/*
    * Copyright 2013 The Netty Project
    *
    * The Netty Project licenses this file to you under the Apache License,
    * version 2.0 (the "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at:
    *
    *   https://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package io.netty.handler.codec.spdy;
  
  import io.netty.util.internal.ObjectUtil;
  
  /**
   * The SPDY stream status code and its description.
   */
  public class SpdyStreamStatus implements Comparable<SpdyStreamStatus> {
  
      /**
       * 1 Protocol Error
       */
      public static final SpdyStreamStatus PROTOCOL_ERROR =
          new SpdyStreamStatus(1, "PROTOCOL_ERROR");
  
      /**
       * 2 Invalid Stream
       */
      public static final SpdyStreamStatus INVALID_STREAM =
          new SpdyStreamStatus(2, "INVALID_STREAM");
  
      /**
       * 3 Refused Stream
       */
      public static final SpdyStreamStatus REFUSED_STREAM =
          new SpdyStreamStatus(3, "REFUSED_STREAM");
  
      /**
       * 4 Unsupported Version
       */
      public static final SpdyStreamStatus UNSUPPORTED_VERSION =
          new SpdyStreamStatus(4, "UNSUPPORTED_VERSION");
  
      /**
       * 5 Cancel
       */
      public static final SpdyStreamStatus CANCEL =
          new SpdyStreamStatus(5, "CANCEL");
  
      /**
       * 6 Internal Error
       */
      public static final SpdyStreamStatus INTERNAL_ERROR =
          new SpdyStreamStatus(6, "INTERNAL_ERROR");
  
      /**
       * 7 Flow Control Error
       */
      public static final SpdyStreamStatus FLOW_CONTROL_ERROR =
          new SpdyStreamStatus(7, "FLOW_CONTROL_ERROR");
  
      /**
       * 8 Stream In Use
       */
      public static final SpdyStreamStatus STREAM_IN_USE =
          new SpdyStreamStatus(8, "STREAM_IN_USE");
  
      /**
       * 9 Stream Already Closed
       */
      public static final SpdyStreamStatus STREAM_ALREADY_CLOSED =
          new SpdyStreamStatus(9, "STREAM_ALREADY_CLOSED");
  
      /**
       * 10 Invalid Credentials
       */
      public static final SpdyStreamStatus INVALID_CREDENTIALS =
          new SpdyStreamStatus(10, "INVALID_CREDENTIALS");
  
      /**
       * 11 Frame Too Large
       */
      public static final SpdyStreamStatus FRAME_TOO_LARGE =
          new SpdyStreamStatus(11, "FRAME_TOO_LARGE");
  
      /**
       * Returns the {@link SpdyStreamStatus} represented by the specified code.
       * If the specified code is a defined SPDY status code, a cached instance
       * will be returned.  Otherwise, a new instance will be returned.
       */
      public static SpdyStreamStatus valueOf(int code) {
          if (code == 0) {
              throw new IllegalArgumentException(
                      "0 is not a valid status code for a RST_STREAM");
         }
 
         switch (code) {
         case 1:
             return PROTOCOL_ERROR;
         case 2:
             return INVALID_STREAM;
         case 3:
             return REFUSED_STREAM;
         case 4:
             return UNSUPPORTED_VERSION;
         case 5:
             return CANCEL;
         case 6:
             return INTERNAL_ERROR;
         case 7:
             return FLOW_CONTROL_ERROR;
         case 8:
             return STREAM_IN_USE;
         case 9:
             return STREAM_ALREADY_CLOSED;
         case 10:
             return INVALID_CREDENTIALS;
         case 11:
             return FRAME_TOO_LARGE;
         }
 
         return new SpdyStreamStatus(code, "UNKNOWN (" + code + ')');
     }
 
     private final int code;
 
     private final String statusPhrase;
 
     /**
      * Creates a new instance with the specified {@code code} and its
      * {@code statusPhrase}.
      */
     public SpdyStreamStatus(int code, String statusPhrase) {
         if (code == 0) {
             throw new IllegalArgumentException(
                     "0 is not a valid status code for a RST_STREAM");
         }
 
         this.statusPhrase = ObjectUtil.checkNotNull(statusPhrase, "statusPhrase");
         this.code = code;
     }
 
     /**
      * Returns the code of this status.
      */
     public int code() {
         return code;
     }
 
     /**
      * Returns the status phrase of this status.
      */
     public String statusPhrase() {
         return statusPhrase;
     }
 
     @Override
     public int hashCode() {
         return code();
     }
 
     @Override
     public boolean equals(Object o) {
         if (!(o instanceof SpdyStreamStatus)) {
             return false;
         }
 
         return code() == ((SpdyStreamStatus) o).code();
     }
 
     @Override
     public String toString() {
         return statusPhrase();
     }
 
     @Override
     public int compareTo(SpdyStreamStatus o) {
         return code() - o.code();
     }
 }