Example usage for java.nio.channels FileChannel transferFrom

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

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Introduction

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

Prototype

public abstract long transferFrom(ReadableByteChannel src, long position, long count) throws IOException;

Source Link

Document

Transfers bytes into this channel's file from the given readable byte channel.

Usage

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.
 *///  ww  w  . j a v  a2  s .c o m
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.github.fritaly.dualcommander.Utils.java

private static void doCopyFile(File srcFile, File destFile, boolean preserveFileDate) throws IOException {
    if (destFile.exists() && destFile.isDirectory()) {
        throw new IOException("Destination '" + destFile + "' exists but is a directory");
    }/*  w  w  w  . j  a  v  a2  s .  com*/

    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();
        long size = input.size();
        long pos = 0;
        long count = 0;
        while (pos < size) {
            count = size - pos > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : size - pos;
            pos += output.transferFrom(input, pos, count);
        }
    } finally {
        IOUtils.closeQuietly(output);
        IOUtils.closeQuietly(fos);
        IOUtils.closeQuietly(input);
        IOUtils.closeQuietly(fis);
    }

    if (srcFile.length() != destFile.length()) {
        throw new IOException("Failed to copy full contents from '" + srcFile + "' to '" + destFile + "'");
    }
    if (preserveFileDate) {
        destFile.setLastModified(srcFile.lastModified());
    }
}

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

/**
 * Internal copy file method./*w  w w. j a  v a 2s.co m*/
 * 
 * @param srcFile the validated source file, must not be <code>null</code>
 * @param destFile the validated destination file, must not be <code>null</code>
 * @param preserveFileDate whether to preserve the file date
 * @throws IOException if an error occurs
 */
private static void doCopyFile(File srcFile, File destFile, boolean preserveFileDate) throws IOException {
    if (destFile.exists() && destFile.isDirectory()) {
        throw new IOException("Destination '" + destFile + "' exists but is a directory");
    }

    FileChannel input = new FileInputStream(srcFile).getChannel();
    try {
        FileChannel output = new FileOutputStream(destFile).getChannel();
        try {
            output.transferFrom(input, 0, input.size());
        } finally {
            closeQuietly(output);
        }
    } finally {
        closeQuietly(input);
    }

    if (srcFile.length() != destFile.length()) {
        throw new IOException("Failed to copy full contents from '" + srcFile + "' to '" + destFile + "'");
    }
    if (preserveFileDate) {
        destFile.setLastModified(srcFile.lastModified());
    }
}

From source file:padl.creator.cppfile.eclipse.plugin.internal.Utils.java

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

    if (!destFile.exists()) {
        destFile.createNewFile();/* ww  w . j  av  a2  s . c o  m*/
    }

    FileChannel source = null;
    FileChannel destination = null;
    try {
        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.remobile.file.LocalFilesystem.java

private static void copyResource(CordovaResourceApi.OpenForReadResult input, OutputStream outputStream)
        throws IOException {
    try {/*from w  ww  .  j  ava 2s  . co m*/
        InputStream inputStream = input.inputStream;
        if (inputStream instanceof FileInputStream && outputStream instanceof FileOutputStream) {
            FileChannel inChannel = ((FileInputStream) input.inputStream).getChannel();
            FileChannel outChannel = ((FileOutputStream) outputStream).getChannel();
            long offset = 0;
            long length = input.length;
            if (input.assetFd != null) {
                offset = input.assetFd.getStartOffset();
            }
            // transferFrom()'s 2nd arg is a relative position. Need to set the absolute
            // position first.
            inChannel.position(offset);
            outChannel.transferFrom(inChannel, 0, length);
        } else {
            final int BUFFER_SIZE = 8192;
            byte[] buffer = new byte[BUFFER_SIZE];

            for (;;) {
                int bytesRead = inputStream.read(buffer, 0, BUFFER_SIZE);

                if (bytesRead <= 0) {
                    break;
                }
                outputStream.write(buffer, 0, bytesRead);
            }
        }
    } finally {
        input.inputStream.close();
        if (outputStream != null) {
            outputStream.close();
        }
    }
}

