org.sonatype.aether.util
Class ChecksumUtils

java.lang.Object
  org.sonatype.aether.util.ChecksumUtils

public class ChecksumUtils
extends Object

A utility class to assist in the verification and generation of checksums.

Author:

Benjamin Bentmann

Method Summary

static Map<String,Object>	calc(File dataFile, Collection<String> algos) Calculates checksums for the specified file.
static String	read(File checksumFile) Extracts the checksum from the specified file.

Methods inherited from class java.lang.Object

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

Method Detail

read

public static String read(File checksumFile)
                   throws IOException

Extracts the checksum from the specified