Class BcdPrefixer

java.lang.Object

org.jpos.iso.BcdPrefixer

All Implemented Interfaces:

Prefixer

public class BcdPrefixer
extends Object
implements Prefixer

BcdPrefixer constructs a prefix storing the length in BCD.

Field Summary

Fields

Modifier and Type	Field	Description
static final BcdPrefixer	L	A length prefixer for up to 9 chars.
static final BcdPrefixer	LL	A length prefixer for up to 99 chars.
static final BcdPrefixer	LLL	A length prefixer for up to 999 chars.
static final BcdPrefixer	LLLL	A length prefixer for up to 9999 chars.
static final BcdPrefixer	LLLLL	A length prefixer for up to 99999 chars.
static final BcdPrefixer	LLLLLL	A length prefixer for up to 999999 chars.

Constructor Summary

Constructors

Constructor	Description
BcdPrefixer(int nDigits)

Method Summary

Modifier and Type	Method	Description
int	decodeLength(byte[] b, int offset)	Decodes an encoded length.
void	encodeLength(int length, byte[] b)	Fills a byte array with the field length data in raw form.
int	getPackedLength()	Returns the number of bytes taken up by the length encoding.

Methods inherited from class Object

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

Field Details

L

public static final BcdPrefixer L

A length prefixer for up to 9 chars. The length is encoded with 1 BCD digit.

LL

public static final BcdPrefixer LL

A length prefixer for up to 99 chars. The length is encoded with 2 BCD digits.

LLL

public static final BcdPrefixer LLL

A length prefixer for up to 999 chars. The length is encoded with 3 BCD digits.

LLLL

public static final BcdPrefixer LLLL

A length prefixer for up to 9999 chars. The length is encoded with 4 BCD digits.

LLLLL

public static final BcdPrefixer LLLLL

A length prefixer for up to 99999 chars. The length is encoded with 5 BCD digits.

LLLLLL

public static final BcdPrefixer LLLLLL

A length prefixer for up to 999999 chars. The length is encoded with 6 BCD digits.

Constructor Details

BcdPrefixer

public BcdPrefixer(int nDigits)

Method Details

encodeLength

public void encodeLength(int length,
 byte[] b)

Description copied from interface: Prefixer

Fills a byte array with the field length data in raw form.

Specified by:

encodeLength in interface Prefixer

Parameters:

length - The length to be encoded.

b - The byte array to fill with the encoded length.

decodeLength

public int decodeLength(byte[] b,
 int offset)

Description copied from interface: Prefixer

Decodes an encoded length.

Specified by:

decodeLength in interface Prefixer

Parameters:

b - The byte array to scan for the length.

offset - The offset to start scanning from.

Returns:

The length in chars of the field data to follow this LengthPrefix.

getPackedLength

public int getPackedLength()

Description copied from interface: Prefixer

Returns the number of bytes taken up by the length encoding.

Specified by:

getPackedLength in interface Prefixer