How to use

getPreviousState

method

in

org.apache.flink.cep.nfa.ComputationState

if (computationState.getPreviousState() == null) {
  return new HashMap<>();
        computationState.getPreviousState().getName()),
    computationState.getEvent(),
    computationState.getTimestamp(),

  NFAStateNameHandler.getOriginalNameFromInternal(computationState.getPreviousState().getName()),
  computationState.getEvent(),
  computationState.getTimestamp(),
        newComputationState.getPreviousState().getName()),
    newComputationState.getEvent(),
    newComputationState.getTimestamp(),
eventSharedBuffer.release(
    NFAStateNameHandler.getOriginalNameFromInternal(
        newComputationState.getPreviousState().getName()),
    newComputationState.getEvent(),
    newComputationState.getTimestamp(),
eventSharedBuffer.release(
    NFAStateNameHandler.getOriginalNameFromInternal(
        state.getPreviousState().getName()),
    state.getEvent(),
    state.getTimestamp(),

@Override
public void serialize(NFA<T> record, DataOutputView target) throws IOException {
  serializeStates(record.states, target);
  target.writeLong(record.windowTime);
  target.writeBoolean(record.handleTimeout);
  sharedBufferSerializer.serialize(record.eventSharedBuffer, target);
  target.writeInt(record.computationStates.size());
  StringSerializer stateNameSerializer = StringSerializer.INSTANCE;
  LongSerializer timestampSerializer = LongSerializer.INSTANCE;
  DeweyNumber.DeweyNumberSerializer versionSerializer = new DeweyNumber.DeweyNumberSerializer();
  for (ComputationState<T> computationState: record.computationStates) {
    stateNameSerializer.serialize(computationState.getState().getName(), target);
    stateNameSerializer.serialize(computationState.getPreviousState() == null
        ? null : computationState.getPreviousState().getName(), target);
    timestampSerializer.serialize(computationState.getTimestamp(), target);
    versionSerializer.serialize(computationState.getVersion(), target);
    timestampSerializer.serialize(computationState.getStartTimestamp(), target);
    target.writeInt(computationState.getCounter());
    if (computationState.getEvent() == null) {
      target.writeBoolean(false);
    } else {
      target.writeBoolean(true);
      eventSerializer.serialize(computationState.getEvent(), target);
    }
  }
}

      resultingComputationStates,
      edge.getTargetState(),
      computationState.getPreviousState(),
      computationState.getEvent(),
      computationState.getCounter(),
final State<T> nextState = edge.getTargetState();
final State<T> currentState = edge.getSourceState();
final State<T> previousState = computationState.getPreviousState();
    computationState.getPreviousState().getName()),
computationState.getEvent(),
computationState.getTimestamp(),