content: package org.java_websocket;
  
  import java.net.InetSocketAddress;
  import java.nio.ByteBuffer;
  import java.nio.channels.NotYetConnectedException;
  
  import org.java_websocket.drafts.Draft;
  import org.java_websocket.framing.Framedata;
  import org.java_websocket.framing.Framedata.Opcode;
  
  public interface WebSocket {
  	public enum Role {
  		CLIENT, SERVER
  	}
  
  	public enum READYSTATE {
  		NOT_YET_CONNECTED, CONNECTING, OPEN, CLOSING, CLOSED;
  	}
  
  	/**
  	 * The default port of WebSockets, as defined in the spec. If the nullary
  	 * constructor is used, DEFAULT_PORT will be the port the WebSocketServer
  	 * is binded to. Note that ports under 1024 usually require root permissions.
  	 */
  	public static final int DEFAULT_PORT = 80;
  
  	public static final int DEFAULT_WSS_PORT = 443;
  
  	/**
  	 * sends the closing handshake.
  	 * may be send in response to an other handshake.
  	 */
  	public void close( int code, String message );
  
  	public void close( int code );
  
  	/** Convenience function which behaves like close(CloseFrame.NORMAL) */
  	public void close();
  
  	/**
  	 * This will close the connection immediately without a proper close handshake.
  	 * The code and the message therefore won't be transfered over the wire also they will be forwarded to onClose/onWebsocketClose.
  	 **/
  	public abstract void closeConnection( int code, String message );
  
  	/**
  	 * Send Text data to the other end.
  	 * 
  	 * @throws IllegalArgumentException
  	 * @throws NotYetConnectedException
  	 */
  	public abstract void send( String text ) throws NotYetConnectedException;
  
  	/**
  	 * Send Binary data (plain bytes) to the other end.
  	 * 
  	 * @throws IllegalArgumentException
  	 * @throws NotYetConnectedException
  	 */
  	public abstract void send( ByteBuffer bytes ) throws IllegalArgumentException , NotYetConnectedException;
  
  	public abstract void send( byte[] bytes ) throws IllegalArgumentException , NotYetConnectedException;
  
  	public abstract void sendFrame( Framedata framedata );
  
  	/**
  	 * Allows to send continuous/fragmented frames conveniently. <br>
  	 * For more into on this frame type see http://tools.ietf.org/html/rfc6455#section-5.4<br>
  	 * 
  	 * If the first frame you send is also the last then it is not a fragmented frame and will received via onMessage instead of onFragmented even though it was send by this method.
  	 * 
  	 * @param op
  	 *            This is only important for the first frame in the sequence. Opcode.TEXT, Opcode.BINARY are allowed.
  	 * @param buffer
  	 *            The buffer which contains the payload. It may have no bytes remaining.
  	 * @param fin
  	 *            true means the current frame is the last in the sequence.
  	 **/
  	public abstract void sendFragmentedFrame( Opcode op, ByteBuffer buffer, boolean fin );
  
  	public abstract boolean hasBufferedData();
  
  	/**
  	 * @returns never returns null
  	 */
  	public abstract InetSocketAddress getRemoteSocketAddress();
  
  	/**
  	 * @returns never returns null
  	 */
  	public abstract InetSocketAddress getLocalSocketAddress();
  
  	public abstract boolean isConnecting();
  
  	public abstract boolean isOpen();
  
  	public abstract boolean isClosing();
  
  	/**
  	 * Returns true when no further frames may be submitted<br>
  	 * This happens before the socket connection is closed.
  	 */
  	public abstract boolean isFlushAndClose();
  
  	/** Returns whether the close handshake has been completed and the socket is closed. */
  	public abstract boolean isClosed();
  
  	public abstract Draft getDraft();
  
  	/**
  	 * Retrieve the WebSocket 'readyState'.
  	 * This represents the state of the connection.
  	 * It returns a numerical value, as per W3C WebSockets specs.
  	 * 
  	 * @return Returns '0 = CONNECTING', '1 = OPEN', '2 = CLOSING' or '3 = CLOSED'
  	 */
  	public abstract READYSTATE getReadyState();
  	
  	/**
  	 * Returns the HTTP Request-URI as defined by http://tools.ietf.org/html/rfc2616#section-5.1.2<br>
  	 * If the opening handshake has not yet happened it will return null.
  	 **/
  	public abstract String getResourceDescriptor();
  }