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

   1: /* RmiNamingEnumeration.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.util.NoSuchElementException;
  42: 
  43: import javax.naming.NamingEnumeration;
  44: import javax.naming.NamingException;
  45: 
  46: /**
  47:  * Iterates over name class pairs, obtaining values first from the binding list
  48:  * and then from the binding iterator.
  49:  *
  50:  * @author Audrius Meskauskas
  51:  */
  52: public abstract class RmiNamingEnumeration implements NamingEnumeration
  53: {
  54:   /**
  55:    * The array of bindings, returned at once.
  56:    */
  57:   String[] list;
  58: 
  59:   /**
  60:    * The position of the element in the binding list, that must be returned
  61:    * during the subsequent call of the next(). If this field is grater or equal
  62:    * to the lenght of the list, the subsequent values must be requested from the
  63:    * iterator.
  64:    */
  65:   int p;
  66: 
  67:   RmiNamingEnumeration(String[] bindingList)
  68:   {
  69:     list = bindingList;
  70:   }
  71: 
  72:   /**
  73:    * Convert from the CORBA binding into that this enumeration should return.
  74:    *
  75:    * @param binding
  76:    *          the binding to convert
  77:    * @return the value, that must be returned by the {@link #next()}.
  78:    */
  79:   public abstract Object convert(String binding);
  80: 
  81:   /**
  82:    * Checks if there are more elements to return.
  83:    *
  84:    * @throws NamingException
  85:    *           never
  86:    */
  87:   public boolean hasMore() throws NamingException
  88:   {
  89:     return hasMoreElements();
  90:   }
  91: 
  92:   /**
  93:    * Returns the next element.
  94:    *
  95:    * @throws NamingException
  96:    *           never
  97:    */
  98:   public Object next() throws NamingException
  99:   {
 100:     return nextElement();
 101:   }
 102: 
 103:   /**
 104:    * Checks if there are more elements to return.
 105:    */
 106:   public boolean hasMoreElements()
 107:   {
 108:     return p < list.length;
 109:   }
 110: 
 111:   /**
 112:    * Returns the next element.
 113:    */
 114:   public Object nextElement()
 115:   {
 116:     if (p < list.length)
 117:       return convert(list[p++]);
 118:     else
 119:       throw new NoSuchElementException();
 120:   }
 121: 
 122:   /**
 123:    * Nothing to do in this method.
 124:    */
 125:   public void close()
 126:   {
 127:     // Nothing to do here.
 128:   }
 129: 
 130: }