Example usage for java.nio.channels FileChannel size

List of usage examples for java.nio.channels FileChannel size

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Introduction

In this page you can find the example usage for java.nio.channels FileChannel size.

Prototype

public abstract long size() throws IOException;

Source Link

Document

Returns the current size of this channel's file.

Usage

From source file:log4JToXml.xmlToProperties.XmlToLog4jConverterImpl.java

private static void copyFile(File sourceFile, File destFile) throws IOException {

    FileChannel source = null;
    FileChannel destination = null;

    try {//ww  w.  j av  a  2  s  .  com
        source = new FileInputStream(sourceFile).getChannel();
        destination = new FileOutputStream(destFile).getChannel();
        destination.transferFrom(source, 0, source.size());
    } finally {
        if (source != null) {
            source.close();
        }
        if (destination != null) {
            destination.close();
        }
    }
}

From source file:com.parse.ParseFileUtils.java

/**
 * Internal copy file method.// w  w  w. j  av  a 2 s.  co m
 * This caches the original file length, and throws an IOException
 * if the output file length is different from the current input file length.
 * So it may fail if the file changes size.
 * It may also fail with "IllegalArgumentException: Negative size" if the input file is truncated part way
 * through copying the data and the new file size is less than the current position.
 *
 * @param srcFile  the validated source file, must not be {@code null}
 * @param destFile  the validated destination file, must not be {@code null}
 * @param preserveFileDate  whether to preserve the file date
 * @throws IOException if an error occurs
 * @throws IOException if the output file length is not the same as the input file length after the copy completes
 * @throws IllegalArgumentException "Negative size" if the file is truncated so that the size is less than the position
 */
private static void doCopyFile(final File srcFile, final File destFile, final boolean preserveFileDate)
        throws IOException {
    if (destFile.exists() && destFile.isDirectory()) {
        throw new IOException("Destination '" + destFile + "' exists but is a directory");
    }

    FileInputStream fis = null;
    FileOutputStream fos = null;
    FileChannel input = null;
    FileChannel output = null;
    try {
        fis = new FileInputStream(srcFile);
        fos = new FileOutputStream(destFile);
        input = fis.getChannel();
        output = fos.getChannel();
        final long size = input.size(); // TODO See IO-386
        long pos = 0;
        long count = 0;
        while (pos < size) {
            final long remain = size - pos;
            count = remain > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : remain;
            final long bytesCopied = output.transferFrom(input, pos, count);
            if (bytesCopied == 0) { // IO-385 - can happen if file is truncated after caching the size
                break; // ensure we don't loop forever
            }
            pos += bytesCopied;
        }
    } finally {
        ParseIOUtils.closeQuietly(output);
        ParseIOUtils.closeQuietly(fos);
        ParseIOUtils.closeQuietly(input);
        ParseIOUtils.closeQuietly(fis);
    }

    final long srcLen = srcFile.length(); // TODO See IO-386
    final long dstLen = destFile.length(); // TODO See IO-386
    if (srcLen != dstLen) {
        throw new IOException("Failed to copy full contents from '" + srcFile + "' to '" + destFile
                + "' Expected length: " + srcLen + " Actual: " + dstLen);
    }
    if (preserveFileDate) {
        destFile.setLastModified(srcFile.lastModified());
    }
}

From source file:com.liferay.util.FileUtil.java

public static void copyFile(File source, File destination, boolean hardLinks) {
    if (!source.exists()) {
        return;/*  w w  w  . ja  v  a 2s.  com*/
    }

    if (hardLinks && !Config.getBooleanProperty("CONTENT_VERSION_HARD_LINK", true)) {
        hardLinks = false;
    }

    if ((destination.getParentFile() != null) && (!destination.getParentFile().exists())) {

        destination.getParentFile().mkdirs();
    }

    if (hardLinks) {
        // I think we need to be sure to unlink first
        if (destination.exists()) {
            JNALibrary.unlink(destination.getAbsolutePath());
        }

        try {
            JNALibrary.link(source.getAbsolutePath(), destination.getAbsolutePath());
            // setting this means we will try again if we cannot hard link
            if (!destination.exists()) {
                hardLinks = false;
            }
        } catch (IOException e) {
            Logger.error(FileUtil.class, "Can't create hardLink. source: " + source.getAbsolutePath()
                    + ", destination: " + destination.getAbsolutePath());
            // setting this means we will try again if we cannot hard link
            hardLinks = false;
        }

    }
    if (!hardLinks) {
        try {
            FileChannel srcChannel = new FileInputStream(source).getChannel();
            FileChannel dstChannel = new FileOutputStream(destination).getChannel();

            dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

            srcChannel.close();
            dstChannel.close();
        } catch (IOException ioe) {
            Logger.error(FileUtil.class, ioe.getMessage(), ioe);
        }
    }

