Now the generation of ULID in string format is 2.5x faster than before.
List of changes:
Optimize UlidSpecCreator
Optimize UlidConverter
Optimize UlidValidator
Create UlidStruct // class for internal use and test cases
Add test cases
Update README.md
Update javadoc
Coverage 94.3%
Remove UlidCreatorException // extremely unlikely to occur overrun
Add UlidCreator.toString() // from UUID to crockford base 32
Change DefaultRandomStrategy // no need for thread local SecureRandom
Update test cases
Update README.md
Update javadoc
Test coverage: 94.2%
Rename UlidBasedGuidCreator to UlidSpecCreator
Add method UlidCreator.fromString()
Add RandomStrategy for UlidSpecCreator
Add DefaultRandomStrategy using thread local SecureRandom
Add OtherRandomStrategy for any instance of Random
Add tests cases
Optimize UlidConverter.fromString()
Optimize UlidConverter.toString()
Optimize UlidValidator.isValid()
Optimize UlidSpecCreator
Update README.md
Update tests cases