StringParser.java

//    Chromis POS  - The New Face of Open Source POS
//    Copyright (c) (c) 2015-2016
//    http://www.chromis.co.uk
//
//    This file is part of Chromis POS
//
//     Chromis POS is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    Chromis POS is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Chromis POS.  If not, see <http://www.gnu.org/licenses/>.

package uk.chromis.pos.util;

/**
 *
 *   
 */
public class StringParser {
    
    private int currentPosition;
    private int maxPosition;
    private String str;
    
    /** Creates a new instance of StringParser
     * @param str */
    public StringParser(String str) {
        this.str = str;
        currentPosition = 0;
        maxPosition = str == null ? 0 : str.length();
    }
    
    /**
     *
     * @param c
     * @return
     */
    public String nextToken(char c) {
       
        if (currentPosition < maxPosition) {

            int start = currentPosition;
            while (currentPosition < maxPosition && c != str.charAt(currentPosition)) {
                currentPosition ++;
            }

            if (currentPosition < maxPosition) {
                return str.substring(start, currentPosition++);
            } else {
                return str.substring(start);
            }
        } else {
            return "";
        }
    }
}