AlanConfluent commented on code in PR #26567:
URL: https://github.com/apache/flink/pull/26567#discussion_r2110482717
##########
flink-core/src/main/java/org/apache/flink/api/java/typeutils/TypeExtractionUtils.java:
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@@ -373,4 +374,28 @@ public static void validateLambdaType(Class<?> baseClass,
Type t) {
+ "Otherwise the type has to be specified
explicitly using type information.");
}
}
+
+ /**
+ * Will return true if the type of the given generic class type.
+ *
+ * @param clazz The generic class to check against
+ * @param type The type to be checked
+ */
+ public static boolean isGenericOfClass(Class<?> clazz, Type type) {
+ Optional<ParameterizedType> parameterized = getParameterizedType(type);
+ return clazz.equals(type)
+ || parameterized.isPresent() &&
clazz.equals(parameterized.get().getRawType());
+ }
+
+ /**
+ * Returns an optional of a ParameterizedType, if that's what the type is.
+ *
+ * @param type The type to check
+ * @return optional which is present if the type is a ParameterizedType
+ */
+ public static Optional<ParameterizedType> getParameterizedType(Type type) {
Review Comment:
Done. Added some unit tests for these methods.
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