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/* * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.script.util;import java.util.*; /** * Entry set implementation for Bindings implementations * * @author Mike Grogan * @since 1.6 */public class BindingsEntrySet extends AbstractSet<Map.Entry<String, Object>> {     private BindingsBase base;    private String[] keys;     public BindingsEntrySet(BindingsBase base) {        this.base = base;        keys = base.getNames();    }     public int size() {        return keys.length;    }     public Iterator<Map.Entry<String, Object>> iterator() {        return new BindingsIterator();    }     public class BindingsEntry implements Map.Entry<String, Object> {        private String key;        public BindingsEntry(String key) {            this.key = key;        }         public Object setValue(Object value) {            throw new UnsupportedOperationException();        }         public String getKey() {            return key;        }         public Object getValue() {            return base.get(key);        }     }     public class BindingsIterator implements Iterator<Map.Entry<String, Object>> {         private int current = 0;        private boolean stale = false;         public boolean hasNext() {            return (current < keys.length);        }         public BindingsEntry next() {            stale = false;            return new BindingsEntry(keys[current++]);        }         public void remove() {            if (stale || current == 0) {                throw new IllegalStateException();            }             stale = true;            base.remove(keys[current - 1]);        }     } }