Example usage for java.nio ByteBuffer remaining

List of usage examples for java.nio ByteBuffer remaining

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Introduction

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

Prototype

public final int remaining()

Source Link

Document

Returns the number of remaining elements in this buffer, that is limit - position .

Usage

From source file:org.apache.hadoop.hbase.KeyValueUtil.java

/**
 * Creates a new KeyValue object positioned in the supplied ByteBuffer and sets the ByteBuffer's
 * position to the start of the next KeyValue. Does not allocate a new array or copy data.
 * @param bb/*from  w  ww  . j a va2s  . c  om*/
 * @param includesMvccVersion
 * @param includesTags
 */
public static KeyValue nextShallowCopy(final ByteBuffer bb, final boolean includesMvccVersion,
        boolean includesTags) {
    if (bb.isDirect()) {
        throw new IllegalArgumentException("only supports heap buffers");
    }
    if (bb.remaining() < 1) {
        return null;
    }
    KeyValue keyValue = null;
    int underlyingArrayOffset = bb.arrayOffset() + bb.position();
    int keyLength = bb.getInt();
    int valueLength = bb.getInt();
    ByteBufferUtils.skip(bb, keyLength + valueLength);
    int tagsLength = 0;
    if (includesTags) {
        // Read short as unsigned, high byte first
        tagsLength = ((bb.get() & 0xff) << 8) ^ (bb.get() & 0xff);
        ByteBufferUtils.skip(bb, tagsLength);
    }
    int kvLength = (int) KeyValue.getKeyValueDataStructureSize(keyLength, valueLength, tagsLength);
    keyValue = new KeyValue(bb.array(), underlyingArrayOffset, kvLength);
    if (includesMvccVersion) {
        long mvccVersion = ByteBufferUtils.readVLong(bb);
        keyValue.setSequenceId(mvccVersion);
    }
    return keyValue;
}

From source file:byps.BWire.java

/**
 * Reads a ByteBuffer from an InputStream
 * Closes the InputStream.//from ww w .j  a v a  2 s . c  o  m
 * @param is
 * @return
 * @throws IOException
 */
public static ByteBuffer bufferFromStream(InputStream is, Boolean gzip) throws IOException {
    if (is == null)
        return null;
    try {
        ByteBuffer ibuf = ByteBuffer.allocate(10 * 1000);

        if (gzip != null) {
            if (gzip) {
                is = new GZIPInputStream(is);
            }
        } else {
            if (!is.markSupported())
                is = new BufferedInputStream(is, 2);
            is.mark(2);
            int magic = is.read() | (is.read() << 8);
            is.reset();
            if (magic == GZIPInputStream.GZIP_MAGIC) {
                is = new GZIPInputStream(is);
            }
        }

        ReadableByteChannel rch = Channels.newChannel(is);
        while (rch.read(ibuf) != -1) {
            if (ibuf.remaining() == 0) {
                ByteBuffer nbuf = ByteBuffer.allocate(ibuf.capacity() * 2);
                ibuf.flip();
                nbuf.put(ibuf);
                ibuf = nbuf;
            }
        }

        ibuf.flip();
        return ibuf;
    } finally {
        is.close();
    }
}

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

public static InputStream inputStream(ByteBuffer bytes) {
    final ByteBuffer copy = bytes.duplicate();

    return new InputStream() {
        public int read() throws IOException {
            if (!copy.hasRemaining())
                return -1;

            return copy.get() & 0xFF;
        }/*  w  w w  . ja  va2  s  . c om*/

        @Override
        public int read(byte[] bytes, int off, int len) throws IOException {
            if (!copy.hasRemaining())
                return -1;

            len = Math.min(len, copy.remaining());
            copy.get(bytes, off, len);
            return len;
        }

        @Override
        public int available() throws IOException {
            return copy.remaining();
        }
    };
}

From source file:com.FalcoLabs.Fido.api.datastore.serializers.BinarySerializer.java

