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Chapter 14: Successive Refinement

• Nothing but code

  private Map<Character, Boolean> booleanArgs =
      new HashMap<Character, Boolean>();
  private Map<Character, String> stringArgs =
      new HashMap<Character, String>();
  private Map<Character, Integer> intArgs =
      new HashMap<Character, Integer>();
  
  private boolean setArgument(char argChar) throws ArgsException {
    if (isBooleanArg(argChar))
      setBooleanArg(argChar, true);
    else if (isStringArg(argChar))
      setStringArg(argChar);
    else if (isIntArg(argChar))
      setIntArg(argChar);
    else
      return false;
    return true;
  }
  
  private void setBooleanArg(char argChar, boolean value) {
    booleanArgs.put(argChar, value);
  }
  private boolean isBooleanArg(char argChar) {
    return booleanArgs.containsKey(argChar);
  }
  -----------------
  private Map<Character, ArgumentMarshaler> marshalers =
      new HashMap<Character, ArgumentMarshaler>();
  
  private boolean setArgument(char argChar) throws ArgsException {
    ArgumentMarshaler m = marshalers.get(argChar);
    try {
      if (m instanceof BooleanArgumentMarshaler)
        setBooleanArg(m);
      else if (m instanceof StringArgumentMarshaler)
        setStringArg(m);
      else if (m instanceof IntegerArgumentMarshaler)
        setIntArg(m);
      else
        return false;
    } catch (ArgsException e) {
      valid = false;
      errorArgumentId = argChar;
      throw e;
    }
    return true;
  }
  -----------------
  private boolean setArgument(char argChar) throws ArgsException {
    ArgumentMarshaler m = marshalers.get(argChar);
    if (m == null)
      return false;
    try {
      if (m instanceof BooleanArgumentMarshaler)
        setBooleanArg(m, currentArgument);
      else if (m instanceof StringArgumentMarshaler)
        setStringArg(m);
      else if (m instanceof IntegerArgumentMarshaler)
        setIntArg(m);
      } catch (ArgsException e) {
      valid = false;
      errorArgumentId = argChar;
      throw e;
    }
    return true;
  }
  -----------------
  private boolean setArgument(char argChar) throws ArgsException {
    ArgumentMarshaler m = marshalers.get(argChar);
    if (m == null)
      return false;
    try {
      if (m instanceof BooleanArgumentMarshaler)
        m.set(currentArgument);
      else if (m instanceof StringArgumentMarshaler)
        setStringArg(m);
      else if (m instanceof IntegerArgumentMarshaler)
        setIntArg(m);
    } catch (ArgsException e) {
      valid = false;
      errorArgumentId = argChar;
      throw e;
    }
    return true;
  }
  -----------------
  private boolean setArgument(char argChar) throws ArgsException {
    ArgumentMarshaler m = marshalers.get(argChar);
    if (m == null)
      return false;
    try {
      m.set(currentArgument);
      return true;
    } catch (ArgsException e) {
      valid = false;
      errorArgumentId = argChar;
      throw e;
    }
  }
  

• So the solution is to continuously keep your code as clean and simple as it can be. Never let the rot get started.

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