Programming Groovy 2

17.6 Using FactoryBuilderSupport

We’ll use ​FactoryBuilderSupport​ if we’re working with well-defined node names such as button, checkbox, label, and so on, in the ​SwingBuilder​. The ​BuilderSupport​ we saw in Section 17.5, ​Using BuilderSupport​, is good for working with hierarchical structures. However, it’s not convenient for dealing with different types of nodes. Suppose we have to work with twenty different node types. Our implementation of ​createNode​ will get complicated. Based on the node name, we’ll create different nodes, which leads to a messy ​switch​ statement. Chances are we’ll quickly lean toward an abstract factory (see Design Patterns: Elements of Reusable Object-Oriented Software [GHJV95]) approach to create these nodes. ...