content: /*
   * 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.annotation.InterfaceStability;
  
  import java.util.Locale;
  import java.util.Objects;
  
  /**
   * An endpoint for a raft quorum voter.
   */
  @InterfaceStability.Stable
  public class RaftVoterEndpoint {
      private final String listener;
      private final String host;
      private final int port;
  
      static String requireNonNullAllCapsNonEmpty(String input) {
          if (input == null) {
              throw new IllegalArgumentException("Null argument not allowed.");
          }
          if (!input.trim().equals(input)) {
              throw new IllegalArgumentException("Leading or trailing whitespace is not allowed.");
          }
          if (input.isEmpty()) {
              throw new IllegalArgumentException("Empty string is not allowed.");
          }
          if (!input.toUpperCase(Locale.ROOT).equals(input)) {
              throw new IllegalArgumentException("String must be UPPERCASE.");
          }
          return input;
      }
  
      /**
       * Create an endpoint for a metadata quorum voter.
       *
       * @param listener          The human-readable name for this endpoint. For example, CONTROLLER.
       * @param host              The DNS hostname for this endpoint.
       * @param port              The network port for this endpoint.
       */
      public RaftVoterEndpoint(
          String listener,
          String host,
          int port
      ) {
          this.listener = requireNonNullAllCapsNonEmpty(listener);
          this.host = Objects.requireNonNull(host);
          this.port = port;
      }
  
      /**
       * The listener name for this endpoint.
       */
      public String listener() {
          return listener;
      }
  
      /**
       * @deprecated Since 4.1. Use {@link #listener()} instead. This function will be removed in 5.0.
       */
      @Deprecated(since = "4.1", forRemoval = true)
      public String name() {
          return listener;
      }
  
      public String host() {
          return host;
      }
  
      public int port() {
          return port;
      }
  
      @Override
      public boolean equals(Object o) {
          if (o == null || (!o.getClass().equals(getClass()))) return false;
          RaftVoterEndpoint other = (RaftVoterEndpoint) o;
          return listener.equals(other.listener) &&
              host.equals(other.host) &&
              port == other.port;
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(listener, host, port);
      }
  
      @Override
      public String toString() {
          // enclose IPv6 hosts in square brackets for readability
          String hostString = host.contains(":") ? "[" + host + "]" : host;
          return listener + "://" + hostString + ":" + port;
      }
  }
  