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/* mulitdirectbufferIO.java -- Scatter/Gather IO using direct buffers
Copyright (C) 2006 Michael Barker
This file is part of Mauve.
Mauve is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
Mauve 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 for more details.
You should have received a copy of the GNU General Public License
along with Mauve; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
// Tags: JDK14
package gnu.testlet.java.nio.channels.FileChannel;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.Arrays;
/**
* @author mike
*/
public class multidirectbufferIO
implements Testlet
{
private void initBuffer(ByteBuffer[] bs, byte[] data)
{
for (int i = 0; i < bs.length; i++)
{
bs[i] = ByteBuffer.allocateDirect(data.length);
bs[i].put(data);
bs[i].flip();
}
}
/*
* (non-Javadoc)
*
* @see gnu.testlet.Testlet#test(gnu.testlet.TestHarness)
*/
public void test(TestHarness harness)
{
final int BUF_LEN = 17;
final int MAX_BUFFERS = 16;
byte[] data = "qwertyuiopasdfghjklzxcvbnm".getBytes();
ByteBuffer[] out = new ByteBuffer[BUF_LEN];
ByteBuffer[] in = new ByteBuffer[BUF_LEN];
initBuffer(out, data);
initBuffer(in, new byte[data.length]);
String tmpfile = harness.getTempDirectory() + File.separator
+ "mauve-multibuffer.tmp";
try
{
File f = new File(tmpfile);
f.createNewFile();
FileChannel fcOut = new FileOutputStream(f).getChannel();
long numWritten = fcOut.write(out);
fcOut.close();
/* The SUN JDK limits the number of buffers to 16 */
harness.check(numWritten, (MAX_BUFFERS * data.length));
for (int i = 0; i < MAX_BUFFERS; i++)
{
harness.check(out[i].position() == out[i].limit(), "Position - Limit mismatch");
}
FileChannel fcIn = new FileInputStream(f).getChannel();
long numRead = fcIn.read(in);
/* The SUN JDK limits the number of buffers to 16 */
harness.check(numRead, (16 * data.length));
for (int i = 0; i < MAX_BUFFERS; i++)
{
byte[] dIn = new byte[data.length];
byte[] dOut = new byte[data.length];
in[i].flip();
out[i].flip();
in[i].get(dIn);
out[i].get(dOut);
harness.check(Arrays.equals(dIn, dOut));
}
f.delete();
}
catch (IOException e)
{
harness.fail("Unexpected exception: " + e);
}
}
}
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