Professional PHP Design Patterns

6.2. UML

This Unified Modified Language (UML) diagram details a class design using the Decorator Design Pattern (see Figure 6-1).

Figure 6-1. Figure 6-1

Note the following about this figure:

• The MyObject is the base class with the existing functionality. It contains a public array named items and a public method named showItemsFormatted().

• showItemsFormatted() is responsible for taking the items array, formatting them using predefined functionality, and presenting output.

• The MyObjectDecorator class contains a private instance of MyObject and two public methods, named MyObjectDecorator() and decorateItems().

• The MyObjectDecorator() method represents the constructor. It takes a parameter of type MyObject and stores it internally.

• The decorateItems() method modifies the items array of the MyObject instance.