org.jpos.iso

Interface Prefixer

All Known Implementing Classes:

AsciiPrefixer, BcdPrefixer, BinaryPrefixer, EbcdicPrefixer, HexNibblesPrefixer, IF_FBINARY.FullyConsumingPrefixer, IF_FCHAR.FullyConsumingPrefixer, NullPrefixer

public interface Prefixer

This interface is used to encode and decode length prefixes.

Method Summary

Modifier and Type	Method and 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.

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.