Clean Code

Listing B-5 (continued)
SpreadsheetDate.java

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388
Appendix B: 
org.jfree.date.SerialDate
374 * specified range (INCLUSIVE). The date order of d1 and d2 is not
375 * important.
376 *
377 * @param d1 a boundary date for the range.
378 * @param d2 the other boundary date for the range.
379 *
380 * @return A boolean.
381 */
382 public boolean isInRange(final SerialDate d1, final SerialDate d2) {
383 return isInRange(d1, d2, SerialDate.INCLUDE_BOTH);
384 }
385 
386 /**
387 * Returns true if this SerialDate is within the specified range (caller
388 * specifies whether or not the end-points are included). The order of d1
389 * and d2 is not important.
390 *
391 * @param d1 one boundary date for the range.
392 * @param d2 a second boundary date for the range.
393 * @param include a code that controls whether or not the start and end
394 * dates are included in the range.
395 *
396 * @return true if this SerialDate is within the specified
397 * range.
398 */
399 public boolean isInRange(final SerialDate d1, final SerialDate d2,
400 final int include) {
401 final int s1 = d1.toSerial();
402 final int s2 = d2.toSerial();
403 final int start = Math.min(s1, s2);
404 final int end = Math.max(s1, s2);
405 
406 final int s = toSerial();
407 if (include == SerialDate.INCLUDE_BOTH) {
408 return (s >= start && s <= end);
409 }
410 else if (include == SerialDate.INCLUDE_FIRST) {
411 return (s >= start && s < end);
412 }
413 else if (include == SerialDate.INCLUDE_SECOND) {
414 return (s > start && s <= end);
415 }
416 else {
417 return (s > start && s < end);
418 }
419 }
420 
421 /**
422 * Calculate the serial number from the day, month and year.
423 *
424 * 1-Jan-1900 = 2.
425 *
426 * @param d the day.
427 * @param m the month.
428 * @param y the year.
429 *
430 * @return the serial number from the day, month and year.
431 */
432 private int calcSerial(final int d, final int m, final int y) {
433 final int yy = ((y - 1900) * 365) + SerialDate.leapYearCount(y - 1);
434 int mm = SerialDate.AGGREGATE_DAYS_TO_END_OF_PRECEDING_MONTH[m];
435 if (m > MonthConstants.FEBRUARY) {