| /* |
| * 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 |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 4414990 4415041 |
| * @summary Checks that the output is flushed properly when using various |
| * ImageOutputStreams and writers |
| */ |
| |
| import java.awt.image.BufferedImage; |
| import java.io.BufferedOutputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| |
| import javax.imageio.ImageIO; |
| import javax.imageio.stream.ImageOutputStream; |
| |
| public class StreamFlush { |
| |
| public static void main(String[] args) throws IOException { |
| ImageIO.setUseCache(true); |
| |
| // Create a FileImageOutputStream from a FileOutputStream |
| File temp1 = File.createTempFile("imageio", ".tmp"); |
| temp1.deleteOnExit(); |
| ImageOutputStream fios = ImageIO.createImageOutputStream(temp1); |
| |
| // Create a FileCacheImageOutputStream from a BufferedOutputStream |
| File temp2 = File.createTempFile("imageio", ".tmp"); |
| temp2.deleteOnExit(); |
| FileOutputStream fos2 = new FileOutputStream(temp2); |
| BufferedOutputStream bos = new BufferedOutputStream(fos2); |
| ImageOutputStream fcios1 = ImageIO.createImageOutputStream(bos); |
| |
| // Create a FileCacheImageOutputStream from a ByteArrayOutputStream |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| ImageOutputStream fcios2 = ImageIO.createImageOutputStream(baos); |
| |
| BufferedImage bi = |
| new BufferedImage(10, 10, BufferedImage.TYPE_3BYTE_BGR); |
| |
| ImageIO.write(bi, "jpg", fios); // No bug, check it anyway |
| ImageIO.write(bi, "png", fcios1); // Bug 4414990 |
| ImageIO.write(bi, "jpg", fcios2); // Bug 4415041 |
| |
| // It should not be necessary to flush any of the streams |
| // If flushing does make a difference, it indicates a bug |
| // in the writer or the stream implementation |
| |
| // Get length of temp1 before and after flushing |
| long file1NoFlushLength = temp1.length(); |
| fios.flush(); |
| long file1FlushLength = temp1.length(); |
| |
| // Get length of temp2 before and after flushing |
| long file2NoFlushLength = temp2.length(); |
| fcios1.flush(); |
| bos.flush(); |
| long file2FlushLength = temp2.length(); |
| |
| byte[] b0 = baos.toByteArray(); |
| int cacheNoFlushLength = b0.length; |
| fcios2.flush(); |
| byte[] b1 = baos.toByteArray(); |
| int cacheFlushLength = b1.length; |
| |
| if (file1NoFlushLength != file1FlushLength) { |
| // throw new RuntimeException |
| System.out.println |
| ("FileImageOutputStream not flushed!"); |
| } |
| |
| if (file2NoFlushLength != file2FlushLength) { |
| // throw new RuntimeException |
| System.out.println |
| ("FileCacheImageOutputStream/BufferedOutputStream not flushed!"); |
| } |
| |
| if (cacheNoFlushLength != cacheFlushLength) { |
| // throw new RuntimeException |
| System.out.println |
| ("FileCacheImageOutputStream/ByteArrayOutputStream not flushed!"); |
| } |
| } |
| } |