}

From source file:eu.nubomedia.nubomedia_kurento_health_communicator_android.kc_and_communicator.util.FileUtils.java

public static void copyFile(File src, File dst) throws IOException {
    FileChannel inChannel = new FileInputStream(src).getChannel();
    FileChannel outChannel = new FileOutputStream(dst).getChannel();

    try {//from  ww w  .  ja v  a  2 s  .  c om
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } finally {
        if (inChannel != null)
            inChannel.close();
        if (outChannel != null)
            outChannel.close();
    }
}

From source file:gov.nih.nci.ncicb.tcga.dcc.qclive.common.util.FileCopier.java

/**
 * Copies the contents of a file into a new file in the given directory.  The new file will have the same name as
 * the original file./*  w ww.j  a  v  a 2s . c  o  m*/
 *
 * @param fromFile the file to copy
 * @param deployDirectory the directory in which to copy the file -- if this is not a directory, the new file will
 * be created with this name
 *
 * @return the File that was created
 *
 * @throws IOException if there are I/O errors during reading or writing
 */
public static File copy(final File fromFile, final File deployDirectory) throws IOException {
    // if not a directory, then just use deployDirectory as the filename for the copy
    File destination = deployDirectory;
    if (deployDirectory.isDirectory()) {
        // otherwise use original file's name
        destination = new File(deployDirectory, fromFile.getName());
    }

    FileInputStream fileInputStream = null;
    FileChannel sourceChannel = null;
    FileOutputStream fileOutputStream = null;
    FileChannel destinationChannel = null;

    try {
        //noinspection IOResourceOpenedButNotSafelyClosed
        fileInputStream = new FileInputStream(fromFile);
        //noinspection ChannelOpenedButNotSafelyClosed
        sourceChannel = fileInputStream.getChannel();

        //noinspection IOResourceOpenedButNotSafelyClosed
        fileOutputStream = new FileOutputStream(destination);
        //noinspection ChannelOpenedButNotSafelyClosed
        destinationChannel = fileOutputStream.getChannel();
        final int maxCount = (64 * 1024 * 1024) - (32 * 1024);
        final long size = sourceChannel.size();
        long position = 0;
        while (position < size) {
            position += sourceChannel.transferTo(position, maxCount, destinationChannel);
        }
    } catch (IOException ie) {
        throw new IOException("Failed to copy " + fromFile + " to " + deployDirectory + ".\n Error Details: "
                + ie.toString());
    } finally {
        IOUtils.closeQuietly(fileInputStream);
        IOUtils.closeQuietly(sourceChannel);
        IOUtils.closeQuietly(fileOutputStream);
        IOUtils.closeQuietly(destinationChannel);
    }

    return destination;
}

From source file:com.turn.ttorrent.common.TorrentCreator.java

/**
 * Return the concatenation of the SHA-1 hashes of a file's pieces.
 *
 * <p>/*www .j  a va  2  s .  c  om*/
 * Hashes the given file piece by piece using the default Torrent piece
 * length (see {@link #PIECE_LENGTH}) and returns the concatenation of
 * these hashes, as a string.
 * </p>
 *
 * <p>
 * This is used for creating Torrent meta-info structures from a file.
 * </p>
 *
 * @param file The file to hash.
 */
public /* for testing */ static byte[] hashFiles(Executor executor, List<File> files, long nbytes,
        int pieceLength) throws InterruptedException, IOException {
    int npieces = (int) Math.ceil((double) nbytes / pieceLength);
    byte[] out = new byte[Torrent.PIECE_HASH_SIZE * npieces];
    CountDownLatch latch = new CountDownLatch(npieces);

    ByteBuffer buffer = ByteBuffer.allocate(pieceLength);

    long start = System.nanoTime();
    int piece = 0;
    for (File file : files) {
        logger.info("Hashing data from {} ({} pieces)...",
                new Object[] { file.getName(), (int) Math.ceil((double) file.length() / pieceLength) });

        FileInputStream fis = FileUtils.openInputStream(file);
        FileChannel channel = fis.getChannel();
        int step = 10;

        try {
            while (channel.read(buffer) > 0) {
                if (buffer.remaining() == 0) {
                    buffer.flip();
                    executor.execute(new ChunkHasher(out, piece, latch, buffer));
                    buffer = ByteBuffer.allocate(pieceLength);
                    piece++;
                }

                if (channel.position() / (double) channel.size() * 100f > step) {
                    logger.info("  ... {}% complete", step);
                    step += 10;
                }
            }
        } finally {
            channel.close();
            fis.close();
        }
    }

    // Hash the last bit, if any
    if (buffer.position() > 0) {
        buffer.flip();
        executor.execute(new ChunkHasher(out, piece, latch, buffer));
        piece++;
    }

