Example usage for java.nio ByteBuffer flip

Introduction

In this page you can find the example usage for java.nio ByteBuffer flip.

Prototype

public final Buffer flip()

Source Link

Document

Flips this buffer.

Usage

From source file:Main.java

public static void copy(ReadableByteChannel src, WritableByteChannel dest) throws IOException {
    ByteBuffer buffer = ByteBuffer.allocateDirect(CAPACITY);
    while (src.read(buffer) != -1) {
        buffer.flip();
        dest.write(buffer);/*from  w  ww .  jav a 2s . c  o  m*/
        buffer.compact();
    }

    buffer.flip();

    while (buffer.hasRemaining()) {
        dest.write(buffer);
    }
}

From source file:IOUtilities.java

/**
 * Copy ALL available data from one stream into another
 * @param in/*from ww  w  .  ja  v a  2 s .  c  om*/
 * @param out
 * @throws IOException
 */
public static void copy(InputStream in, OutputStream out) throws IOException {
    ReadableByteChannel source = Channels.newChannel(in);
    WritableByteChannel target = Channels.newChannel(out);

    ByteBuffer buffer = ByteBuffer.allocate(16 * 1024);
    while (source.read(buffer) != -1) {
        buffer.flip(); // Prepare the buffer to be drained
        while (buffer.hasRemaining()) {
            target.write(buffer);
        }
        buffer.clear(); // Empty buffer to get ready for filling
    }

    source.close();
    target.close();

}

From source file:Main.java

public static void transfer(ReadableByteChannel in, WritableByteChannel out) throws IOException {
    ByteBuffer buffer = ByteBuffer.allocate(4096);
    while (in.read(buffer) != -1) {
        buffer.flip();
        while (buffer.hasRemaining()) {
            out.write(buffer);//  www  .java  2 s.c  o  m
        }
        buffer.clear();
    }
}

From source file:com.arrow.acn.client.utils.MD5Util.java

public static byte[] calcMD5Checksum(Path path) throws NoSuchAlgorithmException, IOException {
    MessageDigest md = MessageDigest.getInstance("MD5");
    try (SeekableByteChannel sbc = Files.newByteChannel(path)) {
        ByteBuffer buf = ByteBuffer.allocateDirect(BUFFER_SIZE);
        while (sbc.read(buf) > 0) {
            buf.flip();
            md.update(buf);/*from www.  j  ava 2  s.  c  o  m*/
            buf.clear();
        }
    }
    return md.digest();
}

From source file:Main.java

public static ByteBuffer clone(ByteBuffer original) {
    ByteBuffer clone = ByteBuffer.allocate(original.capacity());
    original.rewind();//copy from the beginning
    clone.put(original);//from  w  ww  .  j  a v a 2s. c o m
    original.rewind();
    clone.flip();
    return clone;
}

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

public static int bytes2int(byte[] b) {
    ByteBuffer buf = ByteBuffer.allocate(4);
    buf.put(b);/*from ww w.  jav  a  2 s  .c om*/
    buf.flip();
    return buf.getInt();
}

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

public static long bytes2long(byte[] b) {
    ByteBuffer buf = ByteBuffer.allocate(8);
    buf.put(b);/*from   w  w  w.  j  ava 2  s.  c o m*/
    buf.flip();
    return buf.getLong();
}

From source file:Main.java

public static void fastChannelCopy(final ReadableByteChannel src, final WritableByteChannel dest)
        throws IOException {
    final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
    while (src.read(buffer) != -1) {
        // prepare the buffer to be drained
        buffer.flip();
        // write to the channel, may block
        dest.write(buffer);/*from w  w w.j a  va2  s  .c o m*/
        // If partial transfer, shift remainder down
        // If buffer is empty, same as doing recycle()
        buffer.compact();
    }
    // EOF will leave buffer in fill state
    buffer.flip();
    // make sure the buffer is fully drained.
    while (buffer.hasRemaining()) {
        dest.write(buffer);
    }
}

From source file:com.thinkberg.webdav.Util.java

public static long copyStream(final InputStream is, final OutputStream os) throws IOException {
    ReadableByteChannel rbc = Channels.newChannel(is);
    WritableByteChannel wbc = Channels.newChannel(os);

    int bytesWritten = 0;
    final ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
    while (rbc.read(buffer) != -1) {
        buffer.flip();
        bytesWritten += wbc.write(buffer);
        buffer.compact();/*from w w w  .ja va2s . c  om*/
    }
    buffer.flip();
    while (buffer.hasRemaining()) {
        bytesWritten += wbc.write(buffer);
    }

    rbc.close();
    wbc.close();

    return bytesWritten;
}

From source file:Main.java

/**
 * @param columnarKeyBlockData//from   w ww .  j a  va2s  . co m
 * @param columnarKeyStoreMetadata
 * @return
 * @author s71955 The high cardinality dimensions rows will be send in byte
 * array with its data length appended in the
 * ColumnarKeyStoreDataHolder byte array since high cardinality dim
 * data will not be part of MDKey/Surrogate keys. In this method the
 * byte array will be scanned and the length which is stored in
 * short will be removed.
 */
public static List<byte[]> readColumnarKeyBlockDataForNoDictionaryCols(byte[] columnarKeyBlockData) {
    List<byte[]> columnarKeyBlockDataList = new ArrayList<byte[]>(50);
    ByteBuffer noDictionaryValKeyStoreDataHolder = ByteBuffer.allocate(columnarKeyBlockData.length);
    noDictionaryValKeyStoreDataHolder.put(columnarKeyBlockData);
    noDictionaryValKeyStoreDataHolder.flip();
    while (noDictionaryValKeyStoreDataHolder.hasRemaining()) {
        short dataLength = noDictionaryValKeyStoreDataHolder.getShort();
        byte[] noDictionaryValKeyData = new byte[dataLength];
        noDictionaryValKeyStoreDataHolder.get(noDictionaryValKeyData);
        columnarKeyBlockDataList.add(noDictionaryValKeyData);
    }
    return columnarKeyBlockDataList;

}