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/*
* 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 8044289
* @summary Test verifies that when some of the read() and write() methods
* are not able to get stream from createImageInputStream() and
* createImageOutputStream() are we doing null check for stream
* and throwing IOException as per specification.
* @run main NullStreamCheckTest
*/
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.imageio.spi.IIORegistry;
import javax.imageio.spi.ImageInputStreamSpi;
import javax.imageio.spi.ImageOutputStreamSpi;
public class NullStreamCheckTest {
// get ImageIORegistry default instance.
private static final IIORegistry localRegistry = IIORegistry.
getDefaultInstance();
// stream variables needed for input and output.
static LocalOutputStream outputStream = new LocalOutputStream();
static LocalInputStream inputStream = new LocalInputStream();
static final int width = 50, height = 50;
// input and output BufferedImage needed while read and write.
static BufferedImage inputImage = new BufferedImage(width, height,
BufferedImage.TYPE_INT_ARGB);
/* if we catch expected IOException message return
* false otherwise return true.
*/
private static boolean verifyOutputExceptionMessage(IOException ex) {
String message = ex.getMessage();
return (!message.equals("Can't create an ImageOutputStream!"));
}
/* if we catch expected IOException message return
* false otherwise return true.
*/
private static boolean verifyInputExceptionMessage(IOException ex) {
String message = ex.getMessage();
return (!message.equals("Can't create an ImageInputStream!"));
}
private static void verifyFileWrite() throws IOException {
File outputTestFile = File.createTempFile("outputTestFile", ".png");
try {
ImageIO.write(inputImage, "png", outputTestFile);
} catch (IOException ex) {
if (verifyOutputExceptionMessage(ex))
throw ex;
} finally {
outputTestFile.delete();
}
}
private static void verifyStreamWrite() throws IOException {
try {
ImageIO.write(inputImage, "png", outputStream);
} catch (IOException ex) {
if (verifyOutputExceptionMessage(ex))
throw ex;
} finally {
try {
outputStream.close();
} catch (IOException ex) {
throw ex;
}
}
}
private static void verifyFileRead() throws IOException {
File inputTestFile = File.createTempFile("inputTestFile", ".png");
try {
ImageIO.read(inputTestFile);
} catch (IOException ex) {
if (verifyInputExceptionMessage(ex))
throw ex;
} finally {
inputTestFile.delete();
}
}
private static void verifyStreamRead() throws IOException {
try {
ImageIO.read(inputStream);
} catch (IOException ex) {
if (verifyInputExceptionMessage(ex))
throw ex;
} finally {
try {
inputStream.close();
} catch (IOException ex) {
throw ex;
}
}
}
private static void verifyUrlRead() throws IOException {
URL url;
File inputTestUrlFile = File.createTempFile("inputTestFile", ".png");
try {
try {
url = inputTestUrlFile.toURI().toURL();
} catch (MalformedURLException ex) {
throw ex;
}
try {
ImageIO.read(url);
} catch (IOException ex) {
if (verifyInputExceptionMessage(ex))
throw ex;
}
} finally {
inputTestUrlFile.delete();
}
}
public static void main(String[] args) throws IOException,
MalformedURLException {
/* deregister ImageOutputStreamSpi so that we creatImageOutputStream
* returns null while writing.
*/
localRegistry.deregisterAll(ImageOutputStreamSpi.class);
/* verify possible ImageIO.write() scenario's for null stream output
* from createImageOutputStream() API in ImageIO class.
*/
verifyFileWrite();
verifyStreamWrite();
/* deregister ImageInputStreamSpi so that we creatImageInputStream
* returns null while reading.
*/
localRegistry.deregisterAll(ImageInputStreamSpi.class);
/* verify possible ImageIO.read() scenario's for null stream output
* from createImageInputStream API in ImageIO class.
*/
verifyFileRead();
verifyStreamRead();
verifyUrlRead();
}
static class LocalOutputStream extends OutputStream {
@Override
public void write(int i) throws IOException {
}
}
static class LocalInputStream extends InputStream {
@Override
public int read() throws IOException {
return 0;
}
}
}
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