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Command Base Class

After the underlying object (LSP123) is created, we need to be able to execute operations against it. To do this, I use a generic Command class, as illustrated in Listing 5.

Listing 5 Simple Command Class

class Command {
  virtual ~Command() {};
  virtual void Execute() {};
  Command() {};

As with the Connection base class, the Command class in Listing 5 can be extended to allow for complex commands or operations on a variety of objects. The Execute() method is a placeholder for such commands. Let’s now assume that we decided to delete the entity LSP123 from Figure 1. So, we need a command object that handles deletion.

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