content: /*
   * Copyright (c) 2010-2019 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.youku.ribut.core.socket.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;
  	}
  
  	@Override
  	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;
  	}
  
  	@Override
  	public String getProvidedProtocol() {
  		return this.providedProtocol;
  	}
  
  	@Override
  	public IProtocol copyInstance() {
  		return new Protocol( getProvidedProtocol() );
  	}
  
  	@Override
  	public String toString() {
  		return getProvidedProtocol();
  	}
  
  	@Override
  	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 );
  	}
  
  	@Override
  	public int hashCode() {
  		return providedProtocol.hashCode();
  	}
  }
  