Mapping of UML Elements to Source Code

The assumption is that the input model conforms to UML 2.0 standard. The PIM usually contains only interfaces containing properties and operations and an associated protocol state machine, however in most cases it will contain classes consisting of properties, operations and associated behavioral state machines.

The following tables how the mapping of some UML 2.0 elements to the target language, which is Java in this particular case (see table and ). The mapping has been implemented by the transformation JETs file and the code generator helper class.

The mapping of the UML 2.0 interface elements to Java elements is summarized in the following table.

UML2 model element	Java
`Package`	`Folder`
`Interface`	`Interface (.java file)`
`Generalization relationship`	`Interface inheritance`
`Interface property`	`Setter, getter operation`
`Interface operation`	`Operation`
`Parameter`	`Operation argument`
`Return parameter`	`Operation return type`
`Template parameter`	`Parameter for parametrization of operations`
`Protocol State Machine`	`No equivalent representation`
`Call Trigger`	`No equivalent representation`
`Region`	`No equivalent representation`
`State`	`No equivalent representation`
`Pseudostate (Initial state)`	`No equivalent representation`
`Transition`	`No equivalent representation`

The mapping of the UML 2.0 class elements to Java elements is summarized in the following table.

UML2 model element	Java
`Package`	`Folder`
`Class`	`Class (.java file)`
`Generalization relationship`	`Class or interface inheritance`
`Association relationship`	`Class attribute`
`Class property`	`Class attribute`
`Class operation`	`Operation`
`Parameter`	`Operation argument`
`Return parameter`	`Operation return type`
`State Machine`	`No equivalent representation`
`Call Trigger`	`Trigger operation`
`Region`	`No equivalent representation`
`State`	`Instance of the State class (see the hierarchical state machine concept)`
`Pseudostate (Initial state)`	`Marking a particular state as an initial state (see the hierarchical state machine concept)`
`Transition (triggered)`	`Operation`

The Model-to-Code Transformation Project

Mapping of UML Elements to Source Code