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:com.marklogic.client.functionaltest.BasicJavaClientREST.java

/**
 * Copy Files from One location to Other
 * @param Source File//from w  ww.  j  a  v a  2  s  .  co  m
 * @param target File
 * @param Boolean Value
 * @throws FileNotFoundException
 */
public void copyWithChannels(File aSourceFile, File aTargetFile, boolean aAppend) {
    //log("Copying files with channels.");
    //ensureTargetDirectoryExists(aTargetFile.getParentFile());
    FileChannel inChannel = null;
    FileChannel outChannel = null;
    FileInputStream inStream = null;
    FileOutputStream outStream = null;
    try {
        try {
            inStream = new FileInputStream(aSourceFile);
            inChannel = inStream.getChannel();
            outStream = new FileOutputStream(aTargetFile, aAppend);
            outChannel = outStream.getChannel();
            long bytesTransferred = 0;
            //defensive loop - there's usually only a single iteration :
            while (bytesTransferred < inChannel.size()) {
                bytesTransferred += inChannel.transferTo(0, inChannel.size(), outChannel);
            }
        } finally {
            //being defensive about closing all channels and streams 
            if (inChannel != null)
                inChannel.close();
            if (outChannel != null)
                outChannel.close();
            if (inStream != null)
                inStream.close();
            if (outStream != null)
                outStream.close();
        }
    } catch (FileNotFoundException ex) {
        System.out.println("File not found: " + ex);
    } catch (IOException ex) {
        System.out.println(ex);
    }
}

From source file:com.cisco.dvbu.ps.common.util.CommonUtils.java

/**
 * The copyFile method is used to copy files from a source to a destination folder.
 * //from ww w  .j a v a 2 s .c o  m
 * @param fromFilePath
 * @param toFilePath
 * @throws ValidationException
 */
public static void copyFile(String fromFilePath, String toFilePath, boolean forceCopy)
        throws ValidationException {

    FileChannel srcChannel = null;
    FileChannel dstChannel = null;
    boolean fileExists = fileExists(toFilePath);

    if (forceCopy && fileExists) {
        removeFile(toFilePath);
        fileExists = fileExists(toFilePath);
    }

    if ((!fileExists) || (forceCopy && fileExists)) {
        try {
            // Create channel on the source
            srcChannel = new FileInputStream(fromFilePath).getChannel();

            // Create channel on the destination
            dstChannel = new FileOutputStream(toFilePath).getChannel();

            // Force the copy - added to overcome copy error
            dstChannel.force(true);

            // Copy file contents from source to destination
            dstChannel.transferFrom(srcChannel, 0, srcChannel.size());

        } catch (IOException e) {
            String message = "Could not copy file " + fromFilePath + ".An error was encountered: "
                    + e.toString();
            throw new ValidationException(message, e);
        } finally {
            try {
                // Close the channels
                if (srcChannel != null)
                    srcChannel.close();
                if (dstChannel != null)
                    dstChannel.close();
                srcChannel = null;
                dstChannel = null;
            } catch (IOException e) {
                String message = "Could not copy file " + fromFilePath
                        + ".  Error encountered while closing source and destination channels: " + e.toString();
                throw new ValidationException(message, e);
            }
        }
    }
}

From source file:com.ezac.gliderlogs.FlightOverviewActivity.java

@SuppressLint("SimpleDateFormat")
public void GliderLogToDB(String DBPath, String DB, String device) {
    // format date
    SimpleDateFormat TSD = new SimpleDateFormat("yyyyMMdd_kkss");
    SimpleDateFormat DIR = new SimpleDateFormat("yyyy/MM_dd");
    Date myDate = new Date();
    String backupDBPath = device + "_" + TSD.format(myDate);
    String TS_DIR = DIR.format(myDate);
    // to internal sdcard
    File dir = new File(Environment.getExternalStorageDirectory() + "/Download/" + TS_DIR);
    if (!dir.exists() || !dir.isDirectory()) {
        dir.mkdir();/*from  w  w w.  j  a v  a 2s.c  o  m*/
    }
    File data = Environment.getDataDirectory();
    // create a file channel object
    FileChannel src = null;
    FileChannel des = null;
    File currentDB = new File(data + "/data/" + DBPath + "/databases/", DB);
    File backupDB = new File(dir, backupDBPath);
    try {
        backupDB.delete();
        src = new FileInputStream(currentDB).getChannel();
        des = new FileOutputStream(backupDB).getChannel();
        des.transferFrom(src, 0, src.size());
        src.close();
        des.close();
    } catch (IOException e) {
        Log.d(TAG, e.toString());
        e.printStackTrace();
    }
}

