org.jpos.iso
Class BcdPrefixer

java.lang.Object
  org.jpos.iso.BcdPrefixer

All Implemented Interfaces:

Prefixer

public class BcdPrefixer
extends java.lang.Object
implements Prefixer

BcdPrefixer constructs a prefix storing the length in BCD.

Version:

$Revision: 2594 $ $Date: 2008-01-22 08:41:31 -0800 (Tue, 22 Jan 2008) $

Author:

joconnor

Field Summary

static BcdPrefixer	L A length prefixer for upto 9 chars.
static BcdPrefixer	LL A length prefixer for upto 99 chars.
static BcdPrefixer	LLL A length prefixer for upto 999 chars.
static BcdPrefixer	LLLL A length prefixer for upto 9999 chars.
static BcdPrefixer	LLLLL A length prefixer for upto 99999 chars.

Constructor Summary

BcdPrefixer(int nDigits)

Method Summary

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 java.lang.Object

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

Field Detail

L

public static final BcdPrefixer L

A length prefixer for upto 9 chars. The length is encoded with 1 ASCII char representing 1 decimal digit.

LL

public static final BcdPrefixer LL

A length prefixer for upto 99 chars. The length is encoded with 2 ASCII chars representing 2 decimal digits.

LLL

public static final BcdPrefixer LLL

A length prefixer for upto 999 chars. The length is encoded with 3 ASCII chars representing 3 decimal digits.

LLLL

public static final BcdPrefixer LLLL

A length prefixer for upto 9999 chars. The length is encoded with 4 ASCII chars representing 4 decimal digits.

LLLLL

public static final BcdPrefixer LLLLL

A length prefixer for upto 99999 chars. The length is encoded with 5 ASCII chars representing 5 decimal digits.

Constructor Detail

BcdPrefixer

public BcdPrefixer(int nDigits)

Method Detail

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