When you add a parameter to a pattern in the Pattern Authoring view, a parameter class with two expansion methods is added to the pattern implementation model.
Expansion methods and the optional update methods are known as hot spots. You add Java™ code to the hot spots to dictate the pattern behavior when an argument value is added to or removed from a parameter. The following methods show the expansion methods:


To assist you with your code design, refer to the resources available in the pattern online help for the pattern framework and other references. To open the references, click , expand either API reference or Extention Points Reference and then click one of the Patterns topics.
To add expansion code:
Parent topic: Supplying implementation code for patterns
Related concepts
Pattern code and support files
Pattern expansion
Related tasks
Defining update methods
Regenerating source code
Regenerating pattern definitions