ImageReaderReadAll.java

/*
 * Copyright (c) 2001, 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
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 * questions.
 */

/*
 * @test
 * @bug 4450319
 * @summary Checks that ImageReader.readAll(int, ImageReadParam) makes use of
 *          the ImageReadParam object
 */

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.Vector;

import javax.imageio.IIOImage;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.MemoryCacheImageInputStream;

public class ImageReaderReadAll {

    private final static byte[] ba = {};

    public static void main(String argv[]) {
        ImageReader ireader;
        ImageReadParam irp;
        IIOImage image;
        BufferedImage bi;
        BufferedImage bi_1;
        BufferedImage bi_2;

        ireader = new DummyImageReaderImpl(null);
        MemoryCacheImageInputStream mciis = new MemoryCacheImageInputStream
            (new ByteArrayInputStream(ba));
        ireader.setInput(mciis);

        irp = new ImageReadParam();
        irp.setDestination(new BufferedImage(10, 10,
                                             BufferedImage.TYPE_3BYTE_BGR));
        try {
            image = ireader.readAll(0, irp);
            bi_1 = ireader.read(0, irp);
            bi_2 = ireader.read(0);
        } catch (java.io.IOException ee) {
            throw new RuntimeException("Unexpected exception: " + ee);
        }

        bi = (BufferedImage)image.getRenderedImage();
        if (bi.getType() != bi_1.getType()) {
            throw new RuntimeException("Images have different type!");
        }
    }


    public static class DummyImageReaderImpl extends ImageReader {

        public DummyImageReaderImpl(ImageReaderSpi originatingProvider) {
            super(originatingProvider);
        }

        public BufferedImage read(int imageIndex, ImageReadParam param)
          throws IOException {
            if (input == null)
                throw new IllegalStateException();
            if (imageIndex >= 1 || imageIndex < 0)
                throw new IndexOutOfBoundsException();
            if (seekForwardOnly) {
                if (imageIndex < minIndex)
                    throw new IndexOutOfBoundsException();
                minIndex = imageIndex;
            }

            return getDestination(param, getImageTypes(imageIndex), 10, 15);
        }

        public Iterator getImageTypes(int imageIndex) throws IOException {
            if (input == null)
                throw new IllegalStateException();
            if (imageIndex >= 1 || imageIndex < 0)
                throw new IndexOutOfBoundsException();

            Vector imageTypes = new Vector();
            imageTypes.add(ImageTypeSpecifier.createFromBufferedImageType
                           (BufferedImage.TYPE_BYTE_GRAY ));
            return imageTypes.iterator();
        }

        public int getNumImages(boolean allowSearch) throws IOException {return 1;}
        public int getWidth(int imageIndex) throws IOException {return 1;}
        public int getHeight(int imageIndex) throws IOException {return 1;}
        public IIOMetadata getStreamMetadata() throws IOException {return null;}
        public IIOMetadata getImageMetadata(int imageIndex)
          throws IOException {return null;}
    }
}