src/share/classes/java/nio/file/WatchKey.java

*** 79,113 ****
   * is processing the events for an object at any time.
   *
   * @since 1.7
   */
  
! public abstract class WatchKey {
!     /**
!      * Initializes a new instance of this class.
!      */
!     protected WatchKey() { }
  
      /**
       * Tells whether or not this watch key is valid.
       *
       * <p> A watch key is valid upon creation and remains until it is cancelled,
       * or its watch service is closed.
       *
       * @return  {@code true} if, and only if, this watch key is valid
       */
!     public abstract boolean isValid();
  
      /**
       * Retrieves and removes all pending events for this watch key, returning
       * a {@code List} of the events that were retrieved.
       *
       * <p> Note that this method does not wait if there are no events pending.
       *
       * @return  the list of the events retrieved; may be empty
       */
!     public abstract List<WatchEvent<?>> pollEvents();
  
      /**
       * Resets this watch key.
       *
       * <p> If this watch key has been cancelled or this watch key is already in
--- 79,109 ----
   * is processing the events for an object at any time.
   *
   * @since 1.7
   */
  
! public interface WatchKey {
  
      /**
       * Tells whether or not this watch key is valid.
       *
       * <p> A watch key is valid upon creation and remains until it is cancelled,
       * or its watch service is closed.
       *
       * @return  {@code true} if, and only if, this watch key is valid
       */
!     boolean isValid();
  
      /**
       * Retrieves and removes all pending events for this watch key, returning
       * a {@code List} of the events that were retrieved.
       *
       * <p> Note that this method does not wait if there are no events pending.
       *
       * @return  the list of the events retrieved; may be empty
       */
!     List<WatchEvent<?>> pollEvents();
  
      /**
       * Resets this watch key.
       *
       * <p> If this watch key has been cancelled or this watch key is already in
*** 119,129 ****
       *
       * @return  {@code true} if the watch key is valid and has been reset, and
       *          {@code false} if the watch key could not be reset because it is
       *          no longer {@link #isValid valid}
       */
!     public abstract boolean reset();
  
      /**
       * Cancels the registration with the watch service. Upon return the watch key
       * will be invalid. If the watch key is enqueued, waiting to be retrieved
       * from the watch service, then it will remain in the queue until it is
--- 115,125 ----
       *
       * @return  {@code true} if the watch key is valid and has been reset, and
       *          {@code false} if the watch key could not be reset because it is
       *          no longer {@link #isValid valid}
       */
!     boolean reset();
  
      /**
       * Cancels the registration with the watch service. Upon return the watch key
       * will be invalid. If the watch key is enqueued, waiting to be retrieved
       * from the watch service, then it will remain in the queue until it is
*** 132,138 ****
       * cancelled.
       *
       * <p> If this watch key has already been cancelled then invoking this
       * method has no effect.  Once cancelled, a watch key remains forever invalid.
       */
!     public abstract void cancel();
  }
--- 128,150 ----
       * cancelled.
       *
       * <p> If this watch key has already been cancelled then invoking this
       * method has no effect.  Once cancelled, a watch key remains forever invalid.
       */
!     void cancel();
! 
!     /**
!      * Returns the object for which this watch key was created. This method will
!      * continue to return the object even after the key is cancelled.
!      *
!      * <p> As the {@code WatchService} is intended to map directly on to the
!      * native file event notification facility (where available) then many of
!      * details on how registered objects are watched is highly implementation
!      * specific. When watching a directory for changes for example, and the
!      * directory is moved or renamed in the file system, there is no guarantee
!      * that the watch key will be cancelled and so the object returned by this
!      * method may no longer be a valid path to the directory.
!      *
!      * @return the object for which this watch key was created
!      */
!     //T watchable();
  }