From source file:com.tandong.sa.aq.AbstractAQuery.java

/**
 * Create a temporary file on EXTERNAL storage (sdcard) that holds the cached content of the url.
 * Returns null if url is not cached, or the system cannot create such file (sdcard is absent, such as in emulator).
 * /*  w  w  w .j av a 2  s .co m*/
 * The returned file is accessable to all apps, therefore it is ideal for sharing content (such as photo) via the intent mechanism.
 * 
 * <br>
 * <br>
 * Example Usage:
 * 
 * <pre>
 *   Intent intent = new Intent(Intent.ACTION_SEND);
 *   intent.setType("image/jpeg");
 *   intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
 *   startActivityForResult(Intent.createChooser(intent, "Share via:"), 0);
 * </pre>
 * 
 * <br>
 * The temp file will be deleted when AQUtility.cleanCacheAsync is invoked, or the file can be explicitly deleted after use.
 * 
 * @param url The url of the desired cached content.
 * @param filename The desired file name, which might be used by other apps to describe the content, such as an email attachment.
 * @return temp file
 * 
 */

public File makeSharedFile(String url, String filename) {

    File file = null;

    try {

        File cached = getCachedFile(url);

        if (cached != null) {

            File temp = AQUtility.getTempDir();

            if (temp != null) {

                file = new File(temp, filename);
                file.createNewFile();

                FileChannel ic = new FileInputStream(cached).getChannel();
                FileChannel oc = new FileOutputStream(file).getChannel();
                try {
                    ic.transferTo(0, ic.size(), oc);
                } finally {
                    if (ic != null)
                        ic.close();
                    if (oc != null)
                        oc.close();
                }

            }
        }

    } catch (Exception e) {
        AQUtility.debug(e);
    }

    return file;
}

From source file:com.shinymayhem.radiopresets.ServiceRadioPlayer.java

public void copyLog() {
    //String path = Environment.getExternalStorageDirectory().getAbsolutePath();
    String path = getExternalFilesDir(null).getAbsolutePath();

    File src = getFileStreamPath(ActivityLogger.LOG_FILENAME);
    File dst = new File(path + File.separator + ActivityLogger.LOG_FILENAME);
    try {/*from  w ww  .ja va  2s .  c  o  m*/
        if (dst.createNewFile()) {
            if (LOCAL_LOGV)
                log("sd file created", "v");
        } else {
            if (LOCAL_LOGV)
                log("sd file exists?", "v");
        }
    } catch (IOException e2) {
        log("sd file error", "e");
        Toast.makeText(this, "sd file error", Toast.LENGTH_SHORT).show();
        e2.printStackTrace();
    }

    FileChannel in = null;
    FileChannel out = null;
    try {
        in = new FileInputStream(src).getChannel();
    } catch (FileNotFoundException e1) {
        log("in file not found", "e");
        Toast.makeText(this, "in file not found", Toast.LENGTH_SHORT).show();
        e1.printStackTrace();
    }
    try {
        out = new FileOutputStream(dst).getChannel();
    } catch (FileNotFoundException e1) {
        log("out file not found", "e");
        Toast.makeText(this, "out file not found", Toast.LENGTH_SHORT).show();
        e1.printStackTrace();
    }

    try {
        in.transferTo(0, in.size(), out);
        if (LOCAL_LOGD)
            log("log file copied to " + path + File.separator + ActivityLogger.LOG_FILENAME, "d");
        if (in != null) {
            in.close();
        }
        if (out != null) {
            out.close();
        }
        clearLog();
    } catch (IOException e) {
        log("error copying log file", "e");
        Toast.makeText(this, "error copying log file", Toast.LENGTH_SHORT).show();
        if (LOCAL_LOGV)
            e.printStackTrace();
    } finally {

