jerrypeng commented on a change in pull request #1758: Windowing for Pulsar Functions URL: https://github.com/apache/incubator-pulsar/pull/1758#discussion_r187530714
########## File path: pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/JavaInstance.java ########## @@ -61,8 +67,21 @@ public JavaInstance(InstanceConfig config, Object userClassObject, // create the functions if (userClassObject instanceof Function) { this.function = (Function) userClassObject; - } else { - this.javaUtilFunction = (java.util.function.Function) userClassObject; + } else if (userClassObject instanceof java.util.function.Function) { + Class<?>[] typeArgs = TypeResolver.resolveRawArguments( + java.util.function.Function.class, userClassObject.getClass()); + // check if window function + if (typeArgs[0].equals(Collection.class)) { Review comment: yup good catch! ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services