Booa8 Slide 12

Buliding Object-Oriented Applications in PowerBuilder Module 12 : Polymorphism

Objectives ,[object Object],[object Object],[object Object]

Topics ,[object Object],[object Object],[object Object]

Overview of Polymorphism ,[object Object],[object Object],[object Object],[object Object],[object Object]

Polymorphism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Categories of Polymorphism ,[object Object],[object Object],[object Object],[object Object]

Operational Polymorphism Example *Note: there is no ancestor with of_Save() or ue_retrieve of_Save( ) ue_Retrieve w_ar_main of_Save( ) ue_Retrieve w_inv_main of_Save( ) ue_Retrieve w_ap_main

Operational Polymorphism Static Messaging ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operational Polymorphism Dynamic Messaging Example ,[object Object],[object Object],[object Object],[object Object],[object Object]

Inclusional Polymorphism Example ,[object Object],[object Object],Methods defined in ancestor; descendants can optionally override or extend of_Save( ) ue_Retrieve w_ar_main ue_Retrieve w_inv_main of_Save( ) w_ap_main of_Save( ) ue_Retrieve {w_main}

Inclusional Polymorphism Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]

Lab Setup ,[object Object],[object Object]

Lab Debriefing ,[object Object]

Booa8 Slide 12

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Booa8 Slide 12