How to use

isPatternOptional

method

in

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

/**
 * 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 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));
}