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/*
* Copyright (c) 2010, 2013, 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 jdk.nashorn.internal.runtime.arrays;
import java.util.NoSuchElementException;
import jdk.nashorn.internal.runtime.JSType;
import jdk.nashorn.internal.runtime.ScriptObject;
/**
* Iterator over a map
*/
class MapIterator extends ArrayLikeIterator<Object> {
protected final ScriptObject obj;
private final long length;
MapIterator(final ScriptObject obj, final boolean includeUndefined) {
super(includeUndefined);
this.obj = obj;
this.length = JSType.toUint32(obj.getLength());
this.index = 0;
}
protected boolean indexInArray() {
return index < length;
}
@Override
public int getLength() {
return (int) length;
}
@Override
public boolean hasNext() {
if (length == 0L) {
return false; //return empty string if toUint32(length) == 0
}
while (indexInArray()) {
if (obj.has(index) || includeUndefined) {
break;
}
bumpIndex();
}
return indexInArray();
}
@Override
public Object next() {
if (indexInArray()) {
return obj.get(bumpIndex());
}
throw new NoSuchElementException();
}
}
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