brf.j2me.dynaworks.db
Class RecordField

java.lang.Object
  |
  +--brf.j2me.dynaworks.db.RecordField

Direct Known Subclasses:

BytesField, IntegerField, ShortField, StringField

public abstract class RecordField

extends java.lang.Object

Defines the base class of a record field.

Version:

1.0a1

Author:

Bernd R. Fix

See Also:

Record, StringField, IntegerField, BytesField, ShortField

Field Summary

protected int

size 'byte' length of the field data.

Constructor Summary

RecordField()

Method Summary

boolean	fromImage(byte[] m) Convert a byte array into field data.
int	getExpectedSize(byte[] data, int pos) returns the expected length of a field starting at position 'pos' in the byte array 'data'.
int	getSize() Return the size of a record field.
byte[]	toImage() Convert the field data into a byte array.

Methods inherited from class java.lang.Object

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

Field Detail

size

protected int size

'byte' length of the field data.

Constructor Detail

RecordField

public RecordField()

Method Detail

getSize

public int getSize()

Return the size of a record field.

Returns:

int - byte length of the field data.

getExpectedSize

public int getExpectedSize(byte[] data,
                           int pos)

returns the expected length of a field starting at position 'pos' in the byte array 'data'.

Parameters:

data - byte[] - byte representation of record.

pos - int - offset into array

Returns:

int - expected length of field

toImage

public byte[] toImage()

Convert the field data into a byte array.

Returns:

byte[] - byte array containing the field data.

fromImage

public boolean fromImage(byte[] m)

Convert a byte array into field data.

Parameters:

m - byte[] - array holding the data.

Returns:

boolean - conversion successful?