public function __construct(ProcessModel $model, Node $startNode = NULL, array $variables = [])
{
$this->model = $model;
$this->variables = $variables;
if ($startNode === NULL) {
$initial = $model->findInitialNodes();
if (count($initial) != 1) {
throw new \RuntimeException(sprintf('Process "%s" does not declare exactly 1 start node', $model->getTitle()));
}
$this->startNode = array_shift($initial);
} else {
$this->startNode = $startNode;
}
}
/**
* Take a transition from the given node.
*
* @param string $transition ID of the transition, ommitting it will assume a single outgoing transition.
*
* @throws \RuntimeException When the execution has been terminated.
*/
public function take($transition = NULL)
{
if ($this->isTerminated()) {
throw new \RuntimeException(sprintf('Cannot take transition in terminated %s', $this));
}
if ($transition !== NULL && !$transition instanceof Transition) {
$transition = $this->model->findTransition($transition);
}
$this->engine->pushCommand($this->engine->createTakeTransitionCommand($this, $transition));
}
protected function findSubProcessStartNode($id, ProcessModel $subModel)
{
$startNode = NULL;
foreach ($subModel->findStartNodes() as $candidate) {
$behavior = $candidate->getBehavior();
if ($behavior instanceof StartEventBehaviorInterface) {
$startNode = $candidate;
break;
}
}
if ($startNode === NULL) {
throw new \RuntimeException(sprintf('Missing start node of sub process %s', $id));
}
return $startNode;
}
