1 /*
2 * Copyright 2016 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.handler.codec.smtp;
17
18 import io.netty.buffer.ByteBuf;
19 import io.netty.buffer.ByteBufUtil;
20 import io.netty.util.AsciiString;
21 import io.netty.util.internal.ObjectUtil;
22 import io.netty.util.internal.UnstableApi;
23
24 import java.util.HashMap;
25 import java.util.Map;
26
27 /**
28 * The command part of a {@link SmtpRequest}.
29 */
30 @UnstableApi
31 public final class SmtpCommand {
32 public static final SmtpCommand EHLO = new SmtpCommand(AsciiString.cached("EHLO"));
33 public static final SmtpCommand HELO = new SmtpCommand(AsciiString.cached("HELO"));
34 public static final SmtpCommand AUTH = new SmtpCommand(AsciiString.cached("AUTH"));
35 public static final SmtpCommand MAIL = new SmtpCommand(AsciiString.cached("MAIL"));
36 public static final SmtpCommand RCPT = new SmtpCommand(AsciiString.cached("RCPT"));
37 public static final SmtpCommand DATA = new SmtpCommand(AsciiString.cached("DATA"));
38 public static final SmtpCommand NOOP = new SmtpCommand(AsciiString.cached("NOOP"));
39 public static final SmtpCommand RSET = new SmtpCommand(AsciiString.cached("RSET"));
40 public static final SmtpCommand EXPN = new SmtpCommand(AsciiString.cached("EXPN"));
41 public static final SmtpCommand VRFY = new SmtpCommand(AsciiString.cached("VRFY"));
42 public static final SmtpCommand HELP = new SmtpCommand(AsciiString.cached("HELP"));
43 public static final SmtpCommand QUIT = new SmtpCommand(AsciiString.cached("QUIT"));
44 public static final SmtpCommand EMPTY = new SmtpCommand(AsciiString.cached(""));
45
46 private static final Map<String, SmtpCommand> COMMANDS = new HashMap<String, SmtpCommand>();
47 static {
48 COMMANDS.put(EHLO.name().toString(), EHLO);
49 COMMANDS.put(HELO.name().toString(), HELO);
50 COMMANDS.put(AUTH.name().toString(), AUTH);
51 COMMANDS.put(MAIL.name().toString(), MAIL);
52 COMMANDS.put(RCPT.name().toString(), RCPT);
53 COMMANDS.put(DATA.name().toString(), DATA);
54 COMMANDS.put(NOOP.name().toString(), NOOP);
55 COMMANDS.put(RSET.name().toString(), RSET);
56 COMMANDS.put(EXPN.name().toString(), EXPN);
57 COMMANDS.put(VRFY.name().toString(), VRFY);
58 COMMANDS.put(HELP.name().toString(), HELP);
59 COMMANDS.put(QUIT.name().toString(), QUIT);
60 COMMANDS.put(EMPTY.name().toString(), EMPTY);
61 }
62
63 /**
64 * Returns the {@link SmtpCommand} for the given command name.
65 */
66 public static SmtpCommand valueOf(CharSequence commandName) {
67 ObjectUtil.checkNotNull(commandName, "commandName");
68 SmtpCommand command = COMMANDS.get(commandName.toString());
69 return command != null ? command : new SmtpCommand(AsciiString.of(commandName));
70 }
71
72 private final AsciiString name;
73
74 private SmtpCommand(AsciiString name) {
75 this.name = name;
76 }
77
78 /**
79 * Return the command name.
80 */
81 public AsciiString name() {
82 return name;
83 }
84
85 void encode(ByteBuf buffer) {
86 ByteBufUtil.writeAscii(buffer, name);
87 }
88
89 boolean isContentExpected() {
90 return this.equals(DATA);
91 }
92
93 @Override
94 public int hashCode() {
95 return name.hashCode();
96 }
97
98 @Override
99 public boolean equals(Object obj) {
100 if (obj == this) {
101 return true;
102 }
103 if (!(obj instanceof SmtpCommand)) {
104 return false;
105 }
106 return name.contentEqualsIgnoreCase(((SmtpCommand) obj).name());
107 }
108
109 @Override
110 public String toString() {
111 return "SmtpCommand{name=" + name + '}';
112 }
113 }
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