de.uniks.networkparser.bytes

Class Checksum

java.lang.Object

de.uniks.networkparser.bytes.Checksum

Direct Known Subclasses:

Adler32, CRC, FCS16, SHA1, Sum, Xor8

public abstract class Checksum
extends java.lang.Object

Checksum Abstract Class

Field Summary

Fields

Modifier and Type	Field and Description
protected long	length
protected long	value The crc data checksum so far.

Constructor Summary

Constructors

Constructor and Description
Checksum() Creates an AbstractChecksum.

Method Summary

Modifier and Type	Method and Description
byte[]	getByteArray() Returns the result of the computation as byte array.
long	getLength() Returns the length of the processed bytes.
abstract int	getOrder()
long	getValue() Returns the value of the checksum.
void	reset() Resets the checksum to its initial value for further use.
boolean	update(byte b) Updates the checksum with the specified byte.
void	update(byte[] bytes) Updates the current checksum with the specified array of bytes.
void	update(byte[] bytes, int offset, int length) Updates the current checksum with the specified array of bytes.
boolean	update(int data) Updates the checksum with the specified byte.

Methods inherited from class java.lang.Object

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

Field Detail

value

protected long value

The crc data checksum so far.

length

protected long length

Constructor Detail

Checksum

public Checksum()

Creates an AbstractChecksum.

Method Detail

reset

public void reset()

Resets the checksum to its initial value for further use.

update

public boolean update(int data)

Updates the checksum with the specified byte.

Parameters:

data - the byte

Returns:

success to add the new Value

update

public boolean update(byte b)

Updates the checksum with the specified byte.

Parameters:

b - the item to update

Returns:

success

update

public void update(byte[] bytes,
                   int offset,
                   int length)

Updates the current checksum with the specified array of bytes.

Parameters:

bytes - the byte array to update the checksum with

offset - the start offset of the data

length - the number of bytes to use for the update

update

public void update(byte[] bytes)

Updates the current checksum with the specified array of bytes.

Parameters:

bytes - bytearray of items

getValue

public long getValue()

Returns the value of the checksum.

Returns:

the value of checksum

See Also:

getByteArray()

getLength

public long getLength()

Returns the length of the processed bytes.

Returns:

the length of checksum

getByteArray

public byte[] getByteArray()

Returns the result of the computation as byte array.

Returns:

a new ByteArray

getOrder

public abstract int getOrder()

Returns:

the Orderindex