[jboss-dev-forums] [Design the new POJO MicroContainer] - Re: MC tools

[flavia.rainone@jboss.com]

"alesj" wrote : I would also handle different metadata classes/values differently, more OO.
  | As it would be much easier to extend (and support) in the future.
  | 
  | Every excessive "if" usage usually indicates lack of OO. ;-)

This is the case when you can edit the types you're dealing with and add a method to them to do what you want to do. So, instead of doing:

 CommonSuperClass obj =...;
  | if (obj instance of A) { System.out.println("A blablabla"); }
  | else if (obj instance of B) { System.out.println("B bla bla bla");}

You change A and B classes to:

  | class A extends CommonSuperClass
  | {
  | ...
  | public String getMessage() { return "A blablabla";}
  | }
  | 
  | class B  extends CommonSuperClass
  | {
  | ...
  | public String getMessage() { return "B bla bla bla";}
  | }

And now you can do:
 CommonSuperClass obj = ...;
  | System.out.println(obj.getMessage());

But, of course, I can't change the meta data classes, adding a method that generates the XML form of each one of them. So, how can I get rid of my if instanceof statements and still generate proper XML for every meta data type?

I guess I missed what you're trying to tell me. So, please, elaborate :)

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