Programming Groovy 2

19.1 Context

Context is one of the characteristics of a DSL. As humans, we rely heavily on context when we communicate. We’re efficient, and context provides for continuity in our conversations. The other day I heard my friend Neal holler, “Venti latte with two extra shots!” He was using the Starbucks DSL. Nowhere did he mention the word “coffee,” but he sure got one, at a high price. That’s context-driven.

Let’s look at Java code to order pizza. This code lacks context. The reference ​joesPizza​ is used repeatedly:

//Java code
package com.agiledeveloper;

public class OrderPizza {
  public static void main(String[] args) {
    PizzaShop joesPizza = new PizzaShop();
 joesPizza.setSize(Size.LARGE); ...