org.postgresql.util

Class ByteConverter

java.lang.Object

org.postgresql.util.ByteConverter

public class ByteConverter
extends Object

Helper methods to parse java base types from byte arrays.

Author:

Mikko Tiihonen

Method Summary

Methods

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

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

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

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.