Example usage for java.nio ByteBuffer hasArray

List of usage examples for java.nio ByteBuffer hasArray

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Introduction

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

Prototype

public final boolean hasArray()

Source Link

Document

Indicates whether this buffer is based on a byte array and provides read/write access.

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);
    System.out.println(bbuf.hasArray());
}

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);
    System.out.println(Arrays.toString(bbuf.array()));

    System.out.println(bbuf.hasArray());
}

From source file:Main.java

public static boolean wrapsFullArray(ByteBuffer byteBuffer) {
    return byteBuffer.hasArray() && byteBuffer.position() == 0 && byteBuffer.arrayOffset() == 0
            && byteBuffer.remaining() == byteBuffer.capacity();
}

From source file:net.sf.jml.util.DigestUtils.java

private static void update(MessageDigest digest, ByteBuffer buffer) {
    if (buffer.hasArray()) {
        digest.update(buffer.array(), buffer.arrayOffset() + buffer.position(), buffer.remaining());
    } else {/*ww w . j a  v  a  2s.c  o m*/
        byte[] b = new byte[buffer.remaining()];
        buffer.get(b);
        digest.update(b);
    }
}

From source file:Main.java

public static List<ByteBuffer> mergeAdjacentBuffers(List<ByteBuffer> samples) {
    ArrayList<ByteBuffer> nuSamples = new ArrayList<ByteBuffer>(samples.size());
    for (ByteBuffer buffer : samples) {
        int lastIndex = nuSamples.size() - 1;
        if (lastIndex >= 0 && buffer.hasArray() && nuSamples.get(lastIndex).hasArray()
                && buffer.array() == nuSamples.get(lastIndex).array() && nuSamples.get(lastIndex).arrayOffset()
                        + nuSamples.get(lastIndex).limit() == buffer.arrayOffset()) {
            ByteBuffer oldBuffer = nuSamples.remove(lastIndex);
            ByteBuffer nu = ByteBuffer
                    .wrap(buffer.array(), oldBuffer.arrayOffset(), oldBuffer.limit() + buffer.limit()).slice();
            // We need to slice here since wrap([], offset, length) just sets position and not the arrayOffset.
            nuSamples.add(nu);//from w ww  .j a va2  s . com
        } else if (lastIndex >= 0 && buffer instanceof MappedByteBuffer
                && nuSamples.get(lastIndex) instanceof MappedByteBuffer && nuSamples.get(lastIndex)
                        .limit() == nuSamples.get(lastIndex).capacity() - buffer.capacity()) {
            // This can go wrong - but will it?
            ByteBuffer oldBuffer = nuSamples.get(lastIndex);
            oldBuffer.limit(buffer.limit() + oldBuffer.limit());
        } else {
            buffer.reset();
            nuSamples.add(buffer);
        }
    }
    return nuSamples;
}

From source file:Main.java

public static List<ByteBuffer> mergeAdjacentBuffers(List<ByteBuffer> paramList) {
    ArrayList localArrayList = new ArrayList(paramList.size());
    Iterator localIterator = paramList.iterator();
    while (localIterator.hasNext()) {
        ByteBuffer localByteBuffer1 = (ByteBuffer) localIterator.next();
        int i = -1 + localArrayList.size();
        if ((i >= 0) && (localByteBuffer1.hasArray()) && (((ByteBuffer) localArrayList.get(i)).hasArray())
                && (localByteBuffer1.array() == ((ByteBuffer) localArrayList.get(i)).array())
                && (((ByteBuffer) localArrayList.get(i)).arrayOffset()
                        + ((ByteBuffer) localArrayList.get(i)).limit() == localByteBuffer1.arrayOffset())) {
            ByteBuffer localByteBuffer3 = (ByteBuffer) localArrayList.remove(i);
            localArrayList.add(ByteBuffer.wrap(localByteBuffer1.array(), localByteBuffer3.arrayOffset(),
                    localByteBuffer3.limit() + localByteBuffer1.limit()).slice());
        } else if ((i >= 0) && ((localByteBuffer1 instanceof MappedByteBuffer))
                && ((localArrayList.get(i) instanceof MappedByteBuffer))
                && (((ByteBuffer) localArrayList.get(i))
                        .limit() == ((ByteBuffer) localArrayList.get(i)).capacity()
                                - localByteBuffer1.capacity())) {
            ByteBuffer localByteBuffer2 = (ByteBuffer) localArrayList.get(i);
            localByteBuffer2.limit(localByteBuffer1.limit() + localByteBuffer2.limit());
        } else {/*from   w  w  w . j  a v a 2  s .  c om*/
            localByteBuffer1.reset();
            localArrayList.add(localByteBuffer1);
        }
    }
    return localArrayList;
}

