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POQuestion about object-orientation
 

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    <p>I had this questions since the time I learnt about object-oriented programming. Now, I have got a wonderful forum I thought of asking this.</p> <p>Lets say we are implementing an employee management application using EJB.</p> <p>Now, there are 2 ways of doing this.</p> <ol> <li><p>Normally, we create entities (POJOs) which represent an employee. Then we create an EJB interface 'EmployeeManager' with add, delete, update, retrieve, retrieveAll methods. This way I could use 'employee' entity as a data transfer object.</p></li> <li><p>We call the EJB interface itself 'Employee'. Implementation could be called 'EmployeeImpl' which has <em>fields</em> as well as method implementation (add, delete, update, retrieve, retrieveAll). If I am using a layered approach where my business logic needs access to employee details, I need to pass 'EmployeeImpl' (because it contains values).</p></li> </ol> <p>Which one do you think is the better way?</p> <p>I prefer the first one, because it 'looks' fine and does not feel awkward. like</p> <pre><code>EmployeeMgr empMgr = // JNDI lookup; Employee emp = new Employee(); empMgr.add(emp); Employee employees[] = empMgr.retrieveAll(); </code></pre> <p>Where as the second one would look like (though I am not sure),</p> <pre><code>Employee emp = // JNDI lookup; emp.setName(); //set the properties emp.add(); Employee employees[] = emp.retrieveAll(); </code></pre> <p>As you can see, the second one looks awkward.</p> <p>I request you guys to advise me on this.</p> <p>Thanks manju</p>
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