Example usage for java.nio ByteBuffer slice

Introduction

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

Prototype

public abstract ByteBuffer slice();

Source Link

Document

Returns a sliced buffer that shares its content with this buffer.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    ByteBuffer bbuf = ByteBuffer.allocate(10);
    int capacity = bbuf.capacity(); // 10
    System.out.println(capacity);
    bbuf.putShort(2, (short) 123);

    ByteBuffer bb = bbuf.slice();

    System.out.println(Arrays.toString(bb.array()));
}

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From source file:org.commoncrawl.service.queryserver.master.S3Helper.java

public static void main(String[] args) {
    File arcFile = new File(args[0]);
    long offset = Long.parseLong(args[1]);
    long contentSize = Long.parseLong(args[2]);

    try {/*  w w w.  j  a  v a 2 s  .com*/
        RandomAccessFile fileHandle = new RandomAccessFile(arcFile, "r");

        fileHandle.seek(Math.max(offset - 10, 0));

        byte data[] = new byte[(int) contentSize + 10];
        fileHandle.readFully(data);

        ByteBuffer buffer = ByteBuffer.wrap(data);
        buffer.position(0);

        int position = scanForGZIPHeader(buffer.slice());

        buffer.position(position);

        StreamingArcFileReader reader = new StreamingArcFileReader(false);
        reader.available(buffer);
        ArcFileItem nextItem = reader.getNextItem();
        System.out.println(nextItem.getUri());

    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

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From source file:Main.java

/**
 * <p>/*from   www  .  jav  a 2  s.  c o  m*/
 * Creates a new byte buffer whose content is a shared subsequence of this
 * buffer's content.
 * </p>
 * <p>
 * The content of the new buffer will start at this buffer's current position.
 * Changes to this buffer's content will be visible in the new buffer, and
 * vice versa; the two buffers' position, limit, and mark values will be
 * independent. The utility method also preserves the byte order of the source
 * buffer into the new buffer.
 * </p>
 * <p>
 * The new buffer's position will be zero, its capacity and its limit will be
 * the number of bytes remaining in this buffer, and its mark will be
 * undefined. The new buffer will be direct if, and only if, this buffer is
 * direct, and it will be read-only if, and only if, this buffer is read-only.
 * </p>
 * 
 * @param buffer
 *          source buffer
 * @return new buffer
 */
public static ByteBuffer slice(ByteBuffer buffer) {

    final ByteOrder o = buffer.order();
    final ByteBuffer r = buffer.slice();
    r.order(o);

    return r;
}

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From source file:Main.java

/**
 * Finds next Nth MPEG bitstream marker 0x000001xx and returns the data that
 * preceeds it as a ByteBuffer slice//from w  w  w  . j  av  a 2 s.  c  o m
 * 
 * Segment byte order is always little endian
 * 
 * @param buf
 * @return
 */
public static final ByteBuffer gotoMarker(ByteBuffer buf, int n, int mmin, int mmax) {
    if (!buf.hasRemaining())
        return null;

    int from = buf.position();
    ByteBuffer result = buf.slice();
    result.order(ByteOrder.BIG_ENDIAN);

    int val = 0xffffffff;
    while (buf.hasRemaining()) {
        val = (val << 8) | (buf.get() & 0xff);
        if (val >= mmin && val <= mmax) {
            if (n == 0) {
                buf.position(buf.position() - 4);
                result.limit(buf.position() - from);
                break;
            }
            --n;
        }
    }
    return result;
}

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From source file:com.liveramp.commons.util.BytesUtils.java

public static ByteBuffer byteBufferDeepCopy(ByteBuffer src) {
    ByteBuffer copy = ByteBuffer.allocate(src.remaining()).put(src.slice());
    copy.flip();/*w w  w .  j  av a  2 s  .c o  m*/
    return copy;
}

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From source file:com.palantir.atlasdb.keyvalue.cassandra.CassandraKeyValueServices.java

static Pair<byte[], Long> decompose(ByteBuffer composite) {
    composite = composite.slice().order(ByteOrder.BIG_ENDIAN);

    short len = composite.getShort();
    byte[] colName = new byte[len];
    composite.get(colName);//w  w  w.  jav  a  2  s  . c  o  m

    short shouldBeZero = composite.getShort();
    Validate.isTrue(shouldBeZero == 0);

    byte shouldBe8 = composite.get();
    Validate.isTrue(shouldBe8 == 8);
    long ts = composite.getLong();

    return Pair.create(colName, (~ts));
}

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From source file:Main.java

public static ByteBuffer copyBinary(final ByteBuffer orig) {
    if (orig == null) {
        return null;
    }//w  ww  .j  a  v a  2 s .  com
    ByteBuffer copy = ByteBuffer.wrap(new byte[orig.remaining()]);
    if (orig.hasArray()) {
        System.arraycopy(orig.array(), orig.arrayOffset() + orig.position(), copy.array(), 0, orig.remaining());
    } else {
        orig.slice().get(copy.array());
    }

    return copy;
}

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From source file:de.javagl.jgltf.model.io.GltfUtils.java

/**
 * Tries to find an <code>ImageReader</code> that is capable of reading
 * the given image data. The returned image reader will be initialized
 * by passing an ImageInputStream that is created from the given data
 * to its <code>setInput</code> method. The caller is responsible for 
 * disposing the returned image reader.//  w w  w . j a  v  a2s.c o  m
 *  
 * @param imageData The image data
 * @return The image reader
 * @throws IOException If no matching image reader can be found
 */
@SuppressWarnings("resource")
private static ImageReader findImageReader(ByteBuffer imageData) throws IOException {
    InputStream inputStream = Buffers.createByteBufferInputStream(imageData.slice());
    ImageInputStream imageInputStream = ImageIO.createImageInputStream(inputStream);
    Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
    if (imageReaders.hasNext()) {
        ImageReader imageReader = imageReaders.next();
        imageReader.setInput(imageInputStream);
        return imageReader;
    }
    throw new IOException("Could not find ImageReader for image data");
}

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From source file:com.liveramp.commons.util.BytesUtils.java

public static ByteBuffer byteBufferDeepCopy(ByteBuffer src, ByteBuffer dst) {
    if (dst == null || dst.capacity() < src.remaining()) {
        dst = byteBufferDeepCopy(src);// w ww. j a v a 2s.  co  m
    } else {
        dst.rewind();
        dst.limit(src.remaining());
        dst.put(src.slice());
        dst.flip();
    }
    return dst;
}

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From source file:org.wso2.andes.amqp.AMQPUtils.java

/**
 * convert Andes metadata to StorableMessageMetaData
 *
 * @param andesMessageMetadata andes metadata
 * @return StorableMessageMetaData//from ww w. j  ava2s  .  c o  m
 */
public static StorableMessageMetaData convertAndesMetadataToAMQMetadata(
        AndesMessageMetadata andesMessageMetadata) {
    byte[] dataAsBytes = andesMessageMetadata.getMetadata();
    ByteBuffer buf = ByteBuffer.wrap(dataAsBytes);
    buf.position(1);
    buf = buf.slice();
    MessageMetaDataType type = MessageMetaDataType.values()[dataAsBytes[0]];
    return type.getFactory().createMetaData(buf);
}

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