/* DynValueCommon.java --
   Copyright (C) 2005 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.

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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
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package org.omg.DynamicAny;

import org.omg.CORBA.portable.IDLEntity;

import java.io.Serializable;

/**
 * Defines DynAny that may hold CORBA <code>null</code>. The
 * {@link DynValueCommonOperations} provides methods for setting the value to
 * <code>null</code> or non-<code>null</code> and checking if the value is
 * <code>null</code>.
 *
 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
 */
public interface DynValueCommon
  extends DynValueCommonOperations, DynAny, IDLEntity, org.omg.CORBA.Object,
  Serializable
{
  /**
   * Check if this {@link DynAny} is holding the <code>null</code>.
   *
   * @return true if this {@link DynAny} is holding the <code>null</code>,
   * false otherwise.
   */
  boolean is_null();

  /**
   * Set the value of this {@link DynAny} to CORBA <code>null</code>.
   */
  void set_to_null();

  /**
   * Set the value of this {@link DynAny} to the default non-null value. The
   * target {@link DynAny} creates a new data structure, intialised to the
   * agreed default values, as defined in {@link DynAnyFactoryOperations}.
   */
  void set_to_value();
}
