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 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	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

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	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

Methods inherited from interface java.util.zip.Checksum
update, update

- 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()
```