An important and powerful part of Groovy is its implementation of the Builder pattern. This pattern was made famous by the seminal work Design Patterns: Elements of Reusable Object-Oriented Software; Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides.
With builders, data can be defined in a semi-declarative way. Builders are appropriate for the generation of XML, definition of UI components, and anything that is involved with simplifying the construction of object graphs. Consider:
Teacher t = new Teacher('Steve') Student s1 = new Student('John') Student s2 = new Student('Richard') t.addStudent(s1) t.addStudent(s2)
There are a few issues with the previous code; verbosity and the lack of a hierarchical ...