org.apache.archiva.checksum
Class ChecksummedFile

java.lang.Object
  org.apache.archiva.checksum.ChecksummedFile

public class ChecksummedFile
extends Object

ChecksummedFile

Terminology:

Checksum File

The file that contains the previously calculated checksum value for the reference file. This is a text file with the extension ".sha1" or ".md5", and contains a single entry consisting of an optional reference filename, and a checksum string.

Reference File

The file that is being referenced in the checksum file.

Constructor Summary

ChecksummedFile(File referenceFile)
Construct a ChecksummedFile object.

Method Summary

String	calculateChecksum(ChecksumAlgorithm checksumAlgorithm) Calculate the checksum based on a given checksum.
File	createChecksum(ChecksumAlgorithm checksumAlgorithm) Creates a checksum file of the provided referenceFile.
boolean	fixChecksums(ChecksumAlgorithm[] algorithms) Fix or create checksum files for the reference file.
File	getChecksumFile(ChecksumAlgorithm checksumAlgorithm) Get the checksum file for the reference file and hash.
boolean	isValidChecksum(ChecksumAlgorithm algorithm) Given a checksum file, check to see if the file it represents is valid according to the checksum.
boolean	isValidChecksums(ChecksumAlgorithm[] algorithms) Of any checksum files present, validate that the reference file conforms the to the checksum.
String	parseChecksum(String rawChecksumString, ChecksumAlgorithm expectedHash, String expectedPath) Parse a checksum string.

Methods inherited from class java.lang.Object

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

Constructor Detail

ChecksummedFile

public ChecksummedFile(File referenceFile)

Construct a ChecksummedFile object.

Parameters:

referenceFile -

Method Detail

calculateChecksum

public String calculateChecksum(ChecksumAlgorithm checksumAlgorithm)
                         throws IOException

Calculate the checksum based on a given checksum.

Parameters:

checksumAlgorithm - the algorithm to use.

Returns:

the checksum string for the file.

Throws:

IOException - if unable to calculate the checksum.

createChecksum

public File createChecksum(ChecksumAlgorithm checksumAlgorithm)
                    throws IOException

Creates a checksum file of the provided referenceFile.

Parameters:

checksumAlgorithm - the hash to use.

Returns:

the checksum File that was created.

Throws:

IOException - if there was a problem either reading the referenceFile, or writing the checksum file.

getChecksumFile

public File getChecksumFile(ChecksumAlgorithm checksumAlgorithm)

Get the checksum file for the reference file and hash.

Parameters:

checksumAlgorithm - the hash that we are interested in.

Returns:

the checksum file to return

isValidChecksum

public boolean isValidChecksum(ChecksumAlgorithm algorithm)
                        throws IOException

Given a checksum file, check to see if the file it represents is valid according to the checksum.

NOTE: Only supports single file checksums of type MD5 or SHA1.

Parameters:

checksumFile - the algorithms to check for.

Returns:

true if the checksum is valid for the file it represents. or if the checksum file does not exist.

Throws:

IOException - if the reading of the checksumFile or the file it refers to fails.

isValidChecksums

public boolean isValidChecksums(ChecksumAlgorithm[] algorithms)

Of any checksum files present, validate that the reference file conforms the to the checksum.

Parameters:

algorithms - the algorithms to check for.

Returns:

true if the checksums report that the the reference file is valid, false if invalid.

fixChecksums

public boolean fixChecksums(ChecksumAlgorithm[] algorithms)

Fix or create checksum files for the reference file.

Parameters:

algorithms - the hashes to check for.

Returns:

true if checksums were created successfully.

parseChecksum

public String parseChecksum(String rawChecksumString,
                            ChecksumAlgorithm expectedHash,
                            String expectedPath)
                     throws IOException

Parse a checksum string.

Validate the expected path, and expected checksum algorithm, then return the trimmed checksum hex string.

Parameters:

rawChecksumString -

expectedHash -

expectedPath -

Returns:

Throws:

IOException