Example usage for java.io FileInputStream getChannel

Introduction

In this page you can find the example usage for java.io FileInputStream getChannel.

Prototype

public FileChannel getChannel() 

Source Link

Document

Returns the unique java.nio.channels.FileChannel FileChannel object associated with this file input stream.

Usage

From source file:com.project.utilities.Utilities.java

public static ArrayList<ViolationDataModel> readViolationJSONFileToArray() {
    ArrayList<ViolationDataModel> violation = new ArrayList<ViolationDataModel>();
    Gson gson = new Gson();
    String jsonStr = "";
    try {/*ww w .jav  a2 s  .  c o  m*/
        File jsonFile = new File(Constants.EXTERNAL_DIRECTORY + "/" + Constants.FILENAME_VIOLATION_JSON);

        if (!jsonFile.exists()) {
            Log.e("VIOLATION_JSON_LIST", "Error reading file");
        } else {
            Log.e("readJsonFile", "File Found");
        }

        FileInputStream stream = new FileInputStream(jsonFile);
        try {
            FileChannel fc = stream.getChannel();
            MappedByteBuffer byteBuffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
            jsonStr = Charset.defaultCharset().decode(byteBuffer).toString();
        } finally {
            stream.close();
        }
    } catch (Exception e) {
        Log.e("readJsonFile", e.getMessage());
    }

    try {
        JSONObject jsonContent = new JSONObject(jsonStr);
        violation = gson.fromJson(jsonContent.getString("data"),
                new TypeToken<ArrayList<ViolationDataModel>>() {
                }.getType());
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        Log.e("Error GSON", e.getMessage().toString());
    }
    return violation;
}

---

From source file:FileHelper.java

private static void copyFile(File srcFile, File destFile, long chunkSize) throws IOException {
    FileInputStream is = null;
    FileOutputStream os = null;//  w w  w.  ja  va2 s  .co m
    try {
        is = new FileInputStream(srcFile);
        FileChannel iChannel = is.getChannel();
        os = new FileOutputStream(destFile, false);
        FileChannel oChannel = os.getChannel();
        long doneBytes = 0L;
        long todoBytes = srcFile.length();
        while (todoBytes != 0L) {
            long iterationBytes = Math.min(todoBytes, chunkSize);
            long transferredLength = oChannel.transferFrom(iChannel, doneBytes, iterationBytes);
            if (iterationBytes != transferredLength) {
                throw new IOException("Error during file transfer: expected " + iterationBytes + " bytes, only "
                        + transferredLength + " bytes copied.");
            }
            doneBytes += transferredLength;
            todoBytes -= transferredLength;
        }
    } finally {
        if (is != null) {
            is.close();
        }
        if (os != null) {
            os.close();
        }
    }
    boolean successTimestampOp = destFile.setLastModified(srcFile.lastModified());
    if (!successTimestampOp) {
        System.out.println("Could not change timestamp for {}. Index synchronization may be slow. " + destFile);
    }
}

---

From source file:Main.java

public static File copyFile(File destinationFile, File sourceFile) throws IOException {
    FileInputStream inputStream = null;
    FileChannel inputChannel = null;
    FileOutputStream outputStream = null;
    FileChannel outputChannel = null;
    try {/*from  w ww.  j  a  v a 2  s .  c  o  m*/
        inputStream = new FileInputStream(sourceFile);
        inputChannel = inputStream.getChannel();
        outputStream = new FileOutputStream(destinationFile);
        outputChannel = outputStream.getChannel();
        inputChannel.transferTo(0, inputChannel.size(), outputChannel);
        return destinationFile;
    } catch (IOException exception) {
        throw exception;
    } finally {
        if (inputChannel != null) {
            inputChannel.close();
        }
        if (inputStream != null) {
            inputStream.close();
        }
        if (outputChannel != null) {
            outputChannel.close();
        }
        if (outputStream != null) {
            outputStream.close();
        }
    }
}

---

From source file:org.sleuthkit.autopsy.recentactivity.Util.java

public static String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {/*  ww w  .  j  a  va  2  s .co m*/
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        /*
         * Instead of using default, pass in a decoder.
         */
        return Charset.defaultCharset().decode(bb).toString();
    } finally {
        stream.close();
    }
}

