package com.jclark.xsl.conv;

class DecimalNumberFormat implements NumberFormat {
  private char digitZero;
  private int minDigits;

  DecimalNumberFormat(char digitZero, int minDigits) {
    this.digitZero = digitZero;
    this.minDigits = minDigits;
  }

  public String format(int n) {
    String s = Integer.toString(n);
    if (digitZero == '0' && s.length() >= minDigits)
      return s;
    StringBuffer buf = new StringBuffer();
    if (s.length() < minDigits) {
      int i = minDigits - s.length();
      while (i-- != 0)
	buf.append(digitZero);
    }
    for (int i = 0; i < s.length(); i++)
      buf.append((char)(digitZero + (s.charAt(i) - '0')));
    return buf.toString();
  }
}