com.amazon.redshift.util

Class ByteConverter

java.lang.Object

com.amazon.redshift.util.ByteConverter

public class ByteConverter
extends Object

Helper methods to parse java base types from byte arrays.

Author:

Mikko Tiihonen

Method Summary

Modifier and Type	Method and Description
static boolean	bool(byte[] bytes, int idx) Parses a boolean value from the byte array.
static void	bool(byte[] target, int idx, boolean value) Encodes a boolean value to the byte array.
static int	bytesToInt(byte[] bytes) Convert a variable length array of bytes to an integer
static float	float4(byte[] bytes, int idx) Parses a float value from the byte array.
static void	float4(byte[] target, int idx, float value) Encodes a int value to the byte array.
static double	float8(byte[] bytes, int idx) Parses a double value from the byte array.
static void	float8(byte[] target, int idx, double value) Encodes a int value to the byte array.
static short	int2(byte[] bytes, int idx) Parses a short value from the byte array.
static void	int2(byte[] target, int idx, int value) Encodes a int value to the byte array.
static int	int4(byte[] bytes, int idx) Parses an int value from the byte array.
static void	int4(byte[] target, int idx, int value) Encodes a int value to the byte array.
static long	int8(byte[] bytes, int idx) Parses a long value from the byte array.
static void	int8(byte[] target, int idx, long value) Encodes a long value to the byte array.
static Number	numeric(byte[] bytes) Convert a variable length array of bytes to an integer
static Number	numeric(byte[] bytes, int pos, int numBytes) Convert a variable length array of bytes to an integer
static byte[]	redshiftNumeric(BigDecimal val, int precision, int scale) Convert BigDecimal value into scaled bytes.
static Number	redshiftNumeric(byte[] bytes, int precision, int scale) Convert a variable length array of bytes to a Number
static Number	redshiftNumeric(byte[] bytes, int pos, int numBytes, int precision, int scale) Convert a variable length array of bytes to a Number

Methods inherited from class java.lang.Object

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

Method Detail

bytesToInt

public static int bytesToInt(byte[] bytes)

Convert a variable length array of bytes to an integer

Parameters:

bytes - array of bytes that can be decoded as an integer

Returns:

integer

numeric

public static Number numeric(byte[] bytes)

Convert a variable length array of bytes to an integer

Parameters:

bytes - array of bytes that can be decoded as an integer

Returns:

integer

redshiftNumeric

public static Number redshiftNumeric(byte[] bytes,
                                     int precision,
                                     int scale)

Convert a variable length array of bytes to a Number

Parameters:

bytes - array of column bytes that can be decoded as Numeric

precision - precision of the defined column

scale - scale of the defined column

Returns:

Number value of the given unscaled byte array

numeric

public static Number numeric(byte[] bytes,
                             int pos,
                             int numBytes)

Convert a variable length array of bytes to an integer

Parameters:

bytes - array of bytes that can be decoded as an integer

pos - index of the start position of the bytes array for number

numBytes - number of bytes to use, length is already encoded in the binary format but this is used for double checking

Returns:

integer

redshiftNumeric

public static Number redshiftNumeric(byte[] bytes,
                                     int pos,
                                     int numBytes,
                                     int precision,
                                     int scale)

Convert a variable length array of bytes to a Number

Parameters:

bytes - array of column bytes that can be decoded as Numeric

pos - index of the start position of the bytes array for number

numBytes - number of bytes to use, length is already encoded in the binary format but this is used for double checking

precision - precision of the defined column

scale - scale of the defined column

Returns:

Number value of the given unscaled byte array

redshiftNumeric

public static byte[] redshiftNumeric(BigDecimal val,
                                     int precision,
                                     int scale)

Convert BigDecimal value into scaled bytes.

Parameters:

val - BigDecimal value to be converted into bytes

precision - Precision of column

scale - Scale of column

Returns:

Scaled bytes of the given BigDecimal value.

int8

public static long int8(byte[] bytes,
                        int idx)

Parses a long value from the byte array.

Parameters:

bytes - The byte array to parse.

idx - The starting index of the parse in the byte array.

Returns:

parsed long value.

int4

public static int int4(byte[] bytes,
                       int idx)

Parses an int value from the byte array.

Parameters:

bytes - The byte array to parse.

idx - The starting index of the parse in the byte array.

Returns:

parsed int value.

int2

public static short int2(byte[] bytes,
                         int idx)

Parses a short value from the byte array.

Parameters:

bytes - The byte array to parse.

idx - The starting index of the parse in the byte array.

Returns:

parsed short value.

bool

public static boolean bool(byte[] bytes,
                           int idx)

Parses a boolean value from the byte array.

Parameters:

bytes - The byte array to parse.

idx - The starting index to read from bytes.

Returns:

parsed boolean value.

float4

public static float float4(byte[] bytes,
                           int idx)

Parses a float value from the byte array.

Parameters:

bytes - The byte array to parse.

idx - The starting index of the parse in the byte array.

Returns:

parsed float value.

float8

public static double float8(byte[] bytes,
                            int idx)

Parses a double value from the byte array.

Parameters:

bytes - The byte array to parse.

idx - The starting index of the parse in the byte array.

Returns:

parsed double value.

int8

public static void int8(byte[] target,
                        int idx,
                        long value)

Encodes a long value to the byte array.

Parameters:

target - The byte array to encode to.

idx - The starting index in the byte array.

value - The value to encode.

int4

public static void int4(byte[] target,
                        int idx,
                        int value)

Encodes a int value to the byte array.

Parameters:

target - The byte array to encode to.

idx - The starting index in the byte array.

value - The value to encode.

int2

public static void int2(byte[] target,
                        int idx,
                        int value)

Encodes a int value to the byte array.

Parameters:

target - The byte array to encode to.

idx - The starting index in the byte array.

value - The value to encode.

bool

public static void bool(byte[] target,
                        int idx,
                        boolean value)

Encodes a boolean value to the byte array.

Parameters:

target - The byte array to encode to.

idx - The starting index in the byte array.

value - The value to encode.

float4

public static void float4(byte[] target,
                          int idx,
                          float value)

Encodes a int value to the byte array.

Parameters:

target - The byte array to encode to.

idx - The starting index in the byte array.

value - The value to encode.

float8

public static void float8(byte[] target,
                          int idx,
                          double value)

Encodes a int value to the byte array.

Parameters:

target - The byte array to encode to.

idx - The starting index in the byte array.

value - The value to encode.