    }
}

From source file:com.androidquery.AbstractAQuery.java

/**
 * Create a temporary file on EXTERNAL storage (sdcard) that holds the cached content of the url.
 * Returns null if url is not cached, or the system cannot create such file (sdcard is absent, such as in emulator).
 * /*from   w w w .j a  va 2 s. com*/
 * The returned file is accessable to all apps, therefore it is ideal for sharing content (such as photo) via the intent mechanism.
 * 
 * <br>
 * <br>
 * Example Usage:
 * 
 * <pre>
 *   Intent intent = new Intent(Intent.ACTION_SEND);
 *   intent.setType("image/jpeg");
 *   intent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
 *   startActivityForResult(Intent.createChooser(intent, "Share via:"), 0);
 * </pre>
 * 
 * <br>
 * The temp file will be deleted when AQUtility.cleanCacheAsync is invoked, or the file can be explicitly deleted after use.
 * 
 * @param url The url of the desired cached content.
 * @param filename The desired file name, which might be used by other apps to describe the content, such as an email attachment.
 * @return temp file
 * 
 */

public File makeSharedFile(String url, String filename) {

    File file = null;

    try {

        File cached = getCachedFile(url);

        if (cached != null) {

            File temp = AQUtility.getTempDir();

            if (temp != null) {

                file = new File(temp, filename);
                file.createNewFile();

                FileInputStream fis = new FileInputStream(cached);
                FileOutputStream fos = new FileOutputStream(file);

                FileChannel ic = fis.getChannel();
                FileChannel oc = fos.getChannel();

                try {
                    ic.transferTo(0, ic.size(), oc);
                } finally {
                    AQUtility.close(fis);
                    AQUtility.close(fos);
                    AQUtility.close(ic);
                    AQUtility.close(oc);
                }

            }
        }

    } catch (Exception e) {
        AQUtility.debug(e);
    }

    return file;
}

From source file:edu.harvard.iq.dvn.core.web.servlet.FileDownloadServlet.java

public void streamData(FileChannel in, WritableByteChannel out, String varHeader) {

    long position = 0;
    long howMany = 32 * 1024;

    try {/*w  ww.j a va 2 s.com*/
        // If we are streaming a TAB-delimited file, we will need to add the
        // variable header line:

        if (varHeader != null) {
            ByteBuffer varHeaderByteBuffer = ByteBuffer.wrap(varHeader.getBytes());
            out.write(varHeaderByteBuffer);
        }

        while (position < in.size()) {
            in.transferTo(position, howMany, out);
            position += howMany;
        }

        in.close();
        out.close();
    } catch (IOException ex) {
        // whatever. we don't care at this point.
    }

}

From source file:com.MainFiles.Functions.java

public int createStan() {
    int x = 0;/*from ww w  . j  a  v a 2s .c o  m*/

    String filename = COUNT_FILE;
    File inwrite = new File(filename);

    // Get a file channel for the file
    try {
        FileChannel channel = new RandomAccessFile(inwrite, "rw").getChannel();
        // Use the file channel to create a lock on the file.
        // This method blocks until it can retrieve the lock.
        FileLock lock = channel.lock();
        //  if(!inwrite.exists()) {
        String s = "";
        try {
            int fileSize = (int) channel.size();
            //    System.out.println("int is" + fileSize);
            ByteBuffer bafa = ByteBuffer.allocate(fileSize);
            int numRead = 0;
            while (numRead >= 0) {
                numRead = channel.read(bafa);
                bafa.rewind();
                for (int i = 0; i < numRead; i++) {
                    int b = (int) bafa.get();
                    char c = (char) b;
                    s = s + c;
                }
            }

            x = Integer.parseInt(s);
            if (x > 999999) {
                x = 100000;
            } else if (x < 100000) {
                x = 100000;
            }
            x = ++x;
            String xx = String.valueOf(x);
            byte[] yy = xx.getBytes();
            channel.truncate(0);
            channel.write(ByteBuffer.wrap(yy));
            // channel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        lock.release();
        // Close the file
        channel.close();
    } catch (FileNotFoundException e) {
        String message = "The file " + inwrite.getName() + " does not exist. So no input can be written on it";
        System.out.println(message);
        e.printStackTrace();
        //log to error file
    } catch (IOException e) {
        System.out.println("Problem writing to the logfile " + inwrite.getName());

