Example usage for java.nio ByteBuffer hasArray

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:com.glaf.core.util.ByteBufferUtils.java

/**
 * Transfer bytes from one ByteBuffer to another. This function acts as
 * System.arrayCopy() but for ByteBuffers.
 * // w ww. ja  va2  s .  c om
 * @param src
 *            the source ByteBuffer
 * @param srcPos
 *            starting position in the source ByteBuffer
 * @param dst
 *            the destination ByteBuffer
 * @param dstPos
 *            starting position in the destination ByteBuffer
 * @param length
 *            the number of bytes to copy
 */
public static void arrayCopy(ByteBuffer src, int srcPos, ByteBuffer dst, int dstPos, int length) {
    if (src.hasArray() && dst.hasArray()) {
        System.arraycopy(src.array(), src.arrayOffset() + srcPos, dst.array(), dst.arrayOffset() + dstPos,
                length);
    } else {
        if (src.limit() - srcPos < length || dst.limit() - dstPos < length)
            throw new IndexOutOfBoundsException();

        for (int i = 0; i < length; i++)

            dst.put(dstPos++, src.get(srcPos++));
    }
}

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

/**
 * @return a new copy of the data in @param buffer USUALLY YOU SHOULD USE
 *         ByteBuffer.duplicate() INSTEAD, which creates a new Buffer (so
 *         you can mutate its position without affecting the original)
 *         without copying the underlying array.
 *//*from  w w  w  .j av a 2  s  . com*/
public static ByteBuffer clone(ByteBuffer buffer) {
    assert buffer != null;

    if (buffer.remaining() == 0)
        return EMPTY_BYTE_BUFFER;

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

    if (buffer.hasArray()) {
        System.arraycopy(buffer.array(), buffer.arrayOffset() + buffer.position(), clone.array(), 0,
                buffer.remaining());
    } else {
        clone.put(buffer.duplicate());
        clone.flip();
    }

    return clone;
}

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From source file:net.darkmist.alib.io.BufferUtil.java

public static byte[] asBytes(ByteBuffer buf) {
    buf = buf.duplicate();/*w ww.j av  a  2 s .  co  m*/
    /* To use buf.array() the buffer must:
     *    be writable as the array will be writable
     *    have arrayOffset() == 0 or the array will not start at the right location
     *    the returned array must be the same length as the buffer's limit or it will be the wrong size.
     */
    if (!buf.isReadOnly() && buf.hasArray() && buf.arrayOffset() == 0) {
        logger.debug("!read-only, hasArray && offset is 0");
        byte[] ret = buf.array();

        if (ret.length == buf.limit())
            return ret;
        logger.debug("length of array !=limit, doing copy...");
    }

    byte[] bytes = new byte[buf.limit()];
    buf.get(bytes, 0, buf.limit());
    return bytes;
}

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From source file:com.ah.ui.actions.home.clientManagement.service.CertificateGenSV.java

@SuppressWarnings("resource")
public static byte[] readFromFile(File file) throws IOException {
    FileChannel fileChannel = new FileInputStream(file).getChannel();
    ByteBuffer bb = ByteBuffer.allocate((int) fileChannel.size());
    fileChannel.read(bb);//from  w w w.j av  a2 s. c  om
    fileChannel.close();
    bb.flip();
    byte[] bytes;

    if (bb.hasArray()) {
        bytes = bb.array();
    } else {
        bytes = new byte[bb.limit()];
        bb.get(bytes);
    }

    return bytes;
}

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

/**
 * from to /*from www.  j  av a 2  s .  c  om*/
 * 
 * @param fromBuffer
 *            Buffer ? flush
 * @param toBuffer
 *            Buffer ? fill
 * @return number of bytes moved
 */
public static int put(ByteBuffer fromBuffer, ByteBuffer toBuffer) {
    int put;
    int remaining = fromBuffer.remaining();
    if (remaining > 0) { // 
        if (remaining <= toBuffer.remaining()) {
            toBuffer.put(fromBuffer);
            put = remaining;
            // from 
            fromBuffer.position(fromBuffer.limit());
        }
        // heap buffer
        else if (fromBuffer.hasArray()) {
            put = toBuffer.remaining();
            // ??
            toBuffer.put(fromBuffer.array(), fromBuffer.arrayOffset() + fromBuffer.position(), put);
            fromBuffer.position(fromBuffer.position() + put);
        }
        // direct buffer
        else {
            // ??
            put = toBuffer.remaining();
            ByteBuffer slice = fromBuffer.slice();
            slice.limit(put);
            toBuffer.put(slice);
            fromBuffer.position(fromBuffer.position() + put);
        }
    } else {
        put = 0;
    }
    return put;
}

