/*

 * 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 4638365

 * @summary Test FileChannel.transferFrom and transferTo for 4GB files

 * @run testng/timeout=300 Transfer4GBFile

 */

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.io.PrintStream;

import java.io.RandomAccessFile;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.nio.file.StandardOpenOption;

import java.nio.file.FileAlreadyExistsException;

import java.util.concurrent.TimeUnit;

import org.testng.annotations.Test;

public class Transfer4GBFile {

    private static PrintStream err = System.err;

    private static PrintStream out = System.out;

    // Test transferTo with large file

    @Test

    public void xferTest04() throws Exception { // for bug 4638365

        File source = File.createTempFile("blah", null);

        source.deleteOnExit();

        long testSize = ((long)Integer.MAX_VALUE) * 2;

        initTestFile(source, 10);

        RandomAccessFile raf = new RandomAccessFile(source, "rw");

        FileChannel fc = raf.getChannel();

        out.println("  Writing large file...");

        long t0 = System.nanoTime();

        fc.write(ByteBuffer.wrap("Use the source!".getBytes()), testSize - 40);

        long t1 = System.nanoTime();

        out.printf("  Wrote large file in %d ns (%d ms) %n",

            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));

        fc.close();

        raf.close();

        File sink = File.createTempFile("sink", null);

        sink.deleteOnExit();

        FileInputStream fis = new FileInputStream(source);

        FileChannel sourceChannel = fis.getChannel();

        raf = new RandomAccessFile(sink, "rw");

        FileChannel sinkChannel = raf.getChannel();

        long bytesWritten = sourceChannel.transferTo(testSize -40, 10,

                                                     sinkChannel);

        if (bytesWritten != 10) {

            throw new RuntimeException("Transfer test 4 failed " +

                                       bytesWritten);

        }

        sourceChannel.close();

        sinkChannel.close();

        source.delete();

        sink.delete();

    }

    // Test transferFrom with large file

    @Test

    public void xferTest05() throws Exception { // for bug 4638365

        // Create a source file & large sink file for the test

        File source = File.createTempFile("blech", null);

        source.deleteOnExit();

        initTestFile(source, 100);

        // Create the sink file as a sparse file if possible

        File sink = null;

        FileChannel fc = null;

        while (fc == null) {

            sink = File.createTempFile("sink", null);

            // re-create as a sparse file

            sink.delete();

            try {

                fc = FileChannel.open(sink.toPath(),

                                      StandardOpenOption.CREATE_NEW,

                                      StandardOpenOption.WRITE,

                                      StandardOpenOption.SPARSE);

            } catch (FileAlreadyExistsException ignore) {

                // someone else got it

            }

        }

        sink.deleteOnExit();

        long testSize = ((long)Integer.MAX_VALUE) * 2;

        try {

            out.println("  Writing large file...");

            long t0 = System.nanoTime();

            fc.write(ByteBuffer.wrap("Use the source!".getBytes()),

                     testSize - 40);

            long t1 = System.nanoTime();

            out.printf("  Wrote large file in %d ns (%d ms) %n",

            t1 - t0, TimeUnit.NANOSECONDS.toMillis(t1 - t0));

        } catch (IOException e) {

            // Can't set up the test, abort it

            err.println("xferTest05 was aborted.");

            return;

        } finally {

            fc.close();

        }

        // Get new channels for the source and sink and attempt transfer

        FileChannel sourceChannel = new FileInputStream(source).getChannel();

        try {

            FileChannel sinkChannel = new RandomAccessFile(sink, "rw").getChannel();

            try {

                long bytesWritten = sinkChannel.transferFrom(sourceChannel,

                                                             testSize - 40, 10);

                if (bytesWritten != 10) {

                    throw new RuntimeException("Transfer test 5 failed " +

                                               bytesWritten);

                }

            } finally {

                sinkChannel.close();

            }

        } finally {

            sourceChannel.close();

        }

        source.delete();

        sink.delete();

    }

    /**

     * Creates file blah of specified size in bytes.

     */

    private static void initTestFile(File blah, long size) throws Exception {

        if (blah.exists())

            blah.delete();

        FileOutputStream fos = new FileOutputStream(blah);

        BufferedWriter awriter

            = new BufferedWriter(new OutputStreamWriter(fos, "8859_1"));

        for(int i=0; i<size; i++) {

            awriter.write("e");

        }

        awriter.flush();

        awriter.close();

    }

}