void perform( MultiStatus status, EngineSession session, Operand[] operands, IProgressMonitor monitor) { SubMonitor subMonitor = SubMonitor.convert(monitor, prePerformWork + mainPerformWork + postPerformWork); session.recordPhaseEnter(this); prePerform(status, session, subMonitor.newChild(prePerformWork)); if (status.matches(IStatus.ERROR | IStatus.CANCEL)) return; session.recordPhaseStart(this); subMonitor.setWorkRemaining(mainPerformWork + postPerformWork); mainPerform(status, session, operands, subMonitor.newChild(mainPerformWork)); if (status.matches(IStatus.ERROR | IStatus.CANCEL)) return; session.recordPhaseEnd(this); subMonitor.setWorkRemaining(postPerformWork); postPerform(status, session, subMonitor.newChild(postPerformWork)); phaseParameters.clear(); if (status.matches(IStatus.ERROR | IStatus.CANCEL)) return; session.recordPhaseExit(this); subMonitor.done(); }