/*

 * Copyright (c) 2016, 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.

 *

 * 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.

 */

/*

 * @test

 * @bug     8167281

 * @summary Test verifies that accessing nth item in NodeList doesn't throw

 *          IndexOutOfBoundsException.

 * @run     main NthItemNodeListTest

 */

import java.awt.image.BufferedImage;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.imageio.ImageReader;

import javax.imageio.metadata.IIOMetadata;

import javax.imageio.metadata.IIOMetadataFormatImpl;

import javax.imageio.stream.ImageInputStream;

import javax.imageio.stream.MemoryCacheImageInputStream;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

public class NthItemNodeListTest {

    public static void main(String[] args) throws IOException {

        // Generate some trivial image and save it to a temporary array

        ByteArrayOutputStream tmp = new ByteArrayOutputStream();

        ImageIO.write(new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB),

                "gif", tmp);

        // Read it back in

        ImageInputStream in = new MemoryCacheImageInputStream(

                new ByteArrayInputStream(tmp.toByteArray()));

        ImageReader reader = ImageIO.getImageReaders(in).next();

        reader.setInput(in);

        // Retrieve standard image metadata tree

        IIOMetadata meta = reader.getImageMetadata(0);

        if (meta == null || !meta.isStandardMetadataFormatSupported()) {

            throw new Error("Test failure: Missing metadata");

        }

        Element root = (Element) meta.

                getAsTree(IIOMetadataFormatImpl.standardMetadataFormatName);

        NodeList nodeList = root.

                getElementsByTagName(root.getFirstChild().getNodeName());

        /*

         * Accessing the nth node should return null and not throw

         * IndexOutOfBoundsException.

         */

        Node n = (nodeList.item(nodeList.getLength()));

    }

}