Reference Customized Application

The concept of the customized version is based on modified adaptor classes. Instead of containing the class Adaptation a adaptor holds references to all implementation classes of the implementation group. The method call for the implementation class is delegated to the right implementation class by traversing several if-then-else statements.

 

Figure: IConfiguration adaptor of the customized version  

Figure shows an example for a modified adaptor for the customized version. The class IMemory_Adaptor holds references to objects of all implementation classes, which implement the functionality interface IMemory. The method getPhysicalMemory is delegated to the right implementation class. The selection of the implementation class is hard coded in conditional branches. This scheme is applied to the other adaptors of the example, i.e. IHarddisk_Adaptor, IDefaultWebClient_Adaptor and IConfiguration_Adaptor. This modification of the prototype is used as the reference application for static customization, which is equivalent to the prototype as implemented according to the proposed methodology.

This design of the reference customized application is chosen, because it allows to reuse most parts of the adaptable version and keeps the effort for implementing a reference application low. A customized version developed from scratch would have a lower runtime, but it is considered to be sufficient in order to approximate the ratio between the runtime of an adaptable application and a customized version.