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It's a pretty daunting problem to try and solve generically. You might consider pairing a Visitor pattern, which allows you to add functionality to a graph of objects, with a Chain of Responsibility pattern, which allows you to break separate the responsibility for executing a task out into multiple objects and then dynamically route requests to the right handler. If you did this, you would be able to generate simple, specific differentiation logic on a per-type basis without having a single, massive class that handles all of your differentiation tasks. It would also be easy to add handlers to the tree. The best part is that you can still have a link in your Chain of Responsibility for "flat" objects (objects that are not collections and basically only have propeties), which is where reflection would help you the most anyway. If you "catch-all" case uses simple reflection-based comparison and your "special" cases handle things like lists, dictionaries, and sets, then you will have a flexible, maintainable, inexpensive solution. For more info: <ul> <li><a href="http://www.netobjectives.com/PatternRepository/index.php?title=TheChainOfResponsibilityPattern" rel="nofollow noreferrer">http://www.netobjectives.com/PatternRepository/index.php?title=TheChainOfResponsibilityPattern</a></li> <li><a href="http://www.netobjectives.com/PatternRepository/index.php?title=TheVisitorPattern" rel="nofollow noreferrer">http://www.netobjectives.com/PatternRepository/index.php?title=TheVisitorPattern</a></li> </ul>
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1. PODifferences between 2 objects with Java reflection : how?
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