117 lines
4.4 KiB
Java
117 lines
4.4 KiB
Java
/*
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* Copyright (c) 2001, 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 4414990 4415041
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* @summary Checks that the output is flushed properly when using various
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* ImageOutputStreams and writers
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*/
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import java.awt.image.BufferedImage;
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import java.io.BufferedOutputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import javax.imageio.ImageIO;
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import javax.imageio.stream.ImageOutputStream;
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public class StreamFlush {
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public static void main(String[] args) throws IOException {
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ImageIO.setUseCache(true);
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// Create a FileImageOutputStream from a FileOutputStream
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File temp1 = File.createTempFile("StreamFlush_fis_", ".tmp");
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// Create a FileCacheImageOutputStream from a BufferedOutputStream
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File temp2 = File.createTempFile("StreamFlush_bos_", ".tmp");
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try (ImageOutputStream fios = ImageIO.createImageOutputStream(temp1);
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FileOutputStream fos2 = new FileOutputStream(temp2)) {
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test(temp1, fios, temp2, fos2);
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} finally {
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Files.delete(Paths.get(temp1.getAbsolutePath()));
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Files.delete(Paths.get(temp2.getAbsolutePath()));
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}
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}
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private static void test(File temp1, ImageOutputStream fios, File temp2,
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FileOutputStream fos2) throws IOException {
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BufferedOutputStream bos = new BufferedOutputStream(fos2);
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ImageOutputStream fcios1 = ImageIO.createImageOutputStream(bos);
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// Create a FileCacheImageOutputStream from a ByteArrayOutputStream
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ImageOutputStream fcios2 = ImageIO.createImageOutputStream(baos);
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BufferedImage bi =
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new BufferedImage(10, 10, BufferedImage.TYPE_3BYTE_BGR);
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ImageIO.write(bi, "jpg", fios); // No bug, check it anyway
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ImageIO.write(bi, "png", fcios1); // Bug 4414990
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ImageIO.write(bi, "jpg", fcios2); // Bug 4415041
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// It should not be necessary to flush any of the streams
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// If flushing does make a difference, it indicates a bug
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// in the writer or the stream implementation
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// Get length of temp1 before and after flushing
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long file1NoFlushLength = temp1.length();
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fios.flush();
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long file1FlushLength = temp1.length();
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// Get length of temp2 before and after flushing
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long file2NoFlushLength = temp2.length();
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fcios1.flush();
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bos.flush();
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long file2FlushLength = temp2.length();
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byte[] b0 = baos.toByteArray();
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int cacheNoFlushLength = b0.length;
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fcios2.flush();
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byte[] b1 = baos.toByteArray();
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int cacheFlushLength = b1.length;
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if (file1NoFlushLength != file1FlushLength) {
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// throw new RuntimeException
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System.out.println
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("FileImageOutputStream not flushed!");
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}
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if (file2NoFlushLength != file2FlushLength) {
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// throw new RuntimeException
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System.out.println
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("FileCacheImageOutputStream/BufferedOutputStream not flushed!");
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}
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if (cacheNoFlushLength != cacheFlushLength) {
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// throw new RuntimeException
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System.out.println
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("FileCacheImageOutputStream/ByteArrayOutputStream not flushed!");
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}
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}
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}
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