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POSet subclass of object when parent class is constructed (dynamic sub-classes)
 

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    <p>EDIT: To clear up some confusion, I am not actually using <code>Male</code> and <code>Female</code>. A better example would be parent-class <code>Animal</code> and sub-classes <code>Cat</code> and <code>Dog</code>.<br> I'm kind of new to OOP, but I've grasped it pretty well so far. However, there's one thing I can quite find a way of doing.<br> Firstly, I create a create a new object based around the user. The user can be be (for this example) male or female, but I cannot check if they are without checking in the database. I then need to create a new user object with the sub-class of their sex.<br> For example, here is my current (messy) code:</p> <pre><code>$user = new Person(); $userType = $user-&gt;GetUserType($userid); if ($userType == 'Male') { $user = new Male($userid); } else { $user = new Female($userid); } </code></pre> <p>If I want to make a new object, I must do this every time, which is something I don't want to have to do.<br> Here's a little more code to help put this into perspective:</p> <pre><code>class Person { function GetUserType($userid) { $db = mysqlConnect(); $stmt = $db-&gt;stmt_init(); // Get the players information $stmt-&gt;prepare("SELECT user_type FROM user_information WHERE user_id = ?"); $stmt-&gt;bind_param('i', $userid); $stmt-&gt;execute(); $stmt-&gt;bind_result($userType); $stmt-&gt;fetch(); $stmt-&gt;close(); $db-&gt;close(); return $userType; } } class Male extends Person { // Male based things here } class Female extends Person { // Female based things here } </code></pre> <p>So, in the <code>__construct</code> of the <code>Person</code> class, I'd like it to check for the users sex and set the appropriate sub-class.</p>
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    1. USJoseph Duffy
    1. USJoseph Duffy
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    1. COwhy do you want to have subclasses for Male and Female here? Is there different or additional behavior? Please explain the difference between those two classes.
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      1. USGordon
    2. COhttp://martinfowler.com/eaaCatalog/dataMapper.html
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    3. CO@Gordon Without explaining about the project I just chose an example to show that I'm looking for (a parent class that sets its own sub-class). My actual project does not use Male and Female, rather 2 other sub-classes. I have updated to give the example `Animal`, `Cat` and `Dog`.
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