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   /*
    * Copyright 2016 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty.bootstrap;
  
  import io.netty.channel.Channel;
  import io.netty.resolver.AddressResolverGroup;
  
  import java.net.SocketAddress;
  
  /**
   * Exposes the configuration of a {@link Bootstrap}.
   */
  public final class BootstrapConfig extends AbstractBootstrapConfig<Bootstrap, Channel> {
  
      BootstrapConfig(Bootstrap bootstrap) {
          super(bootstrap);
      }
  
      /**
       * Returns the configured remote address or {@code null} if non is configured yet.
       */
      public SocketAddress remoteAddress() {
          return bootstrap.remoteAddress();
      }
  
      /**
       * Returns the configured {@link AddressResolverGroup}, {@code null} if resolver was disabled
       * with {@link Bootstrap#disableResolver()}, or the default if not configured yet.
       */
      public AddressResolverGroup<?> resolver() {
          return bootstrap.resolver();
      }
  
      @Override
      public String toString() {
          StringBuilder buf = new StringBuilder(super.toString());
          buf.setLength(buf.length() - 1);
          AddressResolverGroup<?> resolver = resolver();
          if (resolver != null) {
              buf.append(", resolver: ")
                      .append(resolver);
          }
          SocketAddress remoteAddress = remoteAddress();
          if (remoteAddress != null) {
              buf.append(", remoteAddress: ")
                      .append(remoteAddress);
          }
          return buf.append(')').toString();
      }
  }