---

From source file:org.geomajas.plugin.deskmanager.utility.FileUtils.java

/**
 * Zip all files in a directory, only relative filenames are used, does not recurse.
 * /*from   www . j av a2s  .c  o m*/
 * @param sourceFolder
 * @param targetFileName
 * @return
 * @throws IOException
 */
public static File zipDirectory(File sourceFolder, String targetFileName) throws IOException {
    File target = new File(sourceFolder, targetFileName + (targetFileName.endsWith(".zip") ? "" : ".zip"));
    if (target.isFile()) {
        throw new IOException("Bestand bestaat reeds! " + target.getAbsolutePath());
    }
    File[] files = sourceFolder.listFiles();

    ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(target));
    WritableByteChannel out = Channels.newChannel(zos);
    FileInputStream is = null;
    try {
        for (File file : files) {
            zos.putNextEntry(new ZipEntry(file.getName()));

            is = new FileInputStream(file);
            FileChannel in = is.getChannel();
            in.transferTo(0, in.size(), out);

            is.close();
        }
    } catch (IOException e) {
        throw e;
    } finally {
        if (is != null) {
            is.close();
        }
        if (zos != null) {
            zos.close();
        }
    }

    return target;
}

---

From source file:com.alibaba.otter.shared.common.utils.NioUtilsPerformance.java

public static void sendFileTest(File source, File target) throws Exception {
    FileInputStream fis = null;
    FileOutputStream fos = null;//from w  ww. j a  v  a2 s. co m
    try {
        fis = new FileInputStream(source);
        fos = new FileOutputStream(target);
        FileChannel sChannel = fis.getChannel();
        FileChannel tChannel = fos.getChannel();
        target.createNewFile();
        sChannel.transferTo(0, source.length(), tChannel);
        tChannel.close();
        sChannel.close();
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(fos);
    }
}

---

From source file:com.bazaarvoice.seo.sdk.util.BVUtility.java

public static String readFile(String path) throws IOException {
    FileInputStream stream = new FileInputStream(new File(path));
    try {//from  w w  w  .ja v a2  s .  c om
        FileChannel fc = stream.getChannel();
        MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
        return Charset.forName("UTF-8").decode(bb).toString();
    } finally {
        stream.close();
    }
}

---

From source file:com.alibaba.otter.shared.common.utils.NioUtilsPerformance.java

public static void channelTest(File source, File target) throws Exception {
    FileInputStream fis = null;
    FileOutputStream fos = null;// ww  w  .  jav a  2  s.c om
    try {
        fis = new FileInputStream(source);
        fos = new FileOutputStream(target);
        FileChannel sChannel = fis.getChannel();
        FileChannel tChannel = fos.getChannel();

        target.createNewFile();

        ByteBuffer buffer = ByteBuffer.allocate(16 * 1024);
        while (sChannel.read(buffer) > 0) {
            buffer.flip();
            tChannel.write(buffer);
            buffer.clear();
        }

        tChannel.close();
        sChannel.close();
    } finally {
        IOUtils.closeQuietly(fis);
        IOUtils.closeQuietly(fos);
    }
}

---

From source file:VASSAL.tools.io.IOUtils.java

/**
 * Copies bytes from a large (over 2GB) <code>FileInputStream</code> to a
 * <code>FileOutputStream</code>.
 *
 * This method uses channels. The input file should not be written
 * to during the copy.//from w  w  w . ja v  a  2s.  c  o  m
 *
 * @param in the source
 * @param out the destination
 * @throws IOException if one occurs while reading or writing
 */
public static long copyLarge(FileInputStream in, FileOutputStream out) throws IOException {
    final FileChannel inc = in.getChannel();
    return inc.transferTo(0L, inc.size(), out.getChannel());
}

---

From source file:yui.classes.utils.IOUtils.java

public static void fastCopy(File source, File dest) throws IOException {
    FileInputStream fi = new FileInputStream(source);
    FileChannel fic = fi.getChannel();
    MappedByteBuffer mbuf = fic.map(FileChannel.MapMode.READ_ONLY, 0, source.length());
    fic.close();// w  w w.  ja v a 2  s  .c  om
    fi.close();

    FileOutputStream fo = new FileOutputStream(dest);
    FileChannel foc = fo.getChannel();
    foc.write(mbuf);
    foc.close();
    fo.close();

}

---

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