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1   /*
2    * Copyright 2015 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  
17  package io.netty.resolver.dns;
18  
19  import java.net.InetSocketAddress;
20  
21  abstract class DefaultDnsServerAddresses extends DnsServerAddresses {
22  
23      protected final InetSocketAddress[] addresses;
24      private final String strVal;
25  
26      DefaultDnsServerAddresses(String type, InetSocketAddress[] addresses) {
27          this.addresses = addresses;
28  
29          final StringBuilder buf = new StringBuilder(type.length() + 2 + addresses.length * 16);
30          buf.append(type).append('(');
31  
32          for (InetSocketAddress a: addresses) {
33              buf.append(a).append(", ");
34          }
35  
36          buf.setLength(buf.length() - 2);
37          buf.append(')');
38  
39          strVal = buf.toString();
40      }
41  
42      @Override
43      public String toString() {
44          return strVal;
45      }
46  }