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:org.apache.spark.network.util.JavaUtils.java

/**
 * Returns a byte array with the buffer's contents, trying to avoid copying the data if
 * possible.//from  w  w  w.  j  a  v  a 2 s  .  c om
 */
public static byte[] bufferToArray(ByteBuffer buffer) {
    if (buffer.hasArray() && buffer.arrayOffset() == 0 && buffer.array().length == buffer.remaining()) {
        return buffer.array();
    } else {
        byte[] bytes = new byte[buffer.remaining()];
        buffer.get(bytes);
        return bytes;
    }
}

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From source file:org.apache.tajo.storage.orc.OrcScanner.java

private static OrcProto.PostScript extractPostScript(ByteBuffer bb, Path path, int psLen, int psAbsOffset)
        throws IOException {
    // TODO: when PB is upgraded to 2.6, newInstance(ByteBuffer) method should be used here.
    assert bb.hasArray();
    CodedInputStream in = CodedInputStream.newInstance(bb.array(), bb.arrayOffset() + psAbsOffset, psLen);
    OrcProto.PostScript ps = OrcProto.PostScript.parseFrom(in);
    checkOrcVersion(LOG, path, ps.getVersionList());

    // Check compression codec.
    switch (ps.getCompression()) {
    case NONE://from   w  w w .j  ava2s . co  m
        break;
    case ZLIB:
        break;
    case SNAPPY:
        break;
    case LZO:
        break;
    default:
        throw new IllegalArgumentException("Unknown compression");
    }
    return ps;
}

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From source file:org.kaaproject.kaa.server.common.utils.Utils.java

public static String encodeHexString(ByteBuffer buf) {
    return buf != null && buf.hasArray() ? Hex.encodeHexString(buf.array()) : "";
}

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From source file:org.ms123.common.git.FileHolder.java

public static byte[] encode(final String str) {
    final ByteBuffer bb = Constants.CHARSET.encode(str);
    final int len = bb.limit();
    if (bb.hasArray() && bb.arrayOffset() == 0) {
        final byte[] arr = bb.array();
        if (arr.length == len)
            return arr;
    }/*ww  w.  j  a v  a 2s .c om*/
    final byte[] arr = new byte[len];
    bb.get(arr);
    return arr;
}

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From source file:org.panbox.desktop.common.vfs.backend.generic.GenericVirtualFileImpl.java

@Override
public int write(long seekpos, ByteBuffer b) throws IOException, PanboxEncryptionException {
    try {/*ww  w  .  j  a  v a2s.co m*/
        aesRandomAccessFile.seek(seekpos);
        byte[] buf;
        if (b.hasArray()) {
            buf = b.array();
            this.write(buf, 0, buf.length);
        } else {
            buf = new byte[b.remaining()];
            b.get(buf);
            this.write(buf, 0, buf.length);
        }
        return buf.length;
    } catch (FileEncryptionException e) {
        throw new PanboxEncryptionException(e.getMessage(), e);
    }
}

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From source file:org.wso2.andes.mqtt.MQTTChannel.java

/**
 * Will add the message content which will be recived
 *
 * @param message            the content of the message which was published
 * @param topic              the name of the topic which the message was published
 * @param qosLevel           the level of the qos the message was published
 * @param mqttLocalMessageID the channel id the subscriber is bound to
 * @param retain             whether the message requires to be persisted
 * @param publisherID        the id which will uniquely identify the publisher
 * @throws MQTTException occurs if there was an errro while adding the message content
 *///w w w .  j a  v  a2s.c o m
public void addMessage(ByteBuffer message, String topic, int qosLevel, int mqttLocalMessageID, boolean retain,
        UUID publisherID) throws MQTTException {
    if (message.hasArray()) {
        //Will get the bytes of the message
        byte[] messageData = message.array();
        long messageID = 0; // unique message Id will be generated By Andes.
        //Will start converting the message body
        AndesMessagePart messagePart = MQTTUtils.convertToAndesMessage(messageData, messageID);
        //Will Create the Andes Header
        AndesMessageMetadata messageHeader = MQTTUtils.convertToAndesHeader(messageID, topic, qosLevel,
                messageData.length, retain, publisherID);

