Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/5441#discussion_r167902843
--- Diff:
flink-libraries/flink-sql-client/src/main/java/org/apache/flink/table/client/gateway/TypedResult.java
---
@@ -0,0 +1,69 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.table.client.gateway;
+
+/**
+ * Result with an attached type (actual payload, EOS, etc.).
+ *
+ * @param <P> type of payload
+ */
+public class TypedResult<P> {
+
+ private final Type type;
+
+ private final P payload;
+
+ private TypedResult(Type type, P payload) {
+ this.type = type;
+ this.payload = payload;
+ }
+
+ public Type getType() {
+ return type;
+ }
+
+ public P getPayload() {
+ return payload;
+ }
+
+ //
--------------------------------------------------------------------------------------------
+
+ public static <T> TypedResult<T> empty() {
+ return new TypedResult<>(Type.EMPTY, null);
+ }
+
+ public static <T> TypedResult<T> payload(T payload) {
+ return new TypedResult<>(Type.PAYLOAD, payload);
+ }
+
+ public static <T> TypedResult<T> endOfStream() {
+ return new TypedResult<>(Type.EOS, null);
+ }
+
+ //
--------------------------------------------------------------------------------------------
+
+ /**
+ * Result types.
+ */
+ public enum Type {
--- End diff --
Rename to `ResultType` to avoid confusion with `java.lang.reflect.Type`?
---
