Shift/Release Notes.txt at master · point85/Shift · GitHub

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						Work Schedule Project
						   RELEASE NOTES

(1)  1.1.4, February 6, 2024:
	- Upgraded hamcrest to 2.2
	- Removed unused Maven dependencies

(2)  1.2.0, December 15, 2024:
	- Added members for a team and exceptions for assigned personel

(3)  1.2.1, May 30, 2025:
	- Fix WorkSchedule.deleteShift() bug
	- Team.calculateWorkingTime() calls minusDays(1), remove member exception method, build cache synch
	- Rotation: invalidate cache
	- Use isZero() in NonWorkingPeriod.setDuration()
	- Shift Instance: use rquals()
	- TeamMemberException:  add equals() and hashcode() methods

(4)  1.2.2, February 14, 2026:
	- By Claude Sonnet 4.5
Bugs Fixed:
Named.java - Fixed equals/hashCode contract violation

Changed equals() to use Objects.equals() for proper null handling
Changed hashCode() to use Objects.hash() for consistency
Fixed toString() to handle null description gracefully
RotationSegment.java - Added null safety checks

Added defensive null checks before calling getName() on rotation and shift to prevent NullPointerException
ShiftInstance.java - Added null safety checks

Added defensive null checks in equals() method to prevent NullPointerException

Performance Improvements:
Team.java - Optimized cache synchronization

Replaced ConcurrentHashMap with HashMap since the method is already synchronized
Improved cache initialization logic to avoid unnecessary clear operations
Optimized string concatenation in toString() methods (replaced += with StringBuilder)