Example usage for java.nio ByteBuffer allocate

List of usage examples for java.nio ByteBuffer allocate

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Introduction

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

Prototype

public static ByteBuffer allocate(int capacity)

Source Link

Document

Creates a byte buffer based on a newly allocated byte array.

Usage

From source file:Main.java

public final static ByteBuffer borrowByteBufferNormal() {
    if (byteBuffersPoolNormal.isEmpty()) {
        return ByteBuffer.allocate(MAX_LINE_BYTES_NORMAL);
    } else {/*w  w w  . jav a 2 s  .c  o  m*/
        return byteBuffersPoolNormal.remove(0);
    }
}

From source file:com.icloud.framework.core.nio.ByteBufferUtil.java

public static ByteBuffer clone(ByteBuffer o) {
    assert o != null;

    if (o.remaining() == 0)
        return ByteBuffer.wrap(ArrayUtils.EMPTY_BYTE_ARRAY);

    ByteBuffer clone = ByteBuffer.allocate(o.remaining());

    if (o.isDirect()) {
        for (int i = o.position(); i < o.limit(); i++) {
            clone.put(o.get(i));/*from w ww.j a  v  a2 s.c o  m*/
        }
        clone.flip();
    } else {
        System.arraycopy(o.array(), o.arrayOffset() + o.position(), clone.array(), 0, o.remaining());
    }

    return clone;
}

From source file:ConversionUtil.java

public static byte[] convertToByteArray(short value) {

    byte[] bytes = new byte[2];
    ByteBuffer buffer = ByteBuffer.allocate(bytes.length);
    buffer.putShort(value);/*from www  . j a  v  a 2 s  .  c  om*/
    return buffer.array();
    // buffer.get(bytes);
    /*
    for (int i =0;i<bytes.length; ++i) {
    int offset = (bytes.length -i-1) *8;
    bytes[i] = (byte)((value & (0xff << offset)) >>> offset);
    }
     */
    // return bytes;

}

From source file:com.alvermont.terraj.fracplanet.util.ByteBufferUtils.java

/**
 * The sizes of Java types are fixed and defined by the language spec so
 * this shouldn't be necessary but I'm going to do it anyway - so
 * there!//  ww  w  .j a  v a 2s .  c o  m
 *
 * @return The number of bytes occupied by an int value
 */
public static int sizeofInt() {
    final ByteBuffer buffer = ByteBuffer.allocate(10);

    buffer.putInt(0);

    return buffer.position();
}

From source file:edu.uci.ics.hyracks.dataflow.std.sort.util.DeletableFrameTupleAppenderTest.java

ByteBuffer makeAFrame(int capacity, int count, int deletedBytes) throws HyracksDataException {
    ByteBuffer buffer = ByteBuffer.allocate(capacity);
    int metaOffset = capacity - 4;
    buffer.putInt(metaOffset, deletedBytes);
    metaOffset -= 4;//from  w  w w  . j  a  v a 2 s.com
    buffer.putInt(metaOffset, count);
    metaOffset -= 4;
    for (int i = 0; i < count; i++, metaOffset -= 4) {
        makeARecord(builder, i);
        for (int x = 0; x < builder.getFieldEndOffsets().length; x++) {
            buffer.putInt(builder.getFieldEndOffsets()[x]);
        }
        buffer.put(builder.getByteArray(), 0, builder.getSize());
        assert (metaOffset > buffer.position());
        buffer.putInt(metaOffset, buffer.position());

    }
    return buffer;
}

From source file:com.arpnetworking.tsdcore.sinks.KairosDbSink.java

/**
 * {@inheritDoc}//from www.jav  a 2 s . c  om
 */
@Override
protected Collection<byte[]> serialize(final PeriodicData periodicData) {
    // Initialize serialization structures
    final List<byte[]> completeChunks = Lists.newArrayList();
    final ByteBuffer currentChunk = ByteBuffer.allocate(_maxRequestSize);
    final ByteArrayOutputStream chunkStream = new ByteArrayOutputStream();

    // Extract and transform shared data
    final long timestamp = periodicData.getStart().plus(periodicData.getPeriod()).getMillis();
    final String serializedPeriod = periodicData.getPeriod().toString(ISOPeriodFormat.standard());
    final ImmutableMap<String, String> dimensions = periodicData.getDimensions();
    final Serializer serializer = new Serializer(timestamp, serializedPeriod, dimensions);

    // Initialize the chunk buffer
    currentChunk.put(HEADER);

    // Add aggregated data
    for (final AggregatedData datum : periodicData.getData()) {
        if (!datum.isSpecified()) {
            LOGGER.trace().setMessage("Skipping unspecified datum").addData("datum", datum).log();
            continue;
        }

        serializer.serializeDatum(completeChunks, currentChunk, chunkStream, datum);
    }

    // Add conditions
    for (final Condition condition : periodicData.getConditions()) {
        serializer.serializeCondition(completeChunks, currentChunk, chunkStream, condition);
    }

    // Add the current chunk (if any) to the completed chunks
    if (currentChunk.position() > HEADER_BYTE_LENGTH) {
        currentChunk.put(currentChunk.position() - 1, FOOTER);
        completeChunks.add(Arrays.copyOf(currentChunk.array(), currentChunk.position()));
    }

    return completeChunks;
}

From source file:com.rom.jmultipatcher.Utils.java

public static byte[] byteArrayfromInt(final int dataSize) {

    ByteBuffer intBB = ByteBuffer.allocate(4);
    return intBB.putInt(dataSize).array();
}

From source file:com.bah.culvert.util.Bytes.java

/**
 * Convert the integer to a byte []//from  ww  w.  j a  va  2 s . co m
 * @param i
 * @return
 */
public static byte[] toBytes(int i) {
    int bytes = Integer.SIZE / 8;

    return ByteBuffer.allocate(bytes).putInt(i).array();
}

From source file:Main.java

private static ByteBuffer allocateMore(ByteBuffer output) {
    if (output.capacity() == 0) {
        return ByteBuffer.allocate(1);
    }/* ww  w  .j a v  a2 s  .c  o m*/
    ByteBuffer result = ByteBuffer.allocate(output.capacity() * 2);
    output.flip();
    result.put(output);
    return result;
}

From source file:eu.stratosphere.arraymodel.io.StringInputFormat.java

@Override
public void configure(Configuration parameters) {
    super.configure(parameters);

    // get the charset for the decoding
    String charsetName = parameters.getString(CHARSET_NAME, DEFAULT_CHARSET_NAME);
    if (charsetName == null || !Charset.isSupported(charsetName)) {
        throw new RuntimeException("Unsupported charset: " + charsetName);
    }/*from  ww  w. java2 s  . c o  m*/

    if (charsetName.equals("ISO-8859-1") || charsetName.equalsIgnoreCase("ASCII")) {
        this.ascii = true;
    } else {
        this.decoder = Charset.forName(charsetName).newDecoder();
        this.byteWrapper = ByteBuffer.allocate(1);
    }
}