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From source file:com.homeadvisor.kafdrop.service.MessageInspector.java

private byte[] readBytes(ByteBuffer buffer, int offset, int size) {
    byte[] dest = new byte[size];
    if (buffer.hasArray()) {
        System.arraycopy(buffer.array(), buffer.arrayOffset() + offset, dest, 0, size);
    } else {/*w  ww .  j  a  v a 2  s.  co m*/
        buffer.mark();
        buffer.get(dest);
        buffer.reset();
    }
    return dest;
}

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From source file:com.joyent.manta.http.entity.DigestedEntity.java

@Override
public void writeTo(final OutputStream out) throws IOException {
    digest.reset(); // reset the digest state in case we're in a retry

    // If our wrapped entity is backed by a buffer of some form
    // we can read easily read the whole buffer into our message digest.
    if (wrapped instanceof MemoryBackedEntity) {
        final MemoryBackedEntity entity = (MemoryBackedEntity) wrapped;
        final ByteBuffer backingBuffer = entity.getBackingBuffer();

        if (backingBuffer.hasArray()) {
            final byte[] bytes = backingBuffer.array();
            final int offset = backingBuffer.arrayOffset();
            final int position = backingBuffer.position();
            final int limit = backingBuffer.limit();

            digest.update(bytes, offset + position, limit - position);
            backingBuffer.position(limit);

            wrapped.writeTo(out);//from w ww . j  av a  2 s.  c  o  m
        }
    } else {
        try (DigestOutputStream dout = new DigestOutputStream(digest);
                TeeOutputStream teeOut = new TeeOutputStream(out, dout)) {
            wrapped.writeTo(teeOut);
            teeOut.flush();
        }
    }
}

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From source file:nl.salp.warcraft4j.io.HttpDataReader.java

/**
 * {@inheritDoc}/*from ww w. j  a  va2s  .  com*/
 */
@Override
protected int readData(ByteBuffer buffer) throws DataReadingException {
    try {
        int read = 0;
        byte[] dataArray;
        if (buffer.hasArray()) {
            read = responseStream.read(buffer.array());
        } else {
            byte[] data = new byte[buffer.capacity()];
            read = responseStream.read(data);
            buffer.put(data);
        }
        return read;
    } catch (IOException e) {
        throw new DataReadingException(e);
    }
}

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From source file:com.github.mrstampy.gameboot.otp.websocket.OtpEncryptedWebSocketHandler.java

private byte[] extractArray(WebSocketSession session, BinaryMessage message) throws IOException {
    ByteBuffer buf = message.getPayload();

    if (buf.hasArray())
        return buf.array();

    int size = buf.remaining();

    if (size == 0) {
        log.error("No message, closing session {}", session);
        session.close();//  w w w .ja va2  s.  c om
        return null;
    }

    byte[] b = new byte[size];

    buf.get(b, 0, b.length);

    return b;
}

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From source file:co.cask.cdap.client.rest.RestStreamWriter.java

@Override
public ListenableFuture<Void> write(ByteBuffer buffer, Map<String, String> headers)
        throws IllegalArgumentException {
    Preconditions.checkArgument(buffer != null, "ByteBuffer parameter is null.");
    HttpEntity content;//ww  w  .  j a v  a2 s. co m
    if (buffer.hasArray()) {
        content = new ByteArrayEntity(buffer.array(), buffer.arrayOffset() + buffer.position(),
                buffer.remaining());
    } else {
        byte[] bytes = new byte[buffer.remaining()];
        buffer.get(bytes);
        content = new ByteArrayEntity(bytes);
    }
    return write(content, headers);
}

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