private int findPlaceholderEndIndex(CharSequence buf, int startIndex) { int index = startIndex + this.placeholderPrefix.length(); int withinNestedPlaceholder = 0; while (index < buf.length()) { if (StringUtils.substringMatch(buf, index, this.placeholderSuffix)) { if (withinNestedPlaceholder > 0) { withinNestedPlaceholder--; index = index + this.placeholderSuffix.length(); } else { return index; } } else if (StringUtils.substringMatch(buf, index, this.simplePrefix)) { withinNestedPlaceholder++; index = index + this.simplePrefix.length(); } else { index++; } } return -1; }