    // Wait for hashing tasks to complete.
    latch.await();
    long elapsed = System.nanoTime() - start;

    logger.info("Hashed {} file(s) ({} bytes) in {} pieces ({} expected) in {}ms.",
            new Object[] { files.size(), nbytes, piece, npieces, String.format("%.1f", elapsed / 1e6) });

    return out;
}

From source file:com.igormaznitsa.jcp.utils.PreprocessorUtils.java

public static void copyFile(@Nonnull final File source, @Nonnull final File dest,
        final boolean copyFileAttributes) throws IOException {
    assertNotNull("Source is null", source);
    assertNotNull("Destination file is null", dest);

    if (source.isDirectory()) {
        throw new IllegalArgumentException("Source file is directory");
    }/* w  w  w . ja  va  2s .c  o m*/

    if (!dest.getParentFile().exists() && !dest.getParentFile().mkdirs()) {
        throw new IOException("Can't make directory [" + getFilePath(dest.getParentFile()) + ']');
    }

    FileChannel fileSrc = null;
    FileChannel fileDst = null;
    final FileInputStream fileSrcInput = new FileInputStream(source);
    FileOutputStream fileOutput = null;
    try {
        fileSrc = fileSrcInput.getChannel();
        fileOutput = new FileOutputStream(dest);
        fileDst = fileOutput.getChannel();
        long size = fileSrc.size();
        long pos = 0L;
        while (size > 0) {
            final long written = fileSrc.transferTo(pos, size, fileDst);
            pos += written;
            size -= written;
        }
    } finally {
        IOUtils.closeQuietly(fileSrcInput);
        IOUtils.closeQuietly(fileOutput);
        IOUtils.closeQuietly(fileDst);
        IOUtils.closeQuietly(fileSrc);
    }

    if (copyFileAttributes) {
        copyFileAttributes(source, dest);
    }
}

From source file:org.mule.util.FileUtils.java

/** 
 * Try to move a file by renaming with backup attempt by copying/deleting via NIO.
 * Creates intermidiate directories as required.
 *//*  w  w  w . j a v  a2s.com*/
public static boolean moveFileWithCopyFallback(File sourceFile, File destinationFile) {
    // try fast file-system-level move/rename first
    boolean success = sourceFile.renameTo(destinationFile);

    if (!success) {
        // try again using NIO copy
        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            fis = new FileInputStream(sourceFile);
            if (!destinationFile.exists()) {
                FileUtils.createFile(destinationFile.getPath());
            }
            fos = new FileOutputStream(destinationFile);
            FileChannel srcChannel = fis.getChannel();
            FileChannel dstChannel = fos.getChannel();
            dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
            srcChannel.close();
            dstChannel.close();
            success = sourceFile.delete();
        } catch (IOException ioex) {
            // grr!
            success = false;
        } finally {
            IOUtils.closeQuietly(fis);
            IOUtils.closeQuietly(fos);
        }
    }

    return success;
}

From source file:com.ah.ui.actions.home.clientManagement.service.CertificateGenSV.java

@SuppressWarnings("resource")
public static byte[] readFromFile(File file) throws IOException {
    FileChannel fileChannel = new FileInputStream(file).getChannel();
    ByteBuffer bb = ByteBuffer.allocate((int) fileChannel.size());
    fileChannel.read(bb);/*from   w  ww .jav  a  2 s  .  c  o m*/
    fileChannel.close();
    bb.flip();
    byte[] bytes;

    if (bb.hasArray()) {
        bytes = bb.array();
    } else {
        bytes = new byte[bb.limit()];
        bb.get(bytes);
    }

    return bytes;
}

From source file:org.xwoot.xwootUtil.FileUtil.java

/**
 * Copy a file from one location to another.
 * <p>/* w ww  .  j a v  a  2s  .c  om*/
 * If the destination file exists, it will be overridden.
 * 
 * @param sourceFile the file to copy from.
 * @param destinationFile the file to copy to.
 * @throws IOException if the sourceFilePath is not found or other IO problems occur.
 */
public static void copyFile(File sourceFile, File destinationFile) throws IOException {
    // check destination.
    FileUtil.checkDirectoryPath(destinationFile.getParentFile());

    // do the actual copy
    FileChannel sourceChannel = null;
    FileChannel destinationChannel = null;
    try {
        sourceChannel = new FileInputStream(sourceFile).getChannel();
        destinationChannel = new FileOutputStream(destinationFile).getChannel();

        sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
    } catch (IOException e) {
        throw e;
    } finally {
        try {
            if (sourceChannel != null) {
                sourceChannel.close();
            }
            if (destinationChannel != null) {
                destinationChannel.close();
            }
        } catch (IOException e) {
            throw e;
        }
    }
}