.println(
            "no file found at p3p policy location specified by the -p3p option: "
                + genProps.getProperty("p3pLocation"));
        System.err.println("current location is " + System.getProperty("user.dir"));
        System.exit(1);
      }
      try {
        p = (new P3PParser()).parse(pLoc.getAbsolutePath());
        if (p.getContextDomain() == null) {
          p.setContext(
              new Context(
                  new Date(System.currentTimeMillis()),
                  new Date(System.currentTimeMillis()),
                  genProps.getProperty("p3pLocation")));
        }
        pdb.addPolicy(p);
      } catch (Exception e) {
        System.err.println("Error with parsing or database");
        e.printStackTrace();
        // System.exit(5);
      }
    }
    if (genProps.getProperty("p3pDirLocation", null) != null) {
      pLoc = new File(genProps.getProperty("p3pDirLocation"));
      File[] pfiles = pLoc.listFiles();

      // System.err.println("pfiles for p3pDirLocation: "+pfiles);
      for (int i = 0; i < pfiles.length; i++) {

        pLoc = (pfiles[i]);
        if (!pLoc.exists()) {
          System.err.println(
              "no file found at p3p policy location specified by the -p3pDirLocation option, "
                  + genProps.getProperty("p3pDirLocation"));
          System.exit(1);
        }
        try {

          p = (new P3PParser()).parse(pLoc.getAbsolutePath());
          if (p.getContext().getDomain() == null) {
            p.setContext(
                new Context(
                    new Date(System.currentTimeMillis()),
                    new Date(System.currentTimeMillis()),
                    pfiles[i].getAbsolutePath()));
          }
          pdb.addPolicy(p);
        } catch (Exception e) {
          System.err.println("Einar needs to fix this parsing error.");
          e.printStackTrace();
        }
      }
    }
  }