1 /*
2 * Copyright 2017 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.Inet4Address;
19 import java.net.Inet6Address;
20 import java.util.Collections;
21 import java.util.HashMap;
22 import java.util.Map;
23
24 /**
25 * A container of hosts file entries.
26 * The mappings contain only the first entry per hostname.
27 * Consider using {@link HostsFileEntriesProvider} when mappings with all entries per hostname are needed.
28 */
29 public final class HostsFileEntries {
30
31 /**
32 * Empty entries
33 */
34 static final HostsFileEntries EMPTY =
35 new HostsFileEntries(
36 Collections.<String, Inet4Address>emptyMap(),
37 Collections.<String, Inet6Address>emptyMap());
38
39 private final Map<String, Inet4Address> inet4Entries;
40 private final Map<String, Inet6Address> inet6Entries;
41
42 public HostsFileEntries(Map<String, Inet4Address> inet4Entries, Map<String, Inet6Address> inet6Entries) {
43 this.inet4Entries = Collections.unmodifiableMap(new HashMap<String, Inet4Address>(inet4Entries));
44 this.inet6Entries = Collections.unmodifiableMap(new HashMap<String, Inet6Address>(inet6Entries));
45 }
46
47 /**
48 * The IPv4 entries
49 * @return the IPv4 entries
50 */
51 public Map<String, Inet4Address> inet4Entries() {
52 return inet4Entries;
53 }
54
55 /**
56 * The IPv6 entries
57 * @return the IPv6 entries
58 */
59 public Map<String, Inet6Address> inet6Entries() {
60 return inet6Entries;
61 }
62 }