Package org.codehaus.plexus.digest

Class AbstractStreamingDigester

java.lang.Object

org.codehaus.plexus.digest.AbstractStreamingDigester

All Implemented Interfaces:

StreamingDigester

Direct Known Subclasses:

StreamingMd5Digester, StreamingSha1Digester, StreamingSha256Digester

public abstract class AbstractStreamingDigester
extends Object
implements StreamingDigester

Gradually create a digest for a stream.

Author:

Brett Porter

Field Summary

Fields

Modifier and Type	Field	Description
protected final MessageDigest	md

Fields inherited from interface org.codehaus.plexus.digest.StreamingDigester

ROLE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractStreamingDigester(String algorithm)	Constructor for AbstractStreamingDigester.

Method Summary

Modifier and Type	Method	Description
String	calc()	calc.
protected static String	calc(MessageDigest md)	calc.
String	getAlgorithm()	getAlgorithm.
void	reset()	reset.
void	update(InputStream is)	Update the checksum with the content of the input stream.
protected static void	update(InputStream is, MessageDigest digest)	update.

Methods inherited from class java.lang.Object

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

Field Details

md

protected final MessageDigest md

Constructor Details

AbstractStreamingDigester

protected AbstractStreamingDigester(String algorithm)

Constructor for AbstractStreamingDigester.

Parameters:

algorithm - a String object.

Method Details

getAlgorithm

public String getAlgorithm()

getAlgorithm.

Specified by:

getAlgorithm in interface StreamingDigester

Returns:

a String object.

calc

public String calc()
            throws DigesterException

calc.

Specified by:

calc in interface StreamingDigester

Returns:

a String object.

Throws:

DigesterException - if any.

reset

public void reset()
           throws DigesterException

reset.

Specified by:

reset in interface StreamingDigester

Throws:

DigesterException - if any.

update

public void update(InputStream is)
            throws DigesterException

Update the checksum with the content of the input stream.

Specified by:

update in interface StreamingDigester

Parameters:

is - the input stream

Throws:

DigesterException - if there was a problem computing the hashcode.

calc

protected static String calc(MessageDigest md)

calc.

Parameters:

md - a MessageDigest object.

Returns:

a String object.

update

protected static void update(InputStream is,
 MessageDigest digest)
                      throws DigesterException

update.

Parameters:

is - a InputStream object.

digest - a MessageDigest object.

Throws:

DigesterException - if any.