Article:		What Is Service-Oriented Architecture
Subject:		CD analogy
Date:		2004-12-20 08:26:22
From:		spamnomag
Response to: CD analogy
I must agree. In OO objects are responsible for their own state. That does not imply that for each instance of data you wish to process, you need a dedicated instance of an object to process it. If there is some extra data the player needs to play the CD (like track number, position of read head, etc) the player is responsible for maintaining that data and it should not be directly manipulated by external objects. The CD itself, which is the payload of a "play" message to the player, could be considered transient state for the player, and (typically) should not be manipulated by external objects while it is being played by the player. So in a sense OO says objects "encapsulate data" as apposed to the data being permanently bound to the object.

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• CD analogy
  2005-11-22 03:00:10 MuhammedShakir

• CD analogy
  2005-02-23 16:19:06 idol