Hi, I was looking at collection packages and I found that the class Association inherits from Magnitude.<div>It is really strange for me because inheritance represent a &quot;is-a&quot; relation.</div><div><br></div><div>So I looked that the documentation of each of these classes:</div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><div class="gmail_quote"><div><br></div><div><b>Association:</b>�I represent a pair of associated objects--a key and a value. My instances can serve as entries in a dictionary.</div>
<div><br></div><div><b>Magnitude:</b>�I&#39;m the abstract class Magnitude that provides common protocol for objects that have</div><div>the ability to be compared along a linear dimension, such as dates or times.</div><div>
Subclasses of Magnitude include Date, ArithmeticValue, and Time, as well as</div><div>Character and LookupKey.</div></div><div><br></div><div>Based on this, I think this relation is conceptually WRONG.</div><div><meta http-equiv="content-type" content="text/html; charset=utf-8">If the idea is to reuse code then composition should be used instead of inheritance.</div>
<div></div></span></div><div><br></div><div>What do you think?</div><div><br clear="all">Saludos!<br>Nico.<br>blog: <a href="http://nicopaez.wordpress.com">nicopaez.wordpress.com</a><br>
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