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From kl0u <...@git.apache.org>
Subject [GitHub] flink pull request #4143: [FLINK-6418][cep] Support for dynamic state change...
Date Fri, 23 Jun 2017 10:08:56 GMT
Github user kl0u commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4143#discussion_r123710396
  
    --- Diff: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/pattern/Pattern.java
---
    @@ -186,6 +193,24 @@ public Quantifier getQuantifier() {
     	}
     
     	/**
    +	 * Applies a stop condition for a looping state. It allows cleaning the underlying state.
    +	 *
    +	 * @param untilCondition a condition an event has to satisfy to stop collecting events
into looping state
    +	 * @return The same pattern with applied untilCondition
    +	 */
    +	public Pattern<T, F> until(IterativeCondition<F> untilCondition) {
    +		Preconditions.checkNotNull(untilCondition, "The condition cannot be null");
    +		if (!quantifier.hasProperty(Quantifier.QuantifierProperty.LOOPING)) {
    +			throw new MalformedPatternException("The until condition is only applicable to looping
states.");
    +		}
    +
    --- End diff --
    
    Check also if there is another `until` condition already specified and throw an exception
saying that a condition has already been specified for the pattern.


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