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.internals;
  
  import org.apache.kafka.clients.ClientUtils;
  import org.apache.kafka.clients.CommonClientConfigs;
  import org.apache.kafka.clients.admin.AdminClientConfig;
  import org.apache.kafka.common.config.AbstractConfig;
  import org.apache.kafka.common.config.ConfigException;
  
  import java.net.InetSocketAddress;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  
  public final class AdminBootstrapAddresses {
      private final boolean usingBootstrapControllers;
      private final List<InetSocketAddress> addresses;
  
      AdminBootstrapAddresses(
          boolean usingBootstrapControllers,
          List<InetSocketAddress> addresses
      ) {
          this.usingBootstrapControllers = usingBootstrapControllers;
          this.addresses = addresses;
      }
  
      public boolean usingBootstrapControllers() {
          return usingBootstrapControllers;
      }
  
      public List<InetSocketAddress> addresses() {
          return addresses;
      }
  
      public static AdminBootstrapAddresses fromConfig(AbstractConfig config) {
          List<String> bootstrapServers = config.getList(CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG);
          if (bootstrapServers == null) {
              bootstrapServers = Collections.emptyList();
          }
          List<String> controllerServers = config.getList(AdminClientConfig.BOOTSTRAP_CONTROLLERS_CONFIG);
          if (controllerServers == null) {
              controllerServers = Collections.emptyList();
          }
          String clientDnsLookupConfig = config.getString(CommonClientConfigs.CLIENT_DNS_LOOKUP_CONFIG);
          if (bootstrapServers.isEmpty()) {
              if (controllerServers.isEmpty()) {
                  throw new ConfigException("You must set either " +
                          CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG + " or " +
                          AdminClientConfig.BOOTSTRAP_CONTROLLERS_CONFIG);
              } else {
                  return new AdminBootstrapAddresses(true,
                      ClientUtils.parseAndValidateAddresses(controllerServers, clientDnsLookupConfig));
              }
          } else {
              if (controllerServers.isEmpty()) {
                  return new AdminBootstrapAddresses(false,
                      ClientUtils.parseAndValidateAddresses(bootstrapServers, clientDnsLookupConfig));
              } else {
                  throw new ConfigException("You cannot set both " +
                          CommonClientConfigs.BOOTSTRAP_SERVERS_CONFIG + " and " +
                          AdminClientConfig.BOOTSTRAP_CONTROLLERS_CONFIG);
              }
          }
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(usingBootstrapControllers, addresses);
      }
  
      @Override
      public boolean equals(Object o) {
          if (o == null || (!o.getClass().equals(AdminBootstrapAddresses.class))) return false;
          AdminBootstrapAddresses other = (AdminBootstrapAddresses) o;
          return usingBootstrapControllers == other.usingBootstrapControllers &&
              addresses.equals(other.addresses);
      }
  
      @Override
      public String toString() {
          StringBuilder bld = new StringBuilder();
          bld.append("AdminBootstrapAddresses");
          bld.append("(usingBoostrapControllers=").append(usingBootstrapControllers);
          bld.append(", addresses=[");
          String prefix = "";
          for (InetSocketAddress address : addresses) {
              bld.append(prefix).append(address);
              prefix = ", ";
          }
          bld.append("])");
          return bld.toString();
      }
  }
  