libjava/java/security/Guard.java

/* Guard.java -- Check access to a guarded object
   Copyright (C) 1998 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

As a special exception, if you link this library with other files to
produce an executable, this library does not by itself cause the
resulting executable to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why the
executable file might be covered by the GNU General Public License. */


package java.security;

/**
  * This interface specifies a mechanism for querying whether or not
  * access is allowed to a guarded object.
  *
  * @version 0.0
  *
  * @author Aaron M. Renn (arenn@urbanophile.com)
  */
public interface Guard
{

/**
  * This method tests whether or not access is allowed to the specified
  * guarded object.  Access is allowed if this method returns silently.  If
  * access is denied, an exception is generated.
  *
  * @param obj The <code>Object</code> to test
  *
  * @exception SecurityException If access to the object is denied.
  */
public abstract void
checkGuard(Object obj) throws SecurityException;

} // interface Guard