Tutorials : Developing UML Diagrams for EJBs with Poseidon :

Creating a UML Diagram with Poseidon for UML

You'll be creating Analysis, External, and Internal View Detail UML diagrams, all of which are class diagrams. You construct a class diagram by selecting Create Diagram—>Class Diagram. Figure 1 shows a class diagram being added to the Poseidon interface.

Figure 1. Creating a Class Diagram.

To add a new class to the class diagram, select the Creates a New Class icon.

When you add a new class to the class diagram, a node for the class diagram is also added. Class modifiers like Stereotype, classes extended, and interfaces implemented can be set in the Properties frame.

Figure 2. Creating a Class.

To add a new attribute to a class select the attribute icon. Class attributes correspond tofields within an EJB.

Next, you'll add an attribute to the class and a node for that attribute will also be added automatically (see Figure 3). As before, you can set attribute modifiers like type, initial value, and stereotype from the Properties frame.

Figure 3. Adding an Attribute Node.

To add a class operation, select the Operation icon in the class. A class operation corresponds to a method in your EJB (see Figure 4).

Figure 4. Adding an Class Operation.

Adding a class operation to the class begets a node for the operation. Set the method modifiers (stereotype, return type, and parameters) from the Properties frame.

To add an interface to the class diagram, select the Interface icon. Set its stereotype and interfaces extended modifiers from the Properties frame.

Select the Dependency icon to add a Dependency to the class diagram as shown in Figure 5. A Dependency defines an association between classes and interfaces. Now, add Dependency to the class diagram.

Figure 5. Adding a Dependency.

Now that you know how to create a UML class diagram, you can create UML diagrams for an example EJB. The example EJB is discussed in the next section.

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