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I'm about to start a social web app project. While i was designing classes , i decided to define interfaces like "commentable" or "likeable" to use them when needed. Yet i couldn't figure it out how to implement it in Groovy, that i am in the learning phase. The Example below is from the Groovy documentation, interface X { void f(); void g(int n); void h(String s, int n); } x = [ f: {println "f called"} ] as X x.f() //x.g() // NPE here Say this is one of my interfaces , and I want to use a Class called B to implement this interface .. shall I just say B as X , in the related controller? How to do it in domain layer? If a class Z is, lets say "commentable" , shall i just make a domain class called Comment and say Z hasMany Comment? and use the interface in the controller layer? What is the Groovy way to do this correctly? I'm bit confused and a little clarification would be really nice. Thanks in advance
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