Source for gnu.javax.naming.jndi.url.rmi.ListBindingsEnumeration

   1: /* ListBindingsEnumeration.java -- handles rmi: urls
   2:    Copyright (C) 2006 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.javax.naming.jndi.url.rmi;
  40: 
  41: import java.rmi.registry.Registry;
  42: 
  43: import javax.naming.NamingEnumeration;
  44: 
  45: /**
  46:  * Iterates over bindings, obtaining values first from the binding list and then
  47:  * from the binding iterator.
  48:  *
  49:  * @author Audrius Meskauskas
  50:  */
  51: public class ListBindingsEnumeration extends RmiNamingEnumeration implements
  52:     NamingEnumeration
  53: {
  54:   /**
  55:    * The naming service, to resolve the objects.
  56:    */
  57:   Registry service;
  58: 
  59:   /**
  60:    * Create the new enumeration
  61:    *
  62:    * @param bindings
  63:    *          the list of the bound names
  64:    * @param aService
  65:    *          the RMI naming service, used to get the bound values.
  66:    */
  67:   public ListBindingsEnumeration(String [] bindings,
  68:                                  Registry aService)
  69:   {
  70:     super(bindings);
  71:     service = aService;
  72:   }
  73: 
  74:   /**
  75:    * Convert from the CORBA binding into the javax.naming binding. As the CORBA
  76:    * naming service binding does not contain the object itself, this method
  77:    * makes the additional calls to the naming service.
  78:    *
  79:    * @param binding
  80:    *          the binding to convert
  81:    * @return the value, that must be returned by the {@link #next()}.
  82:    */
  83:   public Object convert(String binding)
  84:   {
  85:     try
  86:       {
  87:         Object object = service.lookup(binding);
  88:         return new javax.naming.Binding(binding, object);
  89:       }
  90:     catch (Exception e)
  91:       {
  92:         // Probably was removed by the concurent thread.
  93:         return null;
  94:       }
  95:   }
  96: 
  97: }