1 /*
2 * Copyright 2012 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 package io.netty.channel.local;
17
18 import io.netty.channel.Channel;
19
20 import java.net.SocketAddress;
21
22 /**
23 * An endpoint in the local transport. Each endpoint is identified by a unique
24 * case-insensitive string.
25 */
26 public final class LocalAddress extends SocketAddress implements Comparable<LocalAddress> {
27
28 private static final long serialVersionUID = 4644331421130916435L;
29
30 public static final LocalAddress ANY = new LocalAddress("ANY");
31
32 private final String id;
33 private final String strVal;
34
35 /**
36 * Creates a new ephemeral port based on the ID of the specified channel.
37 * Note that we prepend an upper-case character so that it never conflicts with
38 * the addresses created by a user, which are always lower-cased on construction time.
39 */
40 LocalAddress(Channel channel) {
41 StringBuilder buf = new StringBuilder(16);
42 buf.append("local:E");
43 buf.append(Long.toHexString(channel.hashCode() & 0xFFFFFFFFL | 0x100000000L));
44 buf.setCharAt(7, ':');
45 id = buf.substring(6);
46 strVal = buf.toString();
47 }
48
49 /**
50 * Creates a new instance with the specified ID.
51 */
52 public LocalAddress(String id) {
53 if (id == null) {
54 throw new NullPointerException("id");
55 }
56 id = id.trim().toLowerCase();
57 if (id.isEmpty()) {
58 throw new IllegalArgumentException("empty id");
59 }
60 this.id = id;
61 strVal = "local:" + id;
62 }
63
64 /**
65 * Returns the ID of this address.
66 */
67 public String id() {
68 return id;
69 }
70
71 @Override
72 public int hashCode() {
73 return id.hashCode();
74 }
75
76 @Override
77 public boolean equals(Object o) {
78 if (!(o instanceof LocalAddress)) {
79 return false;
80 }
81
82 return id.equals(((LocalAddress) o).id);
83 }
84
85 @Override
86 public int compareTo(LocalAddress o) {
87 return id.compareTo(o.id);
88 }
89
90 @Override
91 public String toString() {
92 return strVal;
93 }
94 }