Groovy 2 Cookbook

Defining type-checking rules for dynamic code

The defining characteristic of Groovy is probably the dynamic nature of the language. Dynamic languages possess the capacity to extend a program at runtime, including changing types, behaviors, and object structures. With these languages, the things that static languages do at compile time can be done at runtime; we can even execute program statements that are created on the fly at runtime. Another trait of Groovy, typical of other dynamic languages such as Ruby or Python, is dynamic typing. With dynamic typing, the language automatically tests properties when expressions are being (dynamically) evaluated (that is, at runtime).

In this recipe, we will present how Groovy can be instructed to apply static ...