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1   /*
2    * Copyright 2013 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.spdy;
17  
18  import io.netty.util.internal.ObjectUtil;
19  
20  /**
21   * The SPDY session status code and its description.
22   */
23  public class SpdySessionStatus implements Comparable<SpdySessionStatus> {
24  
25      /**
26       * 0 OK
27       */
28      public static final SpdySessionStatus OK =
29          new SpdySessionStatus(0, "OK");
30  
31      /**
32       * 1 Protocol Error
33       */
34      public static final SpdySessionStatus PROTOCOL_ERROR =
35          new SpdySessionStatus(1, "PROTOCOL_ERROR");
36  
37      /**
38       * 2 Internal Error
39       */
40      public static final SpdySessionStatus INTERNAL_ERROR =
41          new SpdySessionStatus(2, "INTERNAL_ERROR");
42  
43      /**
44       * Returns the {@link SpdySessionStatus} represented by the specified code.
45       * If the specified code is a defined SPDY status code, a cached instance
46       * will be returned.  Otherwise, a new instance will be returned.
47       */
48      public static SpdySessionStatus valueOf(int code) {
49          switch (code) {
50          case 0:
51              return OK;
52          case 1:
53              return PROTOCOL_ERROR;
54          case 2:
55              return INTERNAL_ERROR;
56          }
57  
58          return new SpdySessionStatus(code, "UNKNOWN (" + code + ')');
59      }
60  
61      private final int code;
62  
63      private final String statusPhrase;
64  
65      /**
66       * Creates a new instance with the specified {@code code} and its
67       * {@code statusPhrase}.
68       */
69      public SpdySessionStatus(int code, String statusPhrase) {
70          this.statusPhrase = ObjectUtil.checkNotNull(statusPhrase, "statusPhrase");
71          this.code = code;
72      }
73  
74      /**
75       * Returns the code of this status.
76       */
77      public int code() {
78          return code;
79      }
80  
81      /**
82       * Returns the status phrase of this status.
83       */
84      public String statusPhrase() {
85          return statusPhrase;
86      }
87  
88      @Override
89      public int hashCode() {
90          return code();
91      }
92  
93      @Override
94      public boolean equals(Object o) {
95          if (!(o instanceof SpdySessionStatus)) {
96              return false;
97          }
98  
99          return code() == ((SpdySessionStatus) o).code();
100     }
101 
102     @Override
103     public String toString() {
104         return statusPhrase();
105     }
106 
107     @Override
108     public int compareTo(SpdySessionStatus o) {
109         return code() - o.code();
110     }
111 }