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From dawidwys <...@git.apache.org>
Subject [GitHub] flink issue #4039: [FLINK-6783] Changed passing index of type argument while...
Date Fri, 02 Jun 2017 09:20:05 GMT
Github user dawidwys commented on the issue:

    https://github.com/apache/flink/pull/4039
  
    Sure, with the arrays you provide index of the input/output parameters in lambdas. The
lambdaInputTypeArgumentIndices[0] is the argument index of lambda function. The lambdaInputTypeArgumentIndices[1]
is the index within the argument, if the argument is a generic type and so on.
    
    So for example if we have a functional interface like:
    `
    public interface Dummy<IN, OUT> {
    OUT apply(Map<String, List<IN>> value)
    }
    `
    To extract inputType **IN** from lambda you need to provide array like `new int[] {0,1,0}`.



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