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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    *   https://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  package io.netty.resolver;
17  
18  import java.net.InetAddress;
19  
20  /**
21   * Resolves a hostname against the hosts file entries.
22   */
23  public interface HostsFileEntriesResolver {
24  
25      /**
26       * Default instance: a {@link DefaultHostsFileEntriesResolver}.
27       */
28      HostsFileEntriesResolver DEFAULT = new DefaultHostsFileEntriesResolver();
29  
30      /**
31       * Resolve the address of a hostname against the entries in a hosts file, depending on some address types.
32       * @param inetHost the hostname to resolve
33       * @param resolvedAddressTypes the address types to resolve
34       * @return the first matching address
35       */
36      InetAddress address(String inetHost, ResolvedAddressTypes resolvedAddressTypes);
37  }