问题
I have a super class, that 40 other clases inherit, at this point I would like to simplify the diagram, to be exact all the inheritance relations (40 relations point to a single class) all these "arrows" just make the diagram a complete mess, Is it posible to simplify this?
回答1:
There is no direct way to simplify such case in UML Specs, but really 40 classes to inherit from one class? I think you may need to re-consider your design again.
In general, you can omit attributes and methods from classes, that way is better at least.
回答2:
Are you using inheritance for code re-use? I have never encountered a scenario where there are 40 subclasses. Anyways, one idea is to group the logically related classes into 1 single package diagram and then have package relations.
I would like to offer few suggestions though
- UML diagrams are 90's ;-). In the current world of agile, I see little use of those diagrams
- Look into tools that can reverse engineer your code and create class and sequence diagrams when needed. This helps you to VISUALIZE only the relevant parts of an application ON-DEMAND
- Read about sub-typing versus sub-classing
回答3:
This is a good question because I had a similar problem in one of my projects. What I have done is to reduce the size of the each class in order just to have the name displayed. I have then selected a circular + hierarchical layouts and moved with my mouse all these links.
The result was brilliant. The tool I used was EclipseUML Omondo.
回答4:
I would suggest the following:
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- SCENARIO 1
**
If you do not plan on using the model for code generation:
- Place all the subclasses into a package. Give this package a name to indicate that all it's contained elements / classes inherits from the specific super class. For instance, if the super class is named "SuperFoo", I would call the package "SuperFoo_SubTypes"
- Place a note in the package to indicate that all the classes in the package inherits from the super class.
**
- SCENARIO 2
**
You do indeed plan to generate code from your model:
Option 1 I would perhaps suggest that you draw all the inheritance associations as per normal, and then hide the super class using the hide functionality on your modelling tool.
Option 2 Use the alternative notation for describing inheritance/generalization by, for each of the subclasses, writing out the name of the superclass in italic font and in the top right-hand corners of the subclass elements. This method is briefly explained in this article: http://www.sparxsystems.com/resources/uml2_tutorial/uml2_classdiagram.html This will of course depend on whether your modelling tool supports this notation.
I hope this helps!
来源：https://stackoverflow.com/questions/4286949/how-can-i-simplify-an-uml-class-diagram-inheritance-notation