Exclusive Gateway

A decision point where exactly one of several outgoing paths is taken, based on a condition.

An exclusive gateway (drawn as a diamond with an X, or a plain diamond) routes a token down exactly one outgoing sequence flow — the first one whose condition evaluates true, or a default flow if none match.

This is the BPMN equivalent of an if/else statement. Conditions are FEEL expressions evaluated against the process's variables, e.g. `= approved` or `= amount > 1000`.

Example

Bpmn.createProcess("loan")
  .startEvent("start")
  .exclusiveGateway("gw", { name: "Approved?" })
  .branch("yes", (b) => b.condition("= approved").endEvent("end-ok"))
  .branch("no", (b) => b.defaultFlow().endEvent("end-rejected"))
  .withAutoLayout()
  .build();