/*

 * Copyright (c) 2003, 2017, 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 4892682 4892698

 * @summary Tests that the appropriate IllegalStateException is thrown if

 *          ImageReader.read() or ImageWriter.write() is called without having

 *          first set the input/output stream

 */

import java.awt.image.BufferedImage;

import java.util.Iterator;

import javax.imageio.ImageReader;

import javax.imageio.ImageWriter;

import javax.imageio.spi.IIORegistry;

import javax.imageio.spi.ImageReaderSpi;

import javax.imageio.spi.ImageWriterSpi;

public class NullInputOutput {

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

        IIORegistry registry = IIORegistry.getDefaultInstance();

        // test ImageReader.read() for all available ImageReaders

        Iterator readerspis = registry.getServiceProviders(ImageReaderSpi.class,

                                                           false);

        while (readerspis.hasNext()) {

            ImageReaderSpi readerspi = (ImageReaderSpi)readerspis.next();

            ImageReader reader = readerspi.createReaderInstance();

            try {

                reader.read(0);

            } catch (IllegalStateException ise) {

                // caught exception, everything's okay

            }

        }

        // test ImageWriter.write() for all available ImageWriters

        BufferedImage bi = new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);

        Iterator writerspis = registry.getServiceProviders(ImageWriterSpi.class,

                                                           false);

        while (writerspis.hasNext()) {

            ImageWriterSpi writerspi = (ImageWriterSpi)writerspis.next();

            ImageWriter writer = writerspi.createWriterInstance();

            try {

                writer.write(bi);

            } catch (IllegalStateException ise) {

                // caught exception, everything's okay

            }

        }

    }

}