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From kl0u <...@git.apache.org>
Subject [GitHub] flink pull request #2361: [FLINK-3318][cep] Add support for quantifiers to C...
Date Wed, 25 Jan 2017 14:41:04 GMT
Github user kl0u commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2361#discussion_r97789900
  
    --- Diff: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/compiler/NFACompiler.java
---
    @@ -130,26 +114,166 @@
     			}
     
     			// add the beginning state
    -			final State<T> beginningState;
    +			State<T> beginningState = states.get(BEGINNING_STATE_NAME);;
    +			addTransitions(beginningState, -1, patterns, states);
    +			return new NFAFactoryImpl<T>(inputTypeSerializer, windowTime, new HashSet<>(states.values()),
timeoutHandling);
    +		}
    +	}
     
    -			if (states.containsKey(BEGINNING_STATE_NAME)) {
    -				beginningState = states.get(BEGINNING_STATE_NAME);
    -			} else {
    -				beginningState = new State<>(BEGINNING_STATE_NAME, State.StateType.Start);
    -				states.put(BEGINNING_STATE_NAME, beginningState);
    -			}
    +	private static <T> void addTransitions(State<T> currentState, int patternPos,
ArrayList<Pattern<T, ?>> patterns, Map<String, State<T>> states) {
    --- End diff --
    
    The `patterns` can become a `List` instead of `ArrayList`.


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