public PatternTokenizer(String str) 
{
        
            sr = new StringReader(str);
}

 public String getParameter() throws IOException 
{
            String result;
            if (!parameter) {
                return null;
            }
            parameter = false;
            int c = sr.read();
            while (c != -1) {
                if (c == ')") {
                    result = buf.toString();
                    buf = new StringBuffer();
                    return result;
                }
                buf.append((char) c);
                c = sr.read();
            }
            return null;
}

 public String getRemains() throws IOException 
{
            StringBuffer remains = new StringBuffer();
            for(int c = sr.read(); c != -1; c = sr.read()) {
                remains.append((char) c);
            }
            return remains.toString();
}

 public String getToken() throws IOException 
{
            if(ended)
                return null ;
            String result = null;
            subToken = false;
            parameter = false;
            int c = sr.read();
            while (c != -1) {
                switch (c) {
                case ' ":
                    result = buf.toString();
                    buf = new StringBuffer();
                    buf.append((char) c);
                    return result;
                case '-":
                    result = buf.toString();
                    buf = new StringBuffer();
                    subToken = true;
                    return result;
                case '(":
                    result = buf.toString();
                    buf = new StringBuffer();
                    parameter = true;
                    return result;
                case ')":
                    result = buf.toString();
                    buf = new StringBuffer();
                    break;
                default:
                    buf.append((char) c);
                }
                c = sr.read();
            }
            ended = true;
            if (buf.length() != 0) {
                return buf.toString();
            } else {
                return null;
            }
}

 public String getWhiteSpaces() throws IOException 
{
            if(isEnded())
                return "" ;
            StringBuffer whiteSpaces = new StringBuffer();
            if (buf.length()  > 0) {
                whiteSpaces.append(buf);
                buf = new StringBuffer();
            }
            int c = sr.read();
            while (Character.isWhitespace((char) c)) {
                whiteSpaces.append((char) c);
                c = sr.read();
            }
            if (c == -1) {
                ended = true;
            } else {
                buf.append((char) c);
            }
            return whiteSpaces.toString();
}

 public boolean hasParameter() 
{
            return parameter;
}

 public boolean hasSubToken() 
{
            return subToken;
}

 public boolean isEnded() 
{
            return ended;
}