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   /*
    * Copyright 2015 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.resolver.dns;
  
  import java.net.InetSocketAddress;
  
  final class SingletonDnsServerAddresses extends DnsServerAddresses {
  
      private final InetSocketAddress address;
  
      private final DnsServerAddressStream stream = new DnsServerAddressStream() {
          @Override
          public InetSocketAddress next() {
              return address;
          }
  
          @Override
          public int size() {
              return 1;
          }
  
          @Override
          public DnsServerAddressStream duplicate() {
              return this;
          }
  
          @Override
          public String toString() {
              return SingletonDnsServerAddresses.this.toString();
          }
      };
  
      SingletonDnsServerAddresses(InetSocketAddress address) {
          this.address = address;
      }
  
      @Override
      public DnsServerAddressStream stream() {
          return stream;
      }
  
      @Override
      public String toString() {
          return "singleton(" + address + ")";
      }
  }