com.perforce.p4java.impl.mapbased.rpc.sys

Class RpcCRC32Checksum

java.lang.Object

java.util.zip.CRC32

com.perforce.p4java.impl.mapbased.rpc.sys.RpcCRC32Checksum

All Implemented Interfaces:

java.util.zip.Checksum

public class RpcCRC32Checksum
extends java.util.zip.CRC32

Provides a wrapper to the basic Java CRC32 to allow us to use the JZlib pure Java implementation of the CRC32 checksum from RFC1952.

This avoids the basic Java CRC32's JNI overhead for certain uses of checksumming where many small pieces of data are checksummed in succession.

Constructor Summary

Constructors

Constructor and Description
RpcCRC32Checksum() Creates a new RpcCRC32Checksum object.

Method Summary

Modifier and Type	Method and Description
long	getValue() Returns CRC-32 value.
void	reset() Resets Rpc CRC-32 to initial value.
void	update(byte[] b) Updates the Rpc CRC-32 checksum with the specified array of bytes.
void	update(byte[] b, int off, int len) Updates the Rpc CRC-32 checksum with the specified array of bytes.
void	update(int b) Updates the Rpc CRC-32 checksum with the specified byte (the low eight bits of the argument b).

Methods inherited from class java.util.zip.CRC32

update

Methods inherited from class java.lang.Object

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

Constructor Detail

RpcCRC32Checksum

public RpcCRC32Checksum()

Creates a new RpcCRC32Checksum object.

Method Detail

update

public void update(int b)

Updates the Rpc CRC-32 checksum with the specified byte (the low eight bits of the argument b).

Specified by:

update in interface java.util.zip.Checksum

Overrides:

update in class java.util.zip.CRC32

Parameters:

b - the byte to update the checksum with

update

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

Updates the Rpc CRC-32 checksum with the specified array of bytes.

Specified by:

update in interface java.util.zip.Checksum

Overrides:

update in class java.util.zip.CRC32

update

public void update(byte[] b)

Updates the Rpc CRC-32 checksum with the specified array of bytes.

Overrides:

update in class java.util.zip.CRC32

Parameters:

b - the array of bytes to update the checksum with

reset

public void reset()

Resets Rpc CRC-32 to initial value.

Specified by:

reset in interface java.util.zip.Checksum

Overrides:

reset in class java.util.zip.CRC32

getValue

public long getValue()

Returns CRC-32 value.

Specified by:

getValue in interface java.util.zip.Checksum

Overrides:

getValue in class java.util.zip.CRC32