/* * 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.kafka.clients.admin; import org.apache.kafka.common.KafkaFuture; import org.apache.kafka.common.annotation.InterfaceStability; import java.util.Collection; import java.util.Map; /** * The result of the listTopics call. */ @InterfaceStability.Unstable public class ListTopicsResults { final KafkaFuture<Map<String, TopicListing>> future; ListTopicsResults(KafkaFuture<Map<String, TopicListing>> future) { this.future = future; } /** * Return a future which yields a map of topic names to TopicListing objects. */ public KafkaFuture<Map<String, TopicListing>> namesToDescriptions() { return future; } /** * Return a future which yields a collection of TopicListing objects. */ public KafkaFuture<Collection<TopicListing>> descriptions() { return future.thenApply(new KafkaFuture.Function<Map<String, TopicListing>, Collection<TopicListing>>() { @Override public Collection<TopicListing> apply(Map<String, TopicListing> namesToDescriptions) { return namesToDescriptions.values(); } }); } /** * Return a future which yields a collection of topic names. */ public KafkaFuture<Collection<String>> names() { return future.thenApply(new KafkaFuture.Function<Map<String, TopicListing>, Collection<String>>() { @Override public Collection<String> apply(Map<String, TopicListing> namesToDescriptions) { return namesToDescriptions.keySet(); } }); } }