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/*
* Copyright (c) 2021, 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
* @library /test/lib
* @build jdk.test.lib.RandomFactory
* @run main TransferTo
* @bug 8272297
* @summary Test FileInputStream.transferTo(FileOutputStream)
* @key randomness
*/
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.Random;
import jdk.test.lib.RandomFactory;
public class TransferTo {
private static int MIN_SIZE = 10_000;
private static int MAX_SIZE_INCR = 100_000_000 - MIN_SIZE;
private static int ITERATIONS = 10;
private static final Random RND = RandomFactory.getRandom();
public static void main(String[] args) throws IOException {
File dir = new File(".");
File in = File.createTempFile("src", ".dat", dir);
in.deleteOnExit();
int length = MIN_SIZE + RND.nextInt(MAX_SIZE_INCR);
byte[] bytes = new byte[length];
try (RandomAccessFile rafi = new RandomAccessFile(in, "rw")) {
rafi.write(bytes);
}
File out = File.createTempFile("dst", ".dat", dir);
out.deleteOnExit();
for (int i = 0; i < ITERATIONS; i++) {
int posIn = RND.nextInt(length);
int posOut = RND.nextInt(MIN_SIZE);
try (RandomAccessFile rafo = new RandomAccessFile(out, "rw")) {
rafo.setLength(posOut);
}
test(in, posIn, out, posOut);
out.delete();
out = File.createTempFile("dst", ".dat", dir);
out.deleteOnExit();
}
}
private static void test(File in, int posIn, File out, int posOut)
throws IOException {
try (FileInputStream fis = new FileInputStream(in)) {
try (FileChannel fci = fis.getChannel()) {
fci.position(posIn);
long size = fci.size();
long length = size - posIn;
int count = Math.toIntExact(length);
try (FileOutputStream fos = new FileOutputStream(out)) {
try (FileChannel fco = fos.getChannel()) {
fco.position(posOut);
long transferred = fis.transferTo(fos);
if (transferred != count)
fail(posIn, size, posOut,
"Transferred " + transferred +
", expected " + count);
if (fci.position() != posIn + count)
fail(posIn, size, posOut,
"Input position " + fci.position() +
", expected " + posIn + count);
if (fco.position() != posOut + count)
fail(posIn, size, posOut,
"Output position " + fco.position() +
", expected " + posOut + count);
byte[] bytesIn = Files.readAllBytes(in.toPath());
byte[] bytesOut = Files.readAllBytes(out.toPath());
if (!Arrays.equals(bytesIn, posIn, posIn + count,
bytesOut, posOut, posOut + count))
fail(posIn, size, posOut, "Contents unequal");
}
}
}
}
}
private static void fail(int posIn, long size, int posOut,
String msg) {
System.out.printf("Failure for posIn %s, size %d, posOut %d%n",
posIn, size, posOut);
throw new RuntimeException(msg);
}
}
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