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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.ByteBufHolder;
20  import io.netty.util.internal.UnstableApi;
21  
22  /**
23   * Content that is sent after the {@code DATA} request.
24   * Be aware that a {@link SmtpContent} / {@link LastSmtpContent} sequence must always use CRLF as line delimiter
25   * and the lines that start with a DOT must be escaped with an extra DOT as
26   * specified by <a href="https://www.ietf.org/rfc/rfc2821.txt">RFC2821</a>.
27   */
28  @UnstableApi
29  public interface SmtpContent extends ByteBufHolder {
30      @Override
31      SmtpContent copy();
32  
33      @Override
34      SmtpContent duplicate();
35  
36      @Override
37      SmtpContent retainedDuplicate();
38  
39      @Override
40      SmtpContent replace(ByteBuf content);
41  
42      @Override
43      SmtpContent retain();
44  
45      @Override
46      SmtpContent retain(int increment);
47  
48      @Override
49      SmtpContent touch();
50  
51      @Override
52      SmtpContent touch(Object hint);
53  }