* @throws PageEnvelopeException Page envelope can not operate properly.
* @throws AccessControlException If an access control violation occurs.
*/
public void triggerWorkflow(FOM_Cocoon cocoon, String event)
throws WorkflowException, PageEnvelopeException, AccessControlException {
final WorkflowDocument wf = (WorkflowDocument)WorkflowFactory.newInstance().buildInstance(getPageEnvelope(cocoon).getDocument());
wf.invoke(getSituation(cocoon), event);
}