net.nicoulaj.maven.plugins.checksum.digest

Class MessageDigestFileDigester

java.lang.Object

net.nicoulaj.maven.plugins.checksum.digest.AbstractFileDigester

net.nicoulaj.maven.plugins.checksum.digest.MessageDigestFileDigester

All Implemented Interfaces:

FileDigester

public class MessageDigestFileDigester
extends AbstractFileDigester

An implementation of FileDigester that streams the content of files to a MessageDigest.

Since:

1.0

Author:

Julien Nicoulaud

Field Summary

Fields

Modifier and Type	Field and Description
protected MessageDigest	messageDigest The MessageDigest instance.

Fields inherited from class net.nicoulaj.maven.plugins.checksum.digest.AbstractFileDigester

algorithm

Fields inherited from interface net.nicoulaj.maven.plugins.checksum.digest.FileDigester

STREAMING_BUFFER_SIZE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MessageDigestFileDigester(String algorithm) Build a new instance of MessageDigestFileDigester.

Method Summary

Modifier and Type	Method and Description
String	calculate(File file) Calculate a checksum for a file.

Methods inherited from class net.nicoulaj.maven.plugins.checksum.digest.AbstractFileDigester

getAlgorithm, getFileExtension

Methods inherited from class java.lang.Object

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

Field Detail

messageDigest

protected final MessageDigest messageDigest

The MessageDigest instance.

Constructor Detail

MessageDigestFileDigester

protected MessageDigestFileDigester(String algorithm)
                             throws NoSuchAlgorithmException

Build a new instance of MessageDigestFileDigester.

Parameters:

algorithm - the algorithm used to compute checksum digests.

Throws:

NoSuchAlgorithmException - in case the given is not supported.

Method Detail

calculate

public String calculate(File file)
                 throws DigesterException

Calculate a checksum for a file.

Parameters:

file - the file to compute the checksum for.

Returns:

the current checksum.

Throws:

DigesterException - if there was a problem computing the hashcode.