Github user twalthr commented on a diff in the pull request:
https://github.com/apache/flink/pull/4039#discussion_r120387120
--- Diff:
flink-core/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractor.java
---
@@ -354,49 +479,21 @@ private static void registerFactory(Type t, Class<?
extends TypeInfoFactory> fac
/**
* Returns the unary operator's return type.
*
- * @param function Function to extract the return type from
- * @param baseClass Base class of the function
- * @param hasIterable True if the first function parameter is an
iterable, otherwise false
- * @param hasCollector True if the function has an additional collector
parameter, otherwise false
- * @param inType Type of the input elements (In case of an iterable, it
is the element type)
- * @param functionName Function name
- * @param allowMissing Can the type information be missing
- * @param <IN> Input type
- * @param <OUT> Output type
- * @return TypeInformation of the return type of the function
- */
- @SuppressWarnings("unchecked")
- @PublicEvolving
- public static <IN, OUT> TypeInformation<OUT> getUnaryOperatorReturnType(
- Function function,
- Class<?> baseClass,
- boolean hasIterable,
- boolean hasCollector,
- TypeInformation<IN> inType,
- String functionName,
- boolean allowMissing) {
-
- return getUnaryOperatorReturnType(
- function,
- baseClass,
- hasIterable ? 0 : -1,
- hasCollector ? 0 : -1,
- inType,
- functionName,
- allowMissing);
- }
-
- /**
- * Returns the unary operator's return type.
+ * <p><b>NOTE:</b> lambda type indices allows extraction of Type from
lambdas. To extract input type <b>IN</b>
--- End diff --
allow
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