com.emc.esu.api

Class Checksum

java.lang.Object

com.emc.esu.api.Checksum

public class Checksum
extends java.lang.Object

The checksum class is used to store and compute partial checksums when uploading files.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Checksum.Algorithm The hash algorithm to use.

Constructor Summary

Constructors

Constructor and Description
Checksum(Checksum.Algorithm alg)

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getAlgorithmName()
java.lang.String	getExpectedValue() Gets the expected value for this checksum.
void	setExpectedValue(java.lang.String expectedValue) Sets the expected value for this checksum.
java.lang.String	toString() Outputs the current digest checksum in a format suitable for including in Atmos create/update calls.
void	update(byte[] buffer, int offset, int length) Updates the checksum with the given buffer's contents

Methods inherited from class java.lang.Object

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

Constructor Detail

Checksum

public Checksum(Checksum.Algorithm alg)
         throws java.security.NoSuchAlgorithmException

Throws:

java.security.NoSuchAlgorithmException

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

update

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

Updates the checksum with the given buffer's contents

Parameters:

buffer - data to update

offset - start in buffer

length - number of bytes to use from buffer starting at offset

toString

public java.lang.String toString()

Outputs the current digest checksum in a format suitable for including in Atmos create/update calls.

Overrides:

toString in class java.lang.Object

setExpectedValue

public void setExpectedValue(java.lang.String expectedValue)

Sets the expected value for this checksum. Only used for read operations

Parameters:

expectedValue - the expectedValue to set

getExpectedValue

public java.lang.String getExpectedValue()

Gets the expected value for this checksum. Only used for read operations.

Returns:

the expectedValue