        AndesMessage andesMessage = new AndesMessage(messageHeader);
        andesMessage.addMessagePart(messagePart);
        Andes.getInstance().messageReceived(andesMessage);
        if (log.isDebugEnabled()) {
            log.debug(" Message added with message id " + mqttLocalMessageID);
        }

    } else {
        throw new MQTTException("Message content is not backed by an array, or the array is read-only .");
    }
}

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From source file:org.xenei.bloomgraph.bloom.sql.DBIO.java

/**
 * Convert the byte buffer to a input stream.
 * /*from w ww . ja  v a  2 s .  co  m*/
 * @param buffer
 *            the buffer to conver
 * @return the input stream.
 */
public static InputStream asInputStream(final ByteBuffer buffer) {
    final ByteBuffer buff = buffer.slice().order(ByteOrder.LITTLE_ENDIAN);
    if (buff.hasArray()) {
        // use heap buffer; no array is created; only the reference is used
        return new ByteArrayInputStream(buff.array());
    }
    return new ByteBufferInputStream(buff);
}

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From source file:org.zuinnote.hadoop.bitcoin.format.BitcoinRawBlockRecordReader.java

/**
*
* Read a next block. /*from w w  w  . jav a  2 s. c  om*/
*
* @param key is a 64 byte array (hashMerkleRoot and prevHashBlock)
* @param value is a deserialized Java object of class BitcoinBlock
*
* @return true if next block is available, false if not
*/
public boolean next(BytesWritable key, BytesWritable value) throws IOException {
    // read all the blocks, if necessary a block overlapping a split
    while (getFilePosition() <= getEnd()) { // did we already went beyond the split (remote) or do we have no further data left?
        ByteBuffer dataBlock = null;
        try {
            dataBlock = getBbr().readRawBlock();
        } catch (BitcoinBlockReadException e) {
            // log
            LOG.error(e);
        }
        if (dataBlock == null)
            return false;
        byte newKey[] = getBbr().getKeyFromRawBlock(dataBlock);
        key.set(newKey, 0, newKey.length);
        byte[] dataBlockArray = null;
        if (dataBlock.hasArray() == true) {
            dataBlockArray = dataBlock.array();
        } else {
            dataBlockArray = new byte[dataBlock.capacity()];
            dataBlock.get(dataBlockArray);
        }
        value.set(dataBlockArray, 0, dataBlockArray.length);
        return true;
    }
    return false;
}

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From source file:tachyon.io.Utils.java

/**
 * Converts a byte buffer to a base64-encoded String. Avoids copying the array if possible.
 *///from   ww  w. ja  va2  s .c  om
public static String byteBufferToBase64(ByteBuffer buf) {
    if (buf == null) {
        return null;
    }

    if (buf.hasArray() && buf.position() == 0 && buf.limit() == buf.capacity()) {
        return Base64.encodeBase64String(buf.array());
    } else {
        byte[] b = new byte[buf.remaining()];
        buf.get(b);
        return Base64.encodeBase64String(b);
    }
}

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From source file:wicket.protocol.http.FilePageStore.java

/**
 * @see wicket.protocol.http.SecondLevelCacheSessionStore.IPageStore#getPage(java.lang.String,
 *      int, int)/*from  w  w w . j a va  2  s. c om*/
 */
public Page getPage(String sessionId, int id, int versionNumber) {
    File sessionDir = new File(workDir, sessionId);
    if (sessionDir.exists()) {
        File pageFile = getPageFile(id, versionNumber, sessionDir);
        if (pageFile.exists()) {
            FileInputStream fis = null;
            try {
                byte[] pageData = null;
                fis = new FileInputStream(pageFile);
                int length = (int) pageFile.length();
                ByteBuffer bb = ByteBuffer.allocate(length);
                fis.getChannel().read(bb);
                if (bb.hasArray()) {
                    pageData = bb.array();
                } else {
                    pageData = new byte[length];
                    bb.get(pageData);
                }

                Page page = (Page) Objects.byteArrayToObject(pageData);
                return page.getVersion(versionNumber);
            } catch (Exception e) {
                log.debug("Error loading page " + id + " with version " + versionNumber + " for the sessionid "
                        + sessionId + " from disc", e);
            } finally {
                try {
                    if (fis != null) {
                        fis.close();
                    }
                } catch (IOException ex) {
                    // ignore
                }
            }
        }
    }
    return null;
}

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