July 2001
Intermediate to advanced
656 pages
15h 51m
English
book
Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
by Craig Larman
Content preview from Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and the Unified Process, Second Edition
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33.6. Abstract Factory (GoF) for Families of Related Objects
The JavaPOS implementations will be purchased from manufacturers. For example[5]:
[5] These are fictitious package names.
// IBM's drivers com.ibm.pos.jpos.CashDrawer (implements jpos.CashDrawer) com.ibm.pos.jpos.CoinDispenser (implements jpos.CoinDispenser) ... // NCR's drivers com.ncr.posdrivers.CashDrawer (implements jpos.CashDrawer) com.ncr.posdrivers.CoinDispenser (implements jpos.CoinDispenser) ...
Now, how to design the NextGen POS application to use the IBM Java drivers if IBM hardware is used, NCR drivers if appropriate, and so forth?
Note that there are families of classes (CashDrawer+CoinDispenser+...) that need to be created, and each family implements the same interfaces. ...
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