| 摘要 |
The invention relates to an object-oriented technique for flexibly storing and representing hierarchical application data that avoids the re-engineering of existing application classes and the maintenance-critical massive code duplication, mainly in the presence of limitations given by the employed object-oriented language. In a first step classes are provided including a hierarchy base class with methods for accessing hierarchical relationships, at least one hierarchy subclass that is derived from the hierarchy base class, and at least one application class. In a next step objects are instantiated including at least one hierarchy object of the at least one hierarchy subclass and at least one application object of the at least one application class. In a final step, each application object is linked to at least one hierarchy object, and vice versa, such that the hierarchically related application objects have access to each other via the methods provided by the hierarchy base class. The invention may be practiced in a path optimization context.
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