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    1   /*
    2    * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   
   26   /*
   27    * Licensed Materials - Property of IBM
   28    * RMI-IIOP v1.0
   29    * Copyright IBM Corp. 1998 1999  All Rights Reserved
   30    *
   31    */
   32   
   33   package com.sun.corba.se.impl.util;
   34   
   35   import java.util.Dictionary;
   36   import java.util.Enumeration;
   37   import java.util.NoSuchElementException;
   38   
   39   /**
   40    * A hashtable enumerator class.  This class should remain opaque
   41    * to the client. It will use the Enumeration interface.
   42    */
   43   class IdentityHashtableEnumerator implements Enumeration {
   44       boolean keys;
   45       int index;
   46       IdentityHashtableEntry table[];
   47       IdentityHashtableEntry entry;
   48   
   49       IdentityHashtableEnumerator(IdentityHashtableEntry table[], boolean keys) {
   50           this.table = table;
   51           this.keys = keys;
   52           this.index = table.length;
   53       }
   54   
   55       public boolean hasMoreElements() {
   56           if (entry != null) {
   57               return true;
   58           }
   59           while (index-- > 0) {
   60               if ((entry = table[index]) != null) {
   61                   return true;
   62               }
   63           }
   64           return false;
   65   }
   66   
   67   public Object nextElement() {
   68       if (entry == null) {
   69           while ((index-- > 0) && ((entry = table[index]) == null));
   70       }
   71       if (entry != null) {
   72               IdentityHashtableEntry e = entry;
   73           entry = e.next;
   74           return keys ? e.key : e.value;
   75       }
   76           throw new NoSuchElementException("IdentityHashtableEnumerator");
   77       }
   78   }

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