How to draw multiple returns in UML sequence diagram
sequence-diagram, uml
Solution
The problem is with your tool, not with UML. Check out visual paradigm for UML. You can manually add activations at the start of each `alt` fragment and at the end of the activation send the return message.
Problem
In UML sequence diagram a method can have only one return line (at least in Astah I'm unable to draw two return lines from one method), how can I model multiple returns in if-else blocks? In below example, return line 'a' ends methodX(), how to draw return line 'b'? ``` String methodX(int i) { if (i>0) return 'a'; else return 'b'; } +------------+ +------------+ | Foo | | Bar | +-----+------+ +------+-----+ | | | methodX(i) | +-+----------------------->+-+ | | | | +-----+------------------------------------+ | alt | | | [i>0] | | | +-----+ | | a | | | | | |<- - - - - - - - - - - -+-+ | | | | | | | | | | | +------------------------------------------+ | | | [else] | | | | | | | | | | b | | | | |<- - - - - - - - - - - - | ?? | | | | | | | | | | | +------------------------------------------+ | | | +-+ | + + ```