PureJavaCrc32 (Ignite 2.17.0)

java.lang.Object
- org.apache.ignite.internal.processors.cache.persistence.wal.crc.PureJavaCrc32

```
@Deprecated
public class PureJavaCrc32
extends Object
```
Deprecated.
Use FastCrc instead.

This class was taken from Hadoop org.apache.hadoop.util.PureJavaCrc32 A pure-java implementation of the CRC32 checksum that uses the same polynomial as the built-in native CRC32. This is to avoid the JNI overhead for certain uses of Checksumming where many small pieces of data are checksummed in succession. The current version is ~10x to 1.8x as fast as Sun's native java.util.zip.CRC32 in Java 1.6

Constructor Summary

Constructors
Constructor Description

PureJavaCrc32()
Deprecated.

Create a new PureJavaCrc32 object.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static int`	`calcCrc32(ByteBuffer b, int len)`	Deprecated. Calculates CRC32 checksum.
`int`	`getValue()`	Deprecated. return crc32 value
`void`	`reset()`	Deprecated. preparation for further calculations
`void`	`update(int b)`	Deprecated.
`void`	`update(ByteBuffer b, int len)`	Deprecated.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PureJavaCrc32
```
public PureJavaCrc32()
```
    Deprecated.
    
    Create a new PureJavaCrc32 object.
- Method Detail
  - getValue
```
public int getValue()
```
    Deprecated.
    
    return crc32 value
  - reset
```
public void reset()
```
    Deprecated.
    
    preparation for further calculations
  - update
```
public void update(ByteBuffer b,
                   int len)
```
    Deprecated.
    
    Parameters:
    
    b - B.
    
    len - Length.
  - update
```
public final void update(int b)
```
    Deprecated.
    
    Parameters:
    
    b - B.
  - calcCrc32
```
public static int calcCrc32(ByteBuffer b,
                            int len)
```
    Deprecated.
    
    Calculates CRC32 checksum. This method will move buffer's position to len bytes forward.
    
    Parameters:
    
    b - B.
    
    len - Length.