Class DatasetFieldPackager

java.lang.Object

org.jpos.iso.ISOFieldPackager

org.jpos.iso.DatasetFieldPackager

public class DatasetFieldPackager
extends ISOFieldPackager

Wraps a regular binary field packager so its payload can be exposed as an ISODatasetField.

Field Summary

Fields

Modifier and Type	Field	Description
protected ISODatasetPackager	datasetPackager	Inner packager that handles the dataset payload (TLV/DBM).
protected ISOFieldPackager	fieldPackager	Outer field packager handling length and transport encoding.

Fields inherited from class ISOFieldPackager

pad, trim

Modifier and Type	Field	Description
protected boolean	pad	When true, values are padded to the field length.
protected boolean	trim	When true, values are trimmed before packing.

Constructor Summary

Constructors

Constructor	Description
DatasetFieldPackager(ISOFieldPackager fieldPackager, ISODatasetPackager datasetPackager)	Creates a dataset-aware field packager.

Method Summary

Modifier and Type	Method	Description
ISOComponent	createComponent(int fieldNumber)	Creates an ISODatasetField for the supplied field number.
ISODatasetPackager	getISODatasetPackager()	Returns the inner dataset payload packager.
ISOFieldPackager	getISOFieldPackager()	Returns the wrapped outer field packager.
int	getMaxPackedLength()	Returns the maximum packed length of the outer field.
byte[]	pack(ISOComponent c)	Packs a dataset field by first encoding the inner dataset payload and then delegating the outer field framing to the wrapped field packager.
int	unpack(ISOComponent c, byte[] b, int offset)	Unpacks a dataset field from a byte array.
void	unpack(ISOComponent c, InputStream in)	Unpacks a dataset field from a stream.

Methods inherited from class ISOFieldPackager

getDescription, getLength, pack, readBytes, setDescription, setLength, setPad, setTrim

Modifier and Type	Method	Description
String	getDescription()	Returns the field description.
int	getLength()	Returns the maximum field length.
void	pack(ISOComponent c, ObjectOutput out)	Packs the component to an ObjectOutput stream.
protected byte[]	readBytes(InputStream in, int l)	Reads exactly l bytes from the input stream.
void	setDescription(String description)	Sets the field description.
void	setLength(int len)	Sets the maximum field length.
void	setPad(boolean pad)	Enables or disables padding for this field.
void	setTrim(boolean trim)	Enables or disables trimming for this field.

Methods inherited from class Object

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

Field Details

datasetPackager

protected ISODatasetPackager datasetPackager

Inner packager that handles the dataset payload (TLV/DBM).

fieldPackager

protected ISOFieldPackager fieldPackager

Outer field packager handling length and transport encoding.

Constructor Details

DatasetFieldPackager

public DatasetFieldPackager(ISOFieldPackager fieldPackager,
 ISODatasetPackager datasetPackager)

Creates a dataset-aware field packager.

Parameters:

fieldPackager - outer field packager used for length and transport encoding

datasetPackager - inner dataset payload packager

Method Details

pack

public byte[] pack(ISOComponent c)
            throws ISOException

Packs a dataset field by first encoding the inner dataset payload and then delegating the outer field framing to the wrapped field packager.

Specified by:

pack in class ISOFieldPackager

Parameters:

c - field component to pack

Returns:

packed field bytes

Throws:

ISOException - on packing errors

unpack

public int unpack(ISOComponent c,
 byte[] b,
 int offset)
           throws ISOException

Unpacks a dataset field from a byte array.

Specified by:

unpack in class ISOFieldPackager

Parameters:

c - destination component

b - source buffer

offset - starting offset

Returns:

number of bytes consumed from the outer field

Throws:

ISOException - on unpacking errors

unpack

public void unpack(ISOComponent c,
 InputStream in)
            throws IOException,
ISOException

Unpacks a dataset field from a stream.

Overrides:

unpack in class ISOFieldPackager

Parameters:

c - destination component

in - source stream

Throws:

IOException - on stream errors

ISOException - on unpacking errors

createComponent

public ISOComponent createComponent(int fieldNumber)

Creates an ISODatasetField for the supplied field number.

Overrides:

createComponent in class ISOFieldPackager

Parameters:

fieldNumber - outer field number

Returns:

dataset field component

getMaxPackedLength

public int getMaxPackedLength()

Returns the maximum packed length of the outer field.

Specified by:

getMaxPackedLength in class ISOFieldPackager

Returns:

maximum packed length

getISODatasetPackager

public ISODatasetPackager getISODatasetPackager()

Returns the inner dataset payload packager.

Returns:

dataset packager

getISOFieldPackager

public ISOFieldPackager getISOFieldPackager()

Returns the wrapped outer field packager.

Returns:

outer field packager