增强Enhancement Framework for Classes.docx
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2015-12-29
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class 的增强 Enhancement
Framework For Classes
Enhancement Framework For Classes
Keywords
Enhancements, Class Enhancements
Introduction:
This Enhancement framework provides exibility to scale up the existing classes to
achieve the expected business functionality. It gives us the advantage of enhancing the
global parameters and interface of a class.
Enhancement Features:
1. Adding new methods
2. Adding new parameters
3. Enhancing the existing business functionality
Enhancing Existing Functionality:
1. Pre-exit method
2. Post-exit method
3. Overwrite-exit method
Pre-exit method:
Pre-exit methods are enhancement points invoked at runtime. This method is
executed or triggered before the original method. In general, it is majorly used for
validation check before the execution of the logic in the original method. In some cases
we may also use this method to get the data to be passed on to the original method.
Post-exit method:
Post-exit methods are enhancement points invoked at runtime. This method is
executed or triggered after the original method. This method can be used to implement
the custom logic based on the parameters passed from the original method.
Overwrite-exit method:
Overwrite-exit methods are enhancement methods identi)ed for replacement at
runtime for the original method. In short an overwrite exit method is an enhancement
section and the pre-post exit methods are enhancement points.
Step wise approach to implement enhancement:
In our scenario, let us consider enhancing a copy of standard class
“CL_BSP_FLIGHT_DEMO”.
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