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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.http2;
17  
18  import io.netty.buffer.ByteBuf;
19  import io.netty.buffer.ByteBufHolder;
20  import io.netty.util.internal.UnstableApi;
21  
22  /**
23   * HTTP/2 DATA frame.
24   */
25  @UnstableApi
26  public interface Http2DataFrame extends Http2StreamFrame, ByteBufHolder {
27  
28      /**
29       * Frame padding to use. Will be non-negative and less than 256.
30       */
31      int padding();
32  
33      /**
34       * Payload of DATA frame. Will not be {@code null}.
35       */
36      @Override
37      ByteBuf content();
38  
39      /**
40       * Returns the number of bytes that are flow-controlled initially, so even if the {@link #content()} is consumed
41       * this will not change.
42       */
43      int initialFlowControlledBytes();
44  
45      /**
46       * Returns {@code true} if the END_STREAM flag is set.
47       */
48      boolean isEndStream();
49  
50      @Override
51      Http2DataFrame copy();
52  
53      @Override
54      Http2DataFrame duplicate();
55  
56      @Override
57      Http2DataFrame retainedDuplicate();
58  
59      @Override
60      Http2DataFrame replace(ByteBuf content);
61  
62      @Override
63      Http2DataFrame retain();
64  
65      @Override
66      Http2DataFrame retain(int increment);
67  
68      @Override
69      Http2DataFrame touch();
70  
71      @Override
72      Http2DataFrame touch(Object hint);
73  }