    }

    filename = "";
    return x;
}

From source file:org.alfresco.repo.search.impl.lucene.index.IndexInfo.java

private boolean checkVersion(FileChannel channel) throws IOException {
    if (channel.size() > 0) {
        channel.position(0);/*from  ww w. j a v a  2 s  . c o m*/
        ByteBuffer buffer;

        if (useNIOMemoryMapping) {
            MappedByteBuffer mbb = channel.map(MapMode.READ_ONLY, 0, 8);
            mbb.load();
            buffer = mbb;
        } else {
            buffer = ByteBuffer.wrap(new byte[8]);
            channel.read(buffer);
            buffer.position(0);
        }

        buffer.position(0);
        long onDiskVersion = buffer.getLong();
        return (version == onDiskVersion);
    }
    return (version == 0);
}

From source file:org.alfresco.repo.search.impl.lucene.index.IndexInfo.java

private void setStatusFromFile(FileChannel channel) throws IOException {
    if (channel.size() > 0) {
        channel.position(0);/*from   w  w  w . j av  a  2 s . com*/
        ByteBuffer buffer;

        if (useNIOMemoryMapping) {
            MappedByteBuffer mbb = channel.map(MapMode.READ_ONLY, 0, channel.size());
            mbb.load();
            buffer = mbb;
        } else {
            buffer = ByteBuffer.wrap(new byte[(int) channel.size()]);
            channel.read(buffer);
            buffer.position(0);
        }

        buffer.position(0);
        long onDiskVersion = buffer.getLong();
        if (version != onDiskVersion) {
            CRC32 crc32 = new CRC32();
            crc32.update((int) (onDiskVersion >>> 32) & 0xFFFFFFFF);
            crc32.update((int) (onDiskVersion >>> 0) & 0xFFFFFFFF);
            int size = buffer.getInt();
            crc32.update(size);
            LinkedHashMap<String, IndexEntry> newIndexEntries = new LinkedHashMap<String, IndexEntry>();
            // Not all state is saved some is specific to this index so we
            // need to add the transient stuff.
            // Until things are committed they are not shared unless it is
            // prepared
            for (int i = 0; i < size; i++) {
                String indexTypeString = readString(buffer, crc32);
                IndexType indexType;
                try {
                    indexType = IndexType.valueOf(indexTypeString);
                } catch (IllegalArgumentException e) {
                    throw new IOException("Invalid type " + indexTypeString);
                }

                String name = readString(buffer, crc32);

                String parentName = readString(buffer, crc32);

                String txStatus = readString(buffer, crc32);
                TransactionStatus status;
                try {
                    status = TransactionStatus.valueOf(txStatus);
                } catch (IllegalArgumentException e) {
                    throw new IOException("Invalid status " + txStatus);
                }

                String mergeId = readString(buffer, crc32);

                long documentCount = buffer.getLong();
                crc32.update((int) (documentCount >>> 32) & 0xFFFFFFFF);
                crc32.update((int) (documentCount >>> 0) & 0xFFFFFFFF);

                long deletions = buffer.getLong();
                crc32.update((int) (deletions >>> 32) & 0xFFFFFFFF);
                crc32.update((int) (deletions >>> 0) & 0xFFFFFFFF);

                byte deleteOnlyNodesFlag = buffer.get();
                crc32.update(deleteOnlyNodesFlag);
                boolean isDeletOnlyNodes = deleteOnlyNodesFlag == 1;

                if (!status.isTransient()) {
                    newIndexEntries.put(name, new IndexEntry(indexType, name, parentName, status, mergeId,
                            documentCount, deletions, isDeletOnlyNodes));
                }
            }
            long onDiskCRC32 = buffer.getLong();
            if (crc32.getValue() == onDiskCRC32) {
                for (IndexEntry entry : indexEntries.values()) {
                    if (entry.getStatus().isTransient()) {
                        newIndexEntries.put(entry.getName(), entry);
                    }
                }
                version = onDiskVersion;
                indexEntries = newIndexEntries;
            } else {
                throw new IOException("Invalid file check sum");
            }
        }
    }

}