org.apache.lucene.store

Class BufferedChecksum

java.lang.Object

org.apache.lucene.store.BufferedChecksum

All Implemented Interfaces:

java.util.zip.Checksum

public class BufferedChecksum
extends java.lang.Object
implements java.util.zip.Checksum

Wraps another Checksum with an internal buffer to speed up checksum calculations.

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	buffer
static int	DEFAULT_BUFFERSIZE Default buffer size: 256
private java.util.zip.Checksum	in
private int	upto

Constructor Summary

Constructors

Constructor and Description
BufferedChecksum(java.util.zip.Checksum in) Create a new BufferedChecksum with DEFAULT_BUFFERSIZE
BufferedChecksum(java.util.zip.Checksum in, int bufferSize) Create a new BufferedChecksum with the specified bufferSize

Method Summary

Modifier and Type	Method and Description
private void	flush()
long	getValue()
void	reset()
void	update(byte[] b, int off, int len)
void	update(int b)

Methods inherited from class java.lang.Object

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

Field Detail

in

private final java.util.zip.Checksum in

buffer

private final byte[] buffer

upto

private int upto

DEFAULT_BUFFERSIZE

public static final int DEFAULT_BUFFERSIZE

Default buffer size: 256

See Also:

Constant Field Values

Constructor Detail

BufferedChecksum

public BufferedChecksum(java.util.zip.Checksum in)

Create a new BufferedChecksum with DEFAULT_BUFFERSIZE

BufferedChecksum

public BufferedChecksum(java.util.zip.Checksum in,
                        int bufferSize)

Create a new BufferedChecksum with the specified bufferSize

Method Detail

update

public void update(int b)

Specified by:

update in interface java.util.zip.Checksum

update

public void update(byte[] b,
                   int off,
                   int len)

Specified by:

update in interface java.util.zip.Checksum

getValue

public long getValue()

Specified by:

getValue in interface java.util.zip.Checksum

reset

public void reset()

Specified by:

reset in interface java.util.zip.Checksum

flush

private void flush()