From source file:Main.java

public static ByteBuffer copyBinary(final ByteBuffer orig) {
    if (orig == null) {
        return null;
    }/*from  ww w  .  ja v  a 2  s .c om*/
    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;
}

From source file:cn.ctyun.amazonaws.util.StringUtils.java

/**
 * Base64 encodes the data in the specified byte buffer and returns it as a
 * base64 encoded string./*from  w w  w  .  ja  va  2  s. c o  m*/
 *
 * @param byteBuffer
 *            The data to base64 encode and return as a string.
 *
 * @return The base64 encoded contents of the specified byte buffer.
 */
public static String fromByteBuffer(ByteBuffer byteBuffer) {
    byte[] encodedBytes = null;
    if (byteBuffer.hasArray()) {
        encodedBytes = Base64.encodeBase64(byteBuffer.array());
    } else {
        byte[] binaryData = new byte[byteBuffer.limit()];
        byteBuffer.get(binaryData);
        encodedBytes = Base64.encodeBase64(binaryData);
    }
    return new String(encodedBytes);
}

From source file:com.glaf.core.util.BinaryUtils.java

/**
 * Returns a copy of the bytes from the given <code>ByteBuffer</code>,
 * ranging from the the buffer's current position to the buffer's limit; or
 * null if the input is null.// w  ww.  j av a 2 s . co m
 * <p>
 * The internal states of the given byte buffer will be restored when this
 * method completes execution.
 * <p>
 * When handling <code>ByteBuffer</code> from user's input, it's typical to
 * call the {@link #copyBytesFrom(ByteBuffer)} instead of
 * {@link #copyAllBytesFrom(ByteBuffer)} so as to account for the position
 * of the input <code>ByteBuffer</code>. The opposite is typically true,
 * however, when handling <code>ByteBuffer</code> from withint the
 * unmarshallers of the low-level clients.
 */
public static byte[] copyBytesFrom(ByteBuffer bb) {
    if (bb == null)
        return null;
    if (bb.hasArray())
        return Arrays.copyOfRange(bb.array(), bb.position(), bb.limit());
    bb.mark();
    try {
        byte[] dst = new byte[bb.remaining()];
        bb.get(dst);
        return dst;
    } finally {
        bb.reset();
    }
}

From source file:com.glaf.core.util.BinaryUtils.java

/**
 * Returns a copy of all the bytes from the given <code>ByteBuffer</code>,
 * from the beginning to the buffer's limit; or null if the input is null.
 * <p>//w w  w  . j  a va 2s  .  c  om
 * The internal states of the given byte buffer will be restored when this
 * method completes execution.
 * <p>
 * When handling <code>ByteBuffer</code> from user's input, it's typical to
 * call the {@link #copyBytesFrom(ByteBuffer)} instead of
 * {@link #copyAllBytesFrom(ByteBuffer)} so as to account for the position
 * of the input <code>ByteBuffer</code>. The opposite is typically true,
 * however, when handling <code>ByteBuffer</code> from withint the
 * unmarshallers of the low-level clients.
 */
public static byte[] copyAllBytesFrom(ByteBuffer bb) {
    if (bb == null)
        return null;
    if (bb.hasArray())
        return Arrays.copyOf(bb.array(), bb.limit());
    bb.mark();
    // the default ByteBuffer#mark() and reset() won't work, as the
    // rewind would discard the mark position
    final int marked = bb.position();
    try {
        byte[] dst = new byte[bb.rewind().remaining()];
        bb.get(dst);
        return dst;
    } finally {
        bb.position(marked);
    }
}