Type safety through inheritance (2)

Type safety through inheritance (2)

References

Reference NO 1

http://stackoverflow.com/questions/15186267/type-safety-through-inheritance

Reference NO 2

http://stackoverflow.com/questions/2575438/use-inheritance-to-create-a-custom-type-safe-null-safe-collection

Reference NO 3

http://stackoverflow.com/questions/9806785/best-practice-for-enforcing-type-safety-in-polymorphic-inheritance-hierarchies

Reference NO 4

http://se.ethz.ch/~meyer/ongoing/covariance/recast.pdf

Reference NO 5

https://www4.in.tum.de/~nipkow/pubs/oopsla06.pdf

Reference NO 6

http://www.gotw.ca/gotw/060.htm

Reference NO 7

http://www.ics.uci.edu/~lopes/teaching/inf212W12/readings/wasserrab.pdf

Reference NO 8

http://docs.doctrine-project.org/en/2.0.x/reference/inheritance-mapping.html