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/*
* 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 4417672 4422328
* @summary Checks the functionality of MemoryCacheImageOutputStream
* particularly with regard to seeking and flushing
*/
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.imageio.stream.ImageOutputStream;
import javax.imageio.stream.MemoryCacheImageOutputStream;
public class MemoryCacheImageOutputStreamTest {
public static void main(String[] args) throws IOException {
try {
MemoryCacheImageOutputStream stream =
new MemoryCacheImageOutputStream(new ByteArrayOutputStream());
stream.write(0); // or write anything, for that matter
stream.flush();
} catch (Exception e) {
throw new RuntimeException("Error flushing stream: " + e);
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
ImageOutputStream ios = new MemoryCacheImageOutputStream(os);
byte[] b = new byte[30*256];
byte byteVal = (byte)0;
for (int i = 0; i < b.length; i++) {
b[i] = byteVal++;
}
// Write 261,120 bytes
for (int i = 0; i < 34; i++) {
ios.write(b);
}
// Scatter 256 values at positions 1000, 2000, ...
// Using both write(int) and write(byte[])
byte[] buf = new byte[1];
for (int i = 0; i < 256; i += 2) {
ios.seek(1000*i);
ios.write(i);
ios.seek(1000*(i + 1));
buf[0] = (byte)(i + 1);
ios.write(buf);
}
// Re-read scattered values
for (int i = 0; i < 256; i++) {
ios.seek(1000*i);
int val = ios.read();
if (val != i) {
System.out.println("Got bad value (1) at pos = " + (1000*i));
}
}
// Discard two buffers and re-read scattered values
ios.flushBefore(2*8192);
for (int i = 0; i < 256; i++) {
long pos = 1000*i;
if (pos >= 2*8192) {
ios.seek(pos);
int val = ios.read();
if (val != i) {
System.out.println("Got bad value (2) at pos = " + (1000*i));
}
}
}
ios.close();
byte[] data = os.toByteArray();
for (int i = 0; i < data.length; i++) {
byte val = data[i];
if ((i < 256000) && (i % 1000) == 0) {
if (val != (byte)(i/1000)) {
System.out.println("Got bad value (3) at pos = " + i);
}
} else {
byte gval = (byte)((i % (30*256)) % 256);
if (val != gval) {
System.out.println("Got bad value (4) at pos = " + i +
"(got " + (val & 0xff) +
" wanted " + (gval & 0xff) +")");
}
}
}
}
}
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