From source file:org.datavaultplatform.common.io.FileCopy.java

/**
 * Internal copy file method./*from w ww.  j a  v  a2  s.  c  o  m*/
 * 
 * @param progress  the progress tracking object
 * @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
 */
private static void doCopyFile(Progress progress, File srcFile, File destFile, 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();
        long size = input.size();
        long pos = 0;
        long count = 0;
        while (pos < size) {
            count = size - pos > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : size - pos;
            long copied = output.transferFrom(input, pos, count);
            pos += copied;
            progress.byteCount += copied;
            progress.timestamp = System.currentTimeMillis();
        }
    } finally {
        IOUtils.closeQuietly(output);
        IOUtils.closeQuietly(fos);
        IOUtils.closeQuietly(input);
        IOUtils.closeQuietly(fis);
    }

    if (srcFile.length() != destFile.length()) {
        throw new IOException("Failed to copy full contents from '" + srcFile + "' to '" + destFile + "'");
    }
    if (preserveFileDate) {
        destFile.setLastModified(srcFile.lastModified());
    }

    progress.fileCount += 1;
}

From source file:dk.clanie.io.IOUtil.java

/**
 * Creates a copy of a file./*w w w.j  a  v  a2s  .  c  o m*/
 * 
 * If the destination is a directory the file is copied to that directory
 * with the same name as the source file.
 * 
 * @param from
 *            - source File
 * @param to
 *            - destination File
 * @param overwrite
 *            - allow overwriting existing file
 * 
 * @throws RuntimeIOException
 */
@SuppressWarnings("resource")
public static void copyFile(File from, File to, boolean overwrite) throws RuntimeIOException {
    FileChannel inputChannel = null;
    FileChannel outputChannel = null;
    try {
        if (!from.exists())
            throw new RuntimeIOException.FileNotFound(from);
        if (to.isDirectory()) {
            to = new File(to.getPath() + File.separator + from.getName());
        }
        if (to.exists()) {
            if (!overwrite)
                throw new RuntimeIOException.FileAlreadyExists(to);
        } else if (!to.createNewFile())
            throw new RuntimeIOException.FailedToCreate(to);

        inputChannel = new FileInputStream(from).getChannel();
        outputChannel = new FileOutputStream(to).getChannel();
        long size = inputChannel.size();
        long copied = 0L;
        while (copied < size)
            copied += outputChannel.transferFrom(inputChannel, copied, size - copied);
    } catch (java.io.IOException e) {
        throw new RuntimeIOException(e.getMessage(), e);
    } finally {
        closeChannels(inputChannel, outputChannel);
    }
}

From source file:it.geosolutions.tools.io.file.IOUtils.java

/**
 * Optimize version of copy method for file channels.
 * /*from   w  w w.  j  a va2s  .  c  o m*/
 * @param bufferSize
 *            size of the temp buffer to use for this copy.
 * @param source
 *            the source {@link ReadableByteChannel}.
 * @param destination
 *            the destination {@link WritableByteChannel};.
 * @throws IOException
 *             in case something bad happens.
 */
public static void copyFileChannel(int bufferSize, FileChannel source, FileChannel destination)
        throws IOException {

    Objects.notNull(source, destination);
    if (!source.isOpen() || !destination.isOpen())
        throw new IllegalStateException("Source and destination channels must be open.");
    FileLock lock = null;
    try {

        lock = destination.lock();
        final long sourceSize = source.size();
        long pos = 0;
        while (pos < sourceSize) {
            // read and flip
            final long remaining = (sourceSize - pos);
            final int mappedZoneSize = remaining >= bufferSize ? bufferSize : (int) remaining;
            destination.transferFrom(source, pos, mappedZoneSize);
            // update zone
            pos += mappedZoneSize;

        }
    } finally {
        if (lock != null) {
            try {
                lock.release();
            } catch (Throwable t) {
                if (LOGGER.isInfoEnabled())
                    LOGGER.info(t.getLocalizedMessage(), t);
            }
        }

    }
}

From source file:com.parse.ParseFileUtils.java

/**
 * Internal copy file method./*  ww  w.  j  a va2  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:org.lnicholls.galleon.util.Tools.java

public static void copy(File src, File dst) {
    try {/*  www. j a va 2s  .  c o m*/
        FileChannel srcChannel = new FileInputStream(src).getChannel();
        FileChannel dstChannel = new FileOutputStream(dst).getChannel();
        dstChannel.transferFrom(srcChannel, 0, srcChannel.size());
        srcChannel.close();
        srcChannel = null;
        dstChannel.close();
        dstChannel = null;
    } catch (IOException ex) {
        Tools.logException(Tools.class, ex, dst.getAbsolutePath());
    }
}