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Does Flex have Abstract class

Posted on 2010-11-20
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Last Modified: 2012-05-10
Does Flex have abstract class ?If so please can some one give an example
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Question by:randyraj
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4 Comments
 
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mawni earned 250 total points
ID: 34183059
as far as I know, Flex (Action Script) doesn't support abstract classes!
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by:tomaugerdotcom
tomaugerdotcom earned 250 total points
ID: 34220476
AS3 does not support abstract classes directly (ie: there is no "Abstract" directive).

However, an abstract class is essentially a class for whose methods you do not define an implementation. The best practice around abstract class creation can be summed up in this example:
package {
  public class MyAbstractClass implements IMyClass {
    public function MyAbstractClass() {

    }

    public function myPublicMethod():Object {
      throw new Error("Abstract Class: you must define an implementation for myPublicMethod");
      return new Object(); // so we don't get a compile-time error
    }

    private function myPrivateMethod():String {
       throw new Error("Abstract Class: you must define an implementation for myPrivateMethod");
       return ""; / to avoid compile-time exception
    }
  }
}

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Author Closing Comment

by:randyraj
ID: 34476156
Thanks
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by:tomaugerdotcom
ID: 34476291
I don't normally complain, but how is my answer a "C"? It's complete, it has a working code example and it addresses your question explicitly. What is your expectation of an "A" answer?
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