Implementing Search in object oriented design

Hi experts

Could you provide me with some best pratice examples of how to implement a site search for a website. I am interested in how to design my objects and classes in regards to the search.

Is it better to create a search object, which handels all searches or add a search interface to all searchable objects?

Many thanks
riffrackAsked:
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ambienceCommented:
Search is closely related to the data and access patterns. One pattern that comes to mind that allows for flexible searches is the Specification pattern. As a start check out http://www.codeproject.com/Articles/670115/Specification-pattern-in-Csharp

If you are using the repository pattern then adding a new method for new kind of searches. This makes sense if for example you dont require a great deal of flexibility in search types.
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