Hi, I was looking at collection packages and I found that the class Association inherits from Magnitude. It is really strange for me because inheritance represent a "is-a" relation.
So I looked that the documentation of each of these classes: *Association:* I represent a pair of associated objects--a key and a value. My instances can serve as entries in a dictionary. *Magnitude:* I'm the abstract class Magnitude that provides common protocol for objects that have the ability to be compared along a linear dimension, such as dates or times. Subclasses of Magnitude include Date, ArithmeticValue, and Time, as well as Character and LookupKey. Based on this, I think this relation is conceptually WRONG. If the idea is to reuse code then composition should be used instead of inheritance. What do you think? Saludos! Nico. blog: nicopaez.wordpress.com
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