Package com.espertech.esper.common.internal.epl.pattern.guard

Interface Guard

All Known Implementing Classes:
ExpressionGuard, TimerWithinGuard, TimerWithinOrMaxCountGuard
public interface Guard
Guard instances inspect a matched events and makes a determination on whether to let it pass or not.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    accept(EventGuardVisitor visitor)
     
    boolean
    inspect(MatchedEventMap matchEvent)
    Returns true if inspection shows that the match events can pass, or false to not pass.
    void
    startGuard()
    Start the guard operation.
    void
    stopGuard()
    Called when sub-expression quits, or when the pattern stopped.

  • Method Details

    • startGuard

      void startGuard()
      Start the guard operation.

    • stopGuard

      void stopGuard()
      Called when sub-expression quits, or when the pattern stopped.

    • inspect

      boolean inspect(MatchedEventMap matchEvent)
      Returns true if inspection shows that the match events can pass, or false to not pass.
      Parameters:
      matchEvent - is the map of matching events
      Returns:
      true to pass, false to not pass

    • accept

      void accept(EventGuardVisitor visitor)