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/*
* Copyright (c) 2013, 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 8022632
* @summary Test verifies that SPI of WBMP image reader
* restores the stream position if an IOException
* occurs during processing of image header.
* @run main StreamResetTest
*/
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStreamImpl;
public class StreamResetTest {
public static void main(String[] args) {
IOException expectedException = null;
TestStream iis = new TestStream();
ImageReader wbmp = ImageIO.getImageReadersByFormatName("WBMP").next();
if (wbmp == null) {
System.out.println("No WBMP reader: skip the test");
return;
}
ImageReaderSpi spi = wbmp.getOriginatingProvider();
iis.checkPosition();
try {
spi.canDecodeInput(iis);
} catch (IOException e) {
expectedException = e;
}
if (expectedException == null) {
throw new RuntimeException("Test FAILED: stream was not used");
}
iis.checkPosition();
System.out.println("Test PASSED");
}
private static class TestStream extends ImageInputStreamImpl {
private final int errorPos = 1;
@Override
public int read() throws IOException {
if (streamPos == errorPos) {
throw new IOException("Test exception");
}
streamPos++;
return 0x03;
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
streamPos += len;
return len;
}
public void checkPosition() {
if (streamPos != 0) {
throw new RuntimeException("Test FAILED");
}
}
}
}
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