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1   /*
2    * Copyright 2014 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License, version 2.0 (the
5    * "License"); you may not use this file except in compliance with the License. You may obtain a
6    * 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 distributed under the License
11   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
12   * or implied. See the License for the specific language governing permissions and limitations under
13   * the License.
14   */
15  package io.netty5.handler.codec.http2;
16  
17  import io.netty5.util.internal.UnstableApi;
18  
19  /**
20   * All error codes identified by the HTTP/2 spec.
21   */
22  @UnstableApi
23  public enum Http2Error {
24      NO_ERROR(0x0),
25      PROTOCOL_ERROR(0x1),
26      INTERNAL_ERROR(0x2),
27      FLOW_CONTROL_ERROR(0x3),
28      SETTINGS_TIMEOUT(0x4),
29      STREAM_CLOSED(0x5),
30      FRAME_SIZE_ERROR(0x6),
31      REFUSED_STREAM(0x7),
32      CANCEL(0x8),
33      COMPRESSION_ERROR(0x9),
34      CONNECT_ERROR(0xA),
35      ENHANCE_YOUR_CALM(0xB),
36      INADEQUATE_SECURITY(0xC),
37      HTTP_1_1_REQUIRED(0xD);
38  
39      private final long code;
40      private static final Http2Error[] INT_TO_ENUM_MAP;
41      static {
42          Http2Error[] errors = values();
43          Http2Error[] map = new Http2Error[errors.length];
44          for (Http2Error error : errors) {
45              map[(int) error.code()] = error;
46          }
47          INT_TO_ENUM_MAP = map;
48      }
49  
50      Http2Error(long code) {
51          this.code = code;
52      }
53  
54      /**
55       * Gets the code for this error used on the wire.
56       */
57      public long code() {
58          return code;
59      }
60  
61      public static Http2Error valueOf(long value) {
62          return value >= INT_TO_ENUM_MAP.length || value < 0 ? null : INT_TO_ENUM_MAP[(int) value];
63      }
64  }