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 * 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.netty5.channel.local;
17
18 import io.netty5.channel.Channel;
19
20 import java.net.SocketAddress;
21 import java.util.UUID;
22
23 import static io.netty5.util.internal.ObjectUtil.checkNonEmptyAfterTrim;
24
25 /**
26 * An endpoint in the local transport. Each endpoint is identified by a unique
27 * case-insensitive string.
28 */
29 public final class LocalAddress extends SocketAddress implements Comparable<LocalAddress> {
30
31 private static final long serialVersionUID = 4644331421130916435L;
32
33 public static final LocalAddress ANY = new LocalAddress("ANY");
34
35 private final String id;
36 private final String strVal;
37
38 /**
39 * Creates a new ephemeral port based on the ID of the specified channel.
40 * Note that we prepend an upper-case character so that it never conflicts with
41 * the addresses created by a user, which are always lower-cased on construction time.
42 */
43 LocalAddress(Channel channel) {
44 StringBuilder buf = new StringBuilder(16);
45 buf.append("local:E");
46 buf.append(Long.toHexString(channel.hashCode() & 0xFFFFFFFFL | 0x100000000L));
47 buf.setCharAt(7, ':');
48 id = buf.substring(6);
49 strVal = buf.toString();
50 }
51
52 /**
53 * Creates a new instance with the specified ID.
54 */
55 public LocalAddress(String id) {
56 this.id = checkNonEmptyAfterTrim(id, "id").toLowerCase();
57 this.strVal = "local:" + this.id;
58 }
59
60 /**
61 * Creates a new instance with a random ID based on the given class.
62 */
63 public LocalAddress(Class<?> cls) {
64 this(cls.getSimpleName() + '/' + UUID.randomUUID());
65 }
66
67 /**
68 * Returns the ID of this address.
69 */
70 public String id() {
71 return id;
72 }
73
74 @Override
75 public int hashCode() {
76 return id.hashCode();
77 }
78
79 @Override
80 public boolean equals(Object o) {
81 if (!(o instanceof LocalAddress)) {
82 return false;
83 }
84
85 return id.equals(((LocalAddress) o).id);
86 }
87
88 @Override
89 public int compareTo(LocalAddress o) {
90 return id.compareTo(o.id);
91 }
92
93 @Override
94 public String toString() {
95 return strVal;
96 }
97 }