/*
* 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]);
}
}
}