How to use

getIgnoreCondition

method

in

org.apache.flink.cep.nfa.compiler.NFACompiler$NFAFactoryCompiler

proceedState,
takeCondition,
getIgnoreCondition(currentPattern),
currentPattern.getQuantifier().hasProperty(Quantifier.QuantifierProperty.OPTIONAL));

proceedState,
takeCondition,
getIgnoreCondition(currentPattern),
currentPattern.getQuantifier().hasProperty(Quantifier.QuantifierProperty.OPTIONAL));

proceedState,
takeCondition,
getIgnoreCondition(currentPattern),
currentPattern.getQuantifier().hasProperty(Quantifier.QuantifierProperty.OPTIONAL));

/**
 * Creates a simple single state. For an OPTIONAL state it also consists
 * of a similar state without the PROCEED edge, so that for each PROCEED transition branches
 * in computation state graph  can be created only once.
 *
 * @param sinkState state that the state being converted should point to
 * @return the created state
 */
@SuppressWarnings("unchecked")
private State<T> createSingletonState(final State<T> sinkState) {
  return createSingletonState(
    sinkState,
    sinkState,
    getTakeCondition(currentPattern),
    getIgnoreCondition(currentPattern),
    isPatternOptional(currentPattern));
}

/**
 * Creates a simple single state. For an OPTIONAL state it also consists
 * of a similar state without the PROCEED edge, so that for each PROCEED transition branches
 * in computation state graph  can be created only once.
 *
 * @param sinkState state that the state being converted should point to
 * @return the created state
 */
@SuppressWarnings("unchecked")
private State<T> createSingletonState(final State<T> sinkState) {
  return createSingletonState(
    sinkState,
    getIgnoreCondition(currentPattern),
    currentPattern.getQuantifier().hasProperty(Quantifier.QuantifierProperty.OPTIONAL));
}

/**
 * Patterns with quantifiers AT_LEAST_ONE_* are created as a pair of states: a singleton state and
 * looping state. This method creates the first of the two.
 *
 * @param sinkState the state the newly created state should point to, it should be a looping state
 * @return the newly created state
 */
@SuppressWarnings("unchecked")
private State<T> createInitMandatoryStateOfOneOrMore(final State<T> sinkState) {
  final IterativeCondition<T> currentCondition = (IterativeCondition<T>) currentPattern.getCondition();
  final State<T> firstState = createState(currentPattern.getName(), State.StateType.Normal);
  firstState.addTake(sinkState, currentCondition);
  final IterativeCondition<T> ignoreCondition = getIgnoreCondition(currentPattern);
  if (ignoreCondition != null) {
    firstState.addIgnore(ignoreCondition);
  }
  return firstState;
}

/**
 * Creates a simple single state. For an OPTIONAL state it also consists
 * of a similar state without the PROCEED edge, so that for each PROCEED transition branches
 * in computation state graph  can be created only once.
 *
 * @param sinkState state that the state being converted should point to
 * @return the created state
 */
@SuppressWarnings("unchecked")
private State<T> createSingletonState(final State<T> sinkState) {
  return createSingletonState(
    sinkState,
    sinkState,
    getTakeCondition(currentPattern),
    getIgnoreCondition(currentPattern),
    isPatternOptional(currentPattern));
}

/**
 * Creates a simple single state. For an OPTIONAL state it also consists
 * of a similar state without the PROCEED edge, so that for each PROCEED transition branches
 * in computation state graph  can be created only once.
 *
 * @param sinkState state that the state being converted should point to
 * @return the created state
 */
@SuppressWarnings("unchecked")
private State<T> createSingletonState(final State<T> sinkState) {
  return createSingletonState(
    sinkState,
    sinkState,
    getTakeCondition(currentPattern),
    getIgnoreCondition(currentPattern),
    isPatternOptional(currentPattern));
}

/**
 * Creates a pair of states that enables relaxed strictness before a zeroOrMore looping state.
 *
 * @param loopingState the first state of zeroOrMore complex state
 * @param lastSink     the state that the looping one points to
 * @return the newly created state
 */
@SuppressWarnings("unchecked")
private State<T> createInitOptionalStateOfZeroOrMore(final State<T> loopingState, final State<T> lastSink) {
  final IterativeCondition<T> currentCondition = (IterativeCondition<T>) currentPattern.getCondition();
  final State<T> firstState = createState(currentPattern.getName(), State.StateType.Normal);
  firstState.addProceed(lastSink, BooleanConditions.<T>trueFunction());
  firstState.addTake(loopingState, currentCondition);
  final IterativeCondition<T> ignoreFunction = getIgnoreCondition(currentPattern);
  if (ignoreFunction != null) {
    final State<T> firstStateWithoutProceed = createState(currentPattern.getName(), State.StateType.Normal);
    firstState.addIgnore(firstStateWithoutProceed, ignoreFunction);
    firstStateWithoutProceed.addIgnore(ignoreFunction);
    firstStateWithoutProceed.addTake(loopingState, currentCondition);
    addStopStates(firstStateWithoutProceed);
  }
  return firstState;
}

final IterativeCondition<T> ignoreCondition = getIgnoreCondition(currentPattern);