if (clause == null) {

      return null;

    }

    clause = clause.trim();

    if (clause.length() == 0) {

      return null;

    }

 

    String[] tokens = tokenize(clause, getDelimiter());

    ArrayList parameters = new ArrayList();

    for (int i = 1; i < tokens.length; i++) {

      parameters.add(tokens[i]);

    }

 

    Command command = (Command) commands.get(tokens[0]);

    if (command == null) {

      throw new UnknownCommandError(tokens[0]);

    }

 

    return command.run(getContext(), parameters);

  }

 

  public String[] tokenize(String s, String d) {

    return s.split(d);

  }

Реализовав строковый режим, мы легко можем реализовать и потоковый:

  public void interpret(BufferedReader in,

    PrintWriter out, PrintWriter err)

    throws IOException {

 

    while (true) {

      String prompt = context.getProperty("$PROMPT");

      if (prompt != null && prompt.length() > 0) {

        out.print(prompt);

        out.flush();

      }

 

      String clause = in.readLine();

      if (clause == null) {

        break;

      }

 

      String result = null;

      try {

        result = interpretClause(clause);

      } catch (CliError ce) {

        err.println(ce);

        if (mustStopOnError()) {

          break;

        }

      }

 

      if (result != null) {

        out.println(result);

      }

 

      if (mustQuit()) {

        break;

      }

---

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