content: /*
   * Copyright (c) 2010-2018 Nathan Rajlich
   *
   *  Permission is hereby granted, free of charge, to any person
   *  obtaining a copy of this software and associated documentation
   *  files (the "Software"), to deal in the Software without
   *  restriction, including without limitation the rights to use,
   *  copy, modify, merge, publish, distribute, sublicense, and/or sell
   *  copies of the Software, and to permit persons to whom the
   *  Software is furnished to do so, subject to the following
   *  conditions:
   *
   *  The above copyright notice and this permission notice shall be
   *  included in all copies or substantial portions of the Software.
   *
   *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   *  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
   *  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
   *  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   *  OTHER DEALINGS IN THE SOFTWARE.
   */
  
  package com.alipay.api.java_websocket.protocols;
  
  import java.util.regex.Pattern;
  
  /**
   * Class which represents the protocol used as Sec-WebSocket-Protocol
   *
   * @since 1.3.7
   */
  public class Protocol implements IProtocol {
  
      private static final Pattern patternSpace = Pattern.compile(" ");
      private static final Pattern patternComma = Pattern.compile(",");
  
      /**
       * Attribute for the provided protocol
       */
      private final String providedProtocol;
  
      /**
       * Constructor for a Sec-Websocket-Protocol
       *
       * @param providedProtocol the protocol string
       */
      public Protocol(String providedProtocol) {
          if (providedProtocol == null) {
              throw new IllegalArgumentException();
          }
          this.providedProtocol = providedProtocol;
      }
  
      public boolean acceptProvidedProtocol(String inputProtocolHeader) {
          String protocolHeader = patternSpace.matcher(inputProtocolHeader).replaceAll("");
          String[] headers = patternComma.split(protocolHeader);
          for (String header : headers) {
              if (providedProtocol.equals(header)) {
                  return true;
              }
          }
          return false;
      }
  
      public String getProvidedProtocol() {
          return this.providedProtocol;
      }
  
      public IProtocol copyInstance() {
          return new Protocol(getProvidedProtocol());
      }
  
      public String toString() {
          return getProvidedProtocol();
      }
  
      public boolean equals(Object o) {
          if (this == o) { return true; }
          if (o == null || getClass() != o.getClass()) { return false; }
  
          Protocol protocol = (Protocol) o;
  
          return providedProtocol.equals(protocol.providedProtocol);
      }
  
      public int hashCode() {
          return providedProtocol.hashCode();
      }
  }
  