org.jpos.iso
Interface Prefixer

All Known Implementing Classes:

AsciiPrefixer, BcdPrefixer, BinaryPrefixer, EbcdicPrefixer, NullPrefixer

public interface Prefixer

This interface is used to encode and decode length prefixes.

Version:

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

Author:

joconnor

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.

Method Detail

encodeLength

void encodeLength(int length,
                  byte[] b)
                  throws ISOException

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

Parameters:

length - The length to be encoded.

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

Throws:

ISOException

decodeLength

int decodeLength(byte[] b,
                 int offset)
                 throws ISOException

Decodes an encoded length.

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.

Throws:

ISOException

getPackedLength

int getPackedLength()

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