Behind the scenes of the planning DSL

The article explains how to write class for supporting DSL. Very much inspiring. Must read!!!

If you are curious what DSL is, have a look at Fluent Interface and Domain Specific Language (DSL). Basically, it can be summarized as using human readable/writable language instead of clumsy OOP stuff; for example,

Show.Window.Titled("Foo").With.Button("ok") 

instead of

Window w = new Window(); 
w.title("Foo"); 
Button b = new Button("ok"); 
w.add(b);