Example usage for java.nio ByteBuffer getInt

Introduction

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

Prototype

public abstract int getInt();

Source Link

Document

Returns the int at the current position and increases the position by 4.

Usage

From source file:org.apache.myriad.state.utils.ByteBufferSupport.java

/**
 * This assumes the next position is the size as an int, and the following is a string
 * iff the size is not zero.//  w w w  .j a v  a  2s  .co m
 *
 * @param bb ByteBuffer to extract string from
 * @return string from the next position, or "" if the size is zero
 */
public static String toString(ByteBuffer bb) {
    byte[] bytes = new byte[bb.getInt()];
    String s = "";
    try {
        if (bytes.length > 0) {
            bb.get(bytes);
            s = new String(bytes, UTF8);
        }
    } catch (Exception e) {
        throw new RuntimeException("ByteBuffer not in expected format," + " failed to parse string bytes", e);
    }
    return s;
}

From source file:alluxio.util.FormatUtils.java

/**
 * Parses a {@link ByteBuffer} into a {@link String}. In particular, the function prints the
 * content of the buffer in 4-byte increments as space separated integers.
 *
 * @param buf buffer to use/*from  w w  w  . j ava 2 s.  c o  m*/
 * @return the String representation of the {@link ByteBuffer}
 */
public static String byteBufferToString(ByteBuffer buf) {
    StringBuilder sb = new StringBuilder();
    for (int k = 0; k < buf.limit() / 4; k++) {
        if (k != 0) {
            sb.append(" ");
        }
        sb.append(buf.getInt());
    }
    return sb.toString();
}

From source file:com.openteach.diamond.network.waverider.command.Command.java

/**
 * ByteBuffer??/*from   w w  w  . jav a 2 s.c o m*/
 * @param buffer
 * @return
 */
public static Command unmarshall(ByteBuffer buffer) {
    if (buffer.remaining() < getHeaderSize()) {
        throw new RuntimeException("Wrong command.");
    }
    Command command = new Command();
    command.setType(buffer.getLong());
    command.setLength(buffer.getInt());
    // (payLoad)array()
    command.setPayLoad(buffer.slice());
    return command;
}

From source file:edu.umass.cs.gigapaxos.paxosutil.PaxosPacketDemultiplexerFast.java

private static PaxosPacket toPaxosPacket(byte[] bytes)
        throws UnsupportedEncodingException, UnknownHostException {
    assert (bytes != null);
    ByteBuffer bbuf = ByteBuffer.wrap(bytes);

    PaxosPacket.PaxosPacketType type = bbuf.getInt() == PaxosPacketType.PAXOS_PACKET.getInt()
            ? PaxosPacketType.getPaxosPacketType(bbuf.getInt())
            : null;/* ww  w .  j  a v  a  2 s. c om*/

    if (type == null)
        fatal(bytes);

    // bbuf = ByteBuffer.wrap(bytes);
    bbuf.rewind();

    PaxosPacket paxosPacket = null;
    switch (type) {
    case REQUEST:
        // log.info("before new RequestPacket(ByteBuffer)");
        paxosPacket = new RequestPacket(bbuf);
        // log.info("after new RequestPacket(ByteBuffer)");
        break;
    case ACCEPT:
        paxosPacket = new AcceptPacket(bbuf);
        break;
    case BATCHED_COMMIT:
        paxosPacket = new BatchedCommit(bbuf);
        break;
    case BATCHED_ACCEPT_REPLY:
        paxosPacket = new BatchedAcceptReply(bbuf);
        break;

    default:
        assert (false);
    }
    return paxosPacket;
}

From source file:org.apache.myriad.state.utils.ByteBufferSupport.java

public static Constraint getConstraint(ByteBuffer bb) {
    Constraint.Type type = Constraint.Type.values()[bb.getInt()];
    String p = toString(bb);//from   w  ww  .  j  a  va  2  s.  co  m
    switch (type) {
    case NULL:
        return null;

    case LIKE:

        if (!StringUtils.isEmpty(p)) {
            return gson.fromJson(p, LikeConstraint.class);
        }
    }
    return null;
}

From source file:com.nridge.core.base.std.BufUtl.java

/**
 * Retrieves the operation code stored within the header of the
 * <code>ByteBuffer</code> object.
 *
 * @param aBuffer Packet byte buffer object.
 * @return Application specific operation code value.
 *//*from  www .j av a 2 s .c o  m*/
public static int getOpCode(ByteBuffer aBuffer) {
    int opCode;

    if (aBuffer == null)
        return -1;
    else {
        aBuffer.mark();
        aBuffer.position(0);
        opCode = aBuffer.getInt();
        aBuffer.reset();

        return opCode;
    }
}

From source file:org.apache.myriad.state.utils.ByteBufferSupport.java

/**
 * Assumes the entire ByteBuffer is a TaskID.
 *
 * @param bb// www .  j  av  a 2s .co  m
 * @return Protos.TaskID
 */
public static Protos.TaskID toTaskId(ByteBuffer bb) {
    try {
        return Protos.TaskID.parseFrom(getBytes(bb, bb.getInt()));
    } catch (Exception e) {
        throw new RuntimeException("Failed to parse Task ID", e);
    }
}

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

/**
* Reads a size from a reversed byte order, such as block size in the block header
*
* @param byteSize byte array with a length of exactly 4 
* 
* @return size, returns 0 in case of invalid block size
*
*//*from w w w.  j  a v a  2  s  . com*/

public static long getSize(byte[] byteSize) {
    if (byteSize.length != 4)
        return 0;
    ByteBuffer converterBuffer = ByteBuffer.wrap(byteSize);
    converterBuffer.order(ByteOrder.LITTLE_ENDIAN);
    return convertSignedIntToUnsigned(converterBuffer.getInt());
}

From source file:org.apache.myriad.state.utils.ByteBufferSupport.java

/**
 * Assumes the entire ByteBuffer is a FrameworkID.
 *
 * @param bb//from w  ww .ja v a  2 s . co m
 * @return Protos.FrameworkID
 */
public static Protos.FrameworkID toFrameworkID(ByteBuffer bb) {
    try {
        return Protos.FrameworkID.parseFrom(getBytes(bb, bb.getInt()));
    } catch (Exception e) {
        throw new RuntimeException("Failed to parse Framework ID", e);
    }
}

From source file:com.nridge.core.base.std.BufUtl.java

/**
 * Retrieves the operation version code stored within the header of the
 * <code>ByteBuffer</code> object.
 *
 * @param aBuffer Packet byte buffer object.
 * @return Application specific operation code version value.
 *//*from   www  . j a v  a2 s . com*/
@SuppressWarnings({ "UnusedAssignment" })
public static int getVersion(ByteBuffer aBuffer) {
    int opCode, versionId;

    if (aBuffer == null)
        return -1;
    else {
        aBuffer.mark();
        aBuffer.position(0);
        opCode = aBuffer.getInt();
        versionId = aBuffer.getInt();
        aBuffer.reset();

        return versionId;
    }
}