Scala: Derive correct child class from abstract parent class parameters

Scala: Derive correct child class from abstract parent class parameters

References

Reference NO 1

http://stackoverflow.com/questions/15191579/scala-derive-correct-child-class-from-abstract-parent-class-parameters

Reference NO 2

http://stackoverflow.com/questions/12705309/scala-case-class-inheritance

Reference NO 3

http://ofps.oreilly.com/titles/9780596155957/AdvancedObjectOrientedProgramming.html

Reference NO 4

http://www.ibm.com/developerworks/java/library/j-scala05298/index.html

Reference NO 5

http://docs.scala-lang.org/glossary/

Reference NO 6

http://programmers.stackexchange.com/questions/184783/can-objective-c-categories-serve-the-same-purpose-as-traits-do-in-scala

Reference NO 7

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Reference NO 8

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