How to decide to which class does a method belong

Posted by Eleeist on Programmers See other posts from Programmers or by Eleeist
Published on 2013-10-18T16:00:17Z Indexed on 2013/10/18 16:11 UTC
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design

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object-oriented

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object-oriented-design

I have TopicBusiness.class and PostBusiness.class. I have no problem with deciding into which class methods such as addPostToDatabase() or getAllPostsFromDatabase() should go. But what about getAllPostsFromTopic(TopicEntity topic) or getNumberOfPostsInTopic(TopicEntity topic)?

Should the parameter be the deciding factor? So when the method takes TopicEntity as parameter it should belong to TopicBusiness.class? I am quite puzzled by this.

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