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2.9 Finishing the methods to delegate to the other WordLibrary

Juppies 2 by Dr Heinz M. Kabutz

We won't shuffle the array yet - that is coming soon. In this section we will complete the rest of the methods of our ShuffledWordLibrary. Our getWord() now gets the new index from the array and then returns other.getWord(newIdx). We do something similar for getScrambledWord().

What we are doing in our ScambledWordDictionary is delegating the work of providing words to the other WordLibrary. This is a good way of structuring our system - get other classes to do the work. We call this the Single Responsibility Principle (SRP) - every class has exactly one purpose. The StaticWordLibrary gives back scrambled words. The ShuffledWordLibrary shuffles the words, etc.


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