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How to Implement decorator for an ArrayList to make it immutable without using the built in decorator
Posted 28-Apr-13 10:51am

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Solution 1

Do you really understand what you are asking about? I doubt, because if you did, you would not ask such question, because this is way too simple. You can create a wrapper class which is initialized with some instance of the ArrayList and exposes only the read-only access to the elements. I would suggest that, except the constructor I described above, the wrapper exposed only two properties: get element Count and the object by index. However, on top of it, you could implement million of things: cloning, search, and a lot more…

Please see also: http://en.wikipedia.org/wiki/Decorator_pattern[^].

—SA
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Comments
saga.chan at 28-Apr-13 16:47pm
   
Thanks Sergey
I am new to design patterns... was having difficulty to implement this.

Thanks again.
Sergey Alexandrovich Kryukov at 28-Apr-13 19:41pm
   
You are welcome.
Good luck, call again.
—SA

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