/**
* minimal StringTokenizer implementation.
*/

class StringTokenizer
{
	// the string to be tokenized
	private final String str;
	
	// the delimiter
	private final String delim;
	
	// the token index
	private final int index;
	
	// token buffer
	private final ArrayList<String> tokens;
	
	/**
	 * Creates a new minimal StringTokenizer
	 * @param str
	 * @param delim
	 */
	public StringTokenizer(String str, String delim)
	{
		this.str       = str;
		this.delim     = delim;
		this.tokens    = new ArrayList<String>();
		this.index     = 0;
		// being tokenizing
		tokenize();
	}
	
	/**
	 * Quantizes the String into pieces by separating them via the defined
	 * delimiter
	 */
	private void tokenize() {
		int offset = 0;
		int end    = 0;
		String sub = null;
		
		while( end != -1)
		{
			end = this.str.indexOf(this.delim, offset);
		   
			if(end == -1) 
			{
				sub = this.str.substring(offset);
				this.tokens.add(sub);
				break;
			} else {
				sub = this.str.substring(offset, end);
				this.tokens.add(sub);
			}
			offset = end + 1;
		}
	}
	
	/**
	 * Returns if there more tokens.
	 * @return true if there are more tokens
	 */
	public boolean hasMoreTokens() {
		return this.tokens.size() > 0;
	}
	
	/**
	 * returns the next token
	 * @return
	 */
	public String nextToken() {
		return this.tokens.remove(index);
	}
}