@SuppressWarnings("deprecation") private void autoWire( CompatibilityLevel level, InputPorts inputPorts, LinkedList<OutputPort> readyOutputs) throws PortException { boolean success = false; do { Set<InputPort> complete = new HashSet<InputPort>(); for (InputPort in : inputPorts.getAllPorts()) { success = false; if (!in.isConnected() && !complete.contains(in) && in.getPorts().getOwner().getOperator().shouldAutoConnect(in)) { Iterator<OutputPort> outIterator; // TODO: Simon: Does the same in both cases. Check again. if (in.simulatesStack()) { outIterator = readyOutputs.descendingIterator(); } else { outIterator = readyOutputs.descendingIterator(); } while (outIterator.hasNext()) { OutputPort outCandidate = outIterator.next(); // TODO: Remove shouldAutoConnect() in later versions Operator owner = outCandidate.getPorts().getOwner().getOperator(); if (owner.shouldAutoConnect(outCandidate)) { if (outCandidate.getMetaData() != null) { if (in.isInputCompatible(outCandidate.getMetaData(), level)) { readyOutputs.remove(outCandidate); outCandidate.connectTo(in); // we cannot continue with the remaining input ports // since connecting may have triggered the creation of new input ports // which would result in undefined behavior and a ConcurrentModificationException success = true; break; } } } } // no port found. complete.add(in); if (success) { break; } } } } while (success); }