@SuppressWarnings("unchecked")
public T fromByteBuffer(ByteBuffer byteBuffer) {
    byte[] bytes = new byte[byteBuffer.remaining()];
    byteBuffer.get(bytes);/*from  w  w w .j a va  2  s  .  c o m*/
    Object obj = SerializationUtils.deserialize(bytes);
    return (T) obj;
}

From source file:org.elasticsoftware.elasticactors.base.serialization.JacksonMessageDeserializer.java

@Override
public T deserialize(ByteBuffer serializedObject) throws IOException {
    byte[] buf = new byte[serializedObject.remaining()];
    serializedObject.get(buf);/*from  w w  w .j a va  2 s . c  om*/
    return objectMapper.readValue(buf, objectClass);
}

From source file:org.apache.cassandra.db.marshal.DateType.java

public int compare(ByteBuffer o1, ByteBuffer o2) {
    if (o1.remaining() == 0) {
        return o2.remaining() == 0 ? 0 : -1;
    }/*from  www  .  j  av  a2  s .  c  o  m*/
    if (o2.remaining() == 0) {
        return 1;
    }

    return ByteBufferUtil.compareUnsigned(o1, o2);
}

From source file:org.apache.cassandra.serializers.TimestampSerializer.java

public Date deserialize(ByteBuffer bytes) {
    return bytes.remaining() == 0 ? null : new Date(ByteBufferUtil.toLong(bytes));
}

From source file:com.offbynull.portmapper.natpmp.NatPmpResponse.java

/**
 * Constructs a {@link NatPmpResponse} object by parsing a buffer.
 * @param buffer buffer containing NAT-PMP response data
 * @throws NullPointerException if any argument is {@code null}
 * @throws BufferUnderflowException if not enough data is available in {@code buffer}
 * @throws IllegalArgumentException if the version doesn't match the expected version (must always be {@code 0}), or if the op is
 * {@code < 128}, or if there's an unsuccessful/unrecognized result code
 *//*ww w. jav a2  s.  co  m*/
NatPmpResponse(ByteBuffer buffer) {
    Validate.notNull(buffer);

    if (buffer.remaining() < 2) {
        throw new IllegalArgumentException("Bad packet size: " + buffer.remaining());
    }

    int version = buffer.get() & 0xFF;
    Validate.isTrue(version == 0, "Unknown version: %d", version);

    op = buffer.get() & 0xFF;
    Validate.isTrue(op >= 128, "Op must be >= 128: %d", op);

    int resultCodeNum = buffer.getShort() & 0xFFFF;
    NatPmpResultCode[] resultCodes = NatPmpResultCode.values();

    Validate.isTrue(resultCodeNum < resultCodes.length, "Unknown result code encountered: %d", resultCodeNum);
    Validate.isTrue(resultCodeNum == NatPmpResultCode.SUCCESS.ordinal(), "Unsuccessful result code: %s [%s]",
            resultCodes[resultCodeNum].toString(), resultCodes[resultCodeNum].getMessage());

    secondsSinceStartOfEpoch = buffer.getInt() & 0xFFFFFFFFL;
}

From source file:com.ntsync.shared.RawContact.java

private static String readRawString(ByteBuffer src) throws UnsupportedEncodingException {
    if (src != null) {
        int len = src.remaining();
        if (len >= 0) {
            byte[] output = new byte[len];
            src.get(output, 0, len);//from  w w w. ja  v  a 2  s  .  co m
            // Android has UTF-8 as default
            return new String(output, SyncDataHelper.DEFAULT_CHARSET_NAME);
        }
    }
    return null;
}

From source file:org.apache.cassandra.serializers.TimestampSerializer.java

public void validate(ByteBuffer bytes) throws MarshalException {
    if (bytes.remaining() != 8 && bytes.remaining() != 0)
        throw new MarshalException(String.format("Expected 8 or 0 byte long for date (%d)", bytes.remaining()));
}