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1   /*
2    * Copyright 2020 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.util.internal.UnstableApi;
19  
20  /**
21   * HTTP/2 Push Promise Frame
22   */
23  @UnstableApi
24  public interface Http2PushPromiseFrame extends Http2StreamFrame {
25  
26      /**
27       * Set the Promise {@link Http2FrameStream} object for this frame.
28       */
29      Http2StreamFrame pushStream(Http2FrameStream stream);
30  
31      /**
32       * Returns the Promise {@link Http2FrameStream} object for this frame, or {@code null} if the
33       * frame has yet to be associated with a stream.
34       */
35      Http2FrameStream pushStream();
36  
37      /**
38       * {@link Http2Headers} sent in Push Promise
39       */
40      Http2Headers http2Headers();
41  
42      /**
43       * Frame padding to use. Will be non-negative and less than 256.
44       */
45      int padding();
46  
47      /**
48       * Promised Stream ID
49       */
50      int promisedStreamId();
51  
52      @Override
53      Http2PushPromiseFrame stream(Http2FrameStream stream);
54  
55  }