Design Patterns Explained: A New Perspective on Object-Oriented Design

Comparison with the Previous Solution

Compare this new solution, shown in Figure 12-11, with the earlier solution, which is shown again in Figure 12-12.

Figure 12-12. This was the first solution.

Another way to compare two solutions is to read them. In other words, the diagrams visually show inheritance (the is-a relationship) and composition (the has-a relationship). Read these diagrams using those words where the relationships are present.

In the original solution, I had a model that contains Features. Features are either slot features, hole features, cutout features, irregular features, or special features. Slot features are either V1 slots ...