If the condition is true then, update operation will be perform on account object. In the above example alt operator is used to show condition as amount >=balance. This sub region is executed if none of the other guard conditions are true. One sub region may have the special guard condition.At most one sub region may be executed. Generally speaking, a sequence diagram does not handle conditionals because the different outcomes of the conditional are two different sequences, and can be modeled as such.If the guard condition for a sub region is true, then that sub region is executed. Each sub region represents one branch of a condition.Sequence Diagram Generator System from Use case. In an UML state diagram, an if-condition should be modeled as a choice element, represented by a diamond-shaped symbol. Open this template and add content to customize this sequence diagram to your use case. You can also use combined fragments for more complicated conditional logic. Here's a picture with an example: Notice the ' pastDueBalance 0' condition. A guard is a boolean expression that you can write over a transition. Identify opportunities for optimization. 3 Answers Sorted by: 19 As in many types of UML diagrams, you can use guards to denote a condition. See how objects and components interact to complete a process. When that objects lifeline ends, you can place an X at the end of its lifeline to denote a destruction occurrence.Ī repetition or loop within a sequence diagram is depicted as a rectangle. This sequence diagram template can help you: - Model the logic for a sophisticated procedure, function, or operation. The body of the control operator is divided into multiple sub regions by horizontal dashed lines. Place the condition for exiting the loop at the bottom left corner in square brackets.
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