Github user dawidwys commented on a diff in the pull request:
https://github.com/apache/flink/pull/4039#discussion_r120558346
--- Diff:
flink-core/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractor.java
---
@@ -422,37 +521,52 @@ private static void registerFactory(Type t, Class<?
extends TypeInfoFactory> fac
throw new InvalidTypesException("Internal error
occurred.", e);
}
if (exec != null) {
+ Preconditions.checkArgument(
+ lambdaInputTypeArgumentIndices != null
&& lambdaInputTypeArgumentIndices.length >= 1,
+ "Indices for input type arguments
within lambda not provided");
+ Preconditions.checkArgument(
+ lambdaOutputTypeArgumentIndices != null,
+ "Indices for output type arguments
within lambda not provided");
// check for lambda type erasure
validateLambdaGenericParameters(exec);
// parameters must be accessed from behind,
since JVM can add additional parameters e.g. when using local variables inside
lambda function
- final int paramLen =
exec.getParameterTypes().length - 1;
+ final int paramLen =
exec.getParameterTypes().length;
+
+ final Method sam =
getSingleAbstractMethod(baseClass);
+ final int baseParametersLen =
sam.getParameterTypes().length;
--- End diff --
done
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