alluxio.util.io

Class ByteIOUtils

java.lang.Object

alluxio.util.io.ByteIOUtils

@ThreadSafe
public final class ByteIOUtils
extends Object

A collection of utility functions to read/write primitive values from/to a byte array.

Method Summary

Modifier and Type	Method and Description
static byte	readByte(byte[] buf, int pos) Reads a specific byte value from the input byte array at the given offset.
static byte	readByte(ByteBuffer buf, int pos) Reads a specific byte value from the input byte buffer at the given offset.
static int	readInt(byte[] buf, int pos) Reads a specific integer byte value (4 bytes) from the input byte array at the given offset.
static int	readInt(ByteBuffer buf, int pos) Reads a specific integer byte value (4 bytes) from the input byte buffer at the given offset.
static long	readLong(byte[] buf, int pos) Reads a specific long byte value (8 bytes) from the input byte array at the given offset.
static short	readShort(byte[] buf, int pos) Reads a specific short byte value (2 bytes) from the input byte array at the given offset.
static void	writeByte(byte[] buf, int pos, byte v) Writes a single byte value (1 byte) to the output byte array at the given offset.
static void	writeByte(ByteBuffer buf, int pos, byte v) Writes a single byte value (1 byte) to the output byte buffer at the given offset.
static void	writeByte(OutputStream out, byte v) Writes a single byte value (1 byte) to the output stream.
static void	writeInt(byte[] buf, int pos, int v) Writes a specific integer value (4 bytes) to the output byte array at the given offset.
static void	writeInt(ByteBuffer buf, int pos, int v) Writes a specific integer value (4 bytes) to the output byte buffer at the given offset.
static void	writeInt(OutputStream out, int v) Writes a specific integer value (4 bytes) to the output stream.
static void	writeLong(byte[] buf, int pos, long v) Writes a specific long value (8 bytes) to the output byte array at the given offset.
static void	writeLong(OutputStream out, long v) Writes a specific long value (8 bytes) to the output stream.
static void	writeShort(byte[] buf, int pos, short v) Writes a specific short value (2 bytes) to the output byte buffer at the given offset.
static void	writeShort(OutputStream out, short v) Writes a specific short value (2 bytes) to the output stream.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

readByte

public static byte readByte(byte[] buf,
                            int pos)

Reads a specific byte value from the input byte array at the given offset.

Parameters:

buf - input byte array

pos - offset into the byte buffer to read

Returns:

the byte value read

readByte

public static byte readByte(ByteBuffer buf,
                            int pos)

Reads a specific byte value from the input byte buffer at the given offset.

Parameters:

buf - input byte buffer

pos - offset into the byte buffer to read

Returns:

the byte value read

readShort

public static short readShort(byte[] buf,
                              int pos)

Reads a specific short byte value (2 bytes) from the input byte array at the given offset.

Parameters:

buf - input byte buffer

pos - offset into the byte buffer to read

Returns:

the short value read

readInt

public static int readInt(byte[] buf,
                          int pos)

Reads a specific integer byte value (4 bytes) from the input byte array at the given offset.

Parameters:

buf - input byte array

pos - offset into the byte buffer to read

Returns:

the int value read

readInt

public static int readInt(ByteBuffer buf,
                          int pos)

Reads a specific integer byte value (4 bytes) from the input byte buffer at the given offset.

Parameters:

buf - input byte buffer

pos - offset into the byte buffer to read

Returns:

the int value read

readLong

public static long readLong(byte[] buf,
                            int pos)

Reads a specific long byte value (8 bytes) from the input byte array at the given offset.

Parameters:

buf - input byte buffer

pos - offset into the byte buffer to read

Returns:

the long value read

writeByte

public static void writeByte(byte[] buf,
                             int pos,
                             byte v)

Writes a single byte value (1 byte) to the output byte array at the given offset.

Parameters:

buf - output byte buffer

pos - offset into the byte buffer to write

v - byte value to write

writeByte

public static void writeByte(ByteBuffer buf,
                             int pos,
                             byte v)

Writes a single byte value (1 byte) to the output byte buffer at the given offset.

Parameters:

buf - output byte buffer

pos - offset into the byte buffer to write

v - byte value to write

writeByte

public static void writeByte(OutputStream out,
                             byte v)
                      throws IOException

Writes a single byte value (1 byte) to the output stream. This is equivalent of OutputStream.write(int).

Parameters:

out - output stream

v - byte value to write

Throws:

IOException

writeShort

public static void writeShort(byte[] buf,
                              int pos,
                              short v)

Writes a specific short value (2 bytes) to the output byte buffer at the given offset.

Parameters:

buf - output byte buffer

pos - offset into the byte buffer to write

v - short value to write

writeShort

public static void writeShort(OutputStream out,
                              short v)
                       throws IOException

Writes a specific short value (2 bytes) to the output stream.

Parameters:

out - output stream

v - short value to write

Throws:

IOException

writeInt

public static void writeInt(byte[] buf,
                            int pos,
                            int v)

Writes a specific integer value (4 bytes) to the output byte array at the given offset.

Parameters:

buf - output byte array

pos - offset into the byte buffer to write

v - int value to write

writeInt

public static void writeInt(ByteBuffer buf,
                            int pos,
                            int v)

Writes a specific integer value (4 bytes) to the output byte buffer at the given offset.

Parameters:

buf - output byte buffer

pos - offset into the byte buffer to write

v - int value to write

writeInt

public static void writeInt(OutputStream out,
                            int v)
                     throws IOException

Writes a specific integer value (4 bytes) to the output stream.

Parameters:

out - output stream

v - integer value to write

Throws:

IOException

writeLong

public static void writeLong(byte[] buf,
                             int pos,
                             long v)

Writes a specific long value (8 bytes) to the output byte array at the given offset.

Parameters:

buf - output byte array

pos - offset into the byte buffer to write

v - long value to write

writeLong

public static void writeLong(OutputStream out,
                             long v)
                      throws IOException

Writes a specific long value (8 bytes) to the output stream.

Parameters:

out - output stream

v - long value to write

Throws:

IOException