/*
 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
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package com.oracle.truffle.js.nodes.access;

import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.js.nodes.JavaScriptBaseNode;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.objects.IteratorRecord;

ES6 7.4.5 IteratorStep(iterator).
/**
 * ES6 7.4.5 IteratorStep(iterator).
 */
public class IteratorStepNode extends JavaScriptBaseNode {
    @Child private IteratorNextNode iteratorNextNode;
    @Child private IteratorCompleteNode iteratorCompleteNode;

    protected IteratorStepNode(JSContext context) {
        this.iteratorNextNode = IteratorNextNode.create();
        this.iteratorCompleteNode = IteratorCompleteNode.create(context);
    }

    public static IteratorStepNode create(JSContext context) {
        return new IteratorStepNode(context);
    }

    public Object execute(IteratorRecord iteratorRecord) {
        DynamicObject result = iteratorNextNode.execute(iteratorRecord);
        Object done = iteratorCompleteNode.execute(result);
        if (done == Boolean.TRUE) {
            return false;
        }
        return result;
    }
}