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/*
* Copyright (c) 2022, 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
* @enablePreview
* @bug 8281412
* @summary Test FileChannel::map to MemorySegment with custom file channel
* @run testng/othervm MapToMemorySegmentTest
*/
import java.io.File;
import java.io.IOException;
import java.lang.foreign.Arena;
import java.lang.foreign.MemorySegment;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.nio.channels.FileLock;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import org.testng.annotations.Test;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;
public class MapToMemorySegmentTest {
static Path tempPath;
static {
try {
File file = File.createTempFile("foo", "txt");
file.deleteOnExit();
tempPath = file.toPath();
} catch (IOException ex) {
throw new ExceptionInInitializerError(ex);
}
}
@Test(expectedExceptions = UnsupportedOperationException.class)
public void testCustomFileChannel() throws IOException {
var arena = Arena.ofConfined();
var fc = FileChannel.open(tempPath, StandardOpenOption.WRITE, StandardOpenOption.READ);
var fileChannel = new CustomFileChannel(fc);
try (arena; fileChannel){
fileChannel.map(FileChannel.MapMode.READ_WRITE, 1L, 10L, arena);
}
}
@Test
public void testCustomFileChannelOverride() throws IOException {
var arena = Arena.ofConfined();
var fc = FileChannel.open(tempPath, StandardOpenOption.WRITE, StandardOpenOption.READ);
var fileChannel = new CustomFileChannelOverride(fc);
try (arena; fileChannel){
fileChannel.map(FileChannel.MapMode.READ_WRITE, 1L, 10L, arena);
}
}
static class CustomFileChannel extends FileChannel {
FileChannel fc;
public CustomFileChannel(FileChannel fc) {
this.fc = fc;
}
public int read(ByteBuffer dst) throws IOException {
return fc.read(dst);
}
public long read(ByteBuffer[] dsts, int offset, int length) throws IOException {
return fc.read(dsts, offset, length);
}
public int write(ByteBuffer src) throws IOException {
return fc.write(src);
}
public long write(ByteBuffer[] srcs, int offset, int length) throws IOException {
return fc.write(srcs, offset, length);
}
public long position() throws IOException {
return fc.position();
}
public FileChannel position(long newPosition) throws IOException {
return fc.position(newPosition);
}
public long size() throws IOException {
return fc.size();
}
public FileChannel truncate(long size) throws IOException {
return fc.truncate(size);
}
public void force(boolean metaData) throws IOException {
this.fc.force(metaData);
}
public long transferTo(long position, long count, WritableByteChannel target) throws IOException {
return fc.transferTo(position, count, target);
}
public long transferFrom(ReadableByteChannel src, long position, long count) throws IOException {
return fc.transferFrom(src, position, count);
}
public int read(ByteBuffer dst, long position) throws IOException {
return fc.read(dst, position);
}
public int write(ByteBuffer src, long position) throws IOException {
return fc.write(src, position);
}
public MappedByteBuffer map(MapMode mode, long position, long size) throws IOException {
return fc.map(mode, position, size);
}
public FileLock lock(long position, long size, boolean shared) throws IOException {
return fc.lock(position, size, shared);
}
public FileLock tryLock(long position, long size, boolean shared) throws IOException {
return fc.tryLock(position , size, shared);
}
protected void implCloseChannel() throws IOException {
fc.close();
}
}
static class CustomFileChannelOverride extends CustomFileChannel {
public CustomFileChannelOverride(FileChannel fc) { super(fc); }
@Override
public MemorySegment map(MapMode mode, long offset, long size, Arena arena)
throws IOException, UnsupportedOperationException
{
return fc.map(mode, offset, size, arena);
}
}
}
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