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    1   /*
    2    * Copyright (c) 2005, 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   package com.sun.script.util;
   27   import java.util;
   28   
   29   /**
   30    * Entry set implementation for Bindings implementations
   31    *
   32    * @author Mike Grogan
   33    * @since 1.6
   34    */
   35   public class BindingsEntrySet extends AbstractSet<Map.Entry<String, Object>> {
   36   
   37       private BindingsBase base;
   38       private String[] keys;
   39   
   40       public BindingsEntrySet(BindingsBase base) {
   41           this.base = base;
   42           keys = base.getNames();
   43       }
   44   
   45       public int size() {
   46           return keys.length;
   47       }
   48   
   49       public Iterator<Map.Entry<String, Object>> iterator() {
   50           return new BindingsIterator();
   51       }
   52   
   53       public class BindingsEntry implements Map.Entry<String, Object> {
   54           private String key;
   55           public BindingsEntry(String key) {
   56               this.key = key;
   57           }
   58   
   59           public Object setValue(Object value) {
   60               throw new UnsupportedOperationException();
   61           }
   62   
   63           public String getKey() {
   64               return key;
   65           }
   66   
   67           public Object getValue() {
   68               return base.get(key);
   69           }
   70   
   71       }
   72   
   73       public class BindingsIterator implements Iterator<Map.Entry<String, Object>> {
   74   
   75           private int current = 0;
   76           private boolean stale = false;
   77   
   78           public boolean hasNext() {
   79               return (current < keys.length);
   80           }
   81   
   82           public BindingsEntry next() {
   83               stale = false;
   84               return new BindingsEntry(keys[current++]);
   85           }
   86   
   87           public void remove() {
   88               if (stale || current == 0) {
   89                   throw new IllegalStateException();
   90               }
   91   
   92               stale = true;
   93               base.remove(keys[current - 1]);
   94           }
   95   
   96       }
   97   
   98   }

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