PathIteratorからSVGを生成

private StringBuilder makeStarburstSvg(
      PathIterator pi, int sz, String style, String desc) {
  StringBuilder sb = new StringBuilder();
  sb.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
  // ...
  sb.append(String.format(
      "<svg width=\"%d\" height=\"%d\" xmlns=\"%s\">%n", sz, sz, w3));
  sb.append(String.format("  <desc>%s</desc>%n", desc));
  sb.append("  <path d=\"");
  double[] c = new double[6];
  while (!pi.isDone()) {
    switch (pi.currentSegment(c)) {
      case PathIterator.SEG_MOVETO:
        sb.append(String.format("M%.2f,%.2f ", c[0], c[1]));
        break;
      case PathIterator.SEG_LINETO:
        sb.append(String.format("L%.2f,%.2f ", c[0], c[1]));
        break;
      case PathIterator.SEG_QUADTO:
        sb.append(String.format("Q%.2f,%.2f,%.2f,%.2f ",
                                c[0], c[1], c[2], c[3]));
        break;
      case PathIterator.SEG_CUBICTO:
        sb.append(String.format("C%.2f,%.2f,%.2f,%.2f,%.2f,%.2f ",
                                c[0], c[1], c[2], c[3], c[4], c[5]));
        break;
      case PathIterator.SEG_CLOSE:
        sb.append("Z");
        break;
    }
    pi.next();
  }
  sb.append(String.format("\" style=\"%s\" />%n</svg>%n", style));
  return sb;
}