/*  * Copyright (c) 2000 by Matt Welsh and The Regents of the University of  * California. All rights reserved. * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose, without fee, and without written agreement is * hereby granted, provided that the above copyright notice and the following * two paragraphs appear in all copies of this software. *  * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *  * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * Author: Matt Welsh <mdw@cs.berkeley.edu> *  */package ninja2.core.io_core.nbio;/** * Selectable is an interface which represents an object (such as a socket * or file descriptor) which may be used with the SelectItem and SelectSet * classes. It defines no methods. * * The static final fields of this interface specify the event types that * may be used with SelectItem and SelectSet. */public interface Selectable {  /**   * Event mask specifying that data can be read without blocking.   */  public static final short READ_READY = (short)0x01;  /**   * Event mask specifying that data can be written without blocking.   */  public static final short WRITE_READY = (short)0x02;  /**   * Event mask specifying that a new incoming connection is pending.   */  public static final short ACCEPT_READY = READ_READY;  /**   * Event mask specifying that a pending outgoing connection has   * been established.   */  public static final short CONNECT_READY = WRITE_READY;  /**   * Specifies that an error has occured on this SelectItem.   * Invoking the requested read, write, connect, etc. operation will   * throw the appropriate exception. Only valid for revents.   */  public static final short SELECT_ERROR = (short)0x80;  }