Best practice for near reuse of model components?

Posted by Chris Knight on Stack Overflow See other posts from Stack Overflow or by Chris Knight
Published on 2010-04-30T11:31:53Z Indexed on 2010/04/30 11:37 UTC
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best-practices

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object-oriented-design

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language-agnostic

I have a requirement to use a Fund model in my code. It will contain a fund name and fund code. In the interest of reuse I've poked around the package containing the other models used and found an existing Fund model. However the issue here is that, in addition to fund name and code, it also contains an amount. Amount isn't directly relevant in my context. So, do I:

1) Use the existing Fund model as is, ignoring the setters/getters for fund amount.

2) Put a FundDescription interface onto the existing Fund model for accessing only the information I'm interested in.

3) Make a FundDescription base class from which the existing Fund model could now extend

4) Create a whole new seperate model since the two are slightly contextually different

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