package org.jacorb.naming;

/*
 * JacORB - a free Java ORB
 *
 * Copyright (C) 1997-2014 Gerald Brose / The JacORB Team.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Library General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option) any
 * later version.
 *
 * This library 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 Library General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */

import org.omg.CORBA.INTERNAL;
import org.omg.CORBA.UserException;
import org.omg.CosNaming.Binding;


/**
 * Implementation of the "BindingIterator" interface
 *
 * @author Gerald Brose
 */
public class BindingIteratorImpl extends org.omg.CosNaming.BindingIteratorPOA
{
   Binding[] bindings;

   int       iterator_pos = 0;


   public BindingIteratorImpl (Binding[] b)
   {
      bindings = b;
      if (b.length > 0)
         iterator_pos = 0;
   }


   public void destroy ()
   {
      bindings = null;
      try
      {
         _poa ().deactivate_object (_poa ().servant_to_id (this));
      }
      catch (UserException e)
      {
         throw new INTERNAL ("Caught exception destroying Iterator" + e);
      }
   }


   public boolean next_n (int how_many, org.omg.CosNaming.BindingListHolder bl)
   {
      int diff = bindings.length - iterator_pos;
      if (diff > 0)
      {
         Binding[] bndgs = null;
         if (how_many <= diff)
         {
            bndgs = new Binding[how_many];
            System.arraycopy (bindings, iterator_pos, bndgs, 0, how_many);
            iterator_pos += how_many;
         }
         else
         {
            bndgs = new Binding[diff];
            System.arraycopy (bindings, iterator_pos, bndgs, 0, diff);
            iterator_pos = bindings.length;
         }
         bl.value = bndgs;
         return true;
      }
      else
      {
         bl.value = new org.omg.CosNaming.Binding[0];
         return false;
      }
   }


   public boolean next_one (org.omg.CosNaming.BindingHolder b)
   {
      if (iterator_pos < bindings.length)
      {
         b.value = bindings[iterator_pos++];
         return true;
      }
      else
      {
         b.value = new Binding (new org.omg.CosNaming.NameComponent[0],
                  org.omg.CosNaming.BindingType.nobject);
         return false;
      }
   }
}