Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/4602#discussion_r139424865 --- Diff: flink-core/src/main/java/org/apache/flink/util/OptionalConsumer.java --- @@ -0,0 +1,55 @@ +/* + * 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.util; + +import java.util.Optional; +import java.util.function.Consumer; + +/** + * Utility class which allows to run code depending on whether the + * optional has a value or is empty. + * + * <p>This code has been copied from: https://stackoverflow.com/a/29395324/4815083. + * + * @param <T> type of the optional + */ +public class OptionalConsumer<T> { + private Optional<T> optional; --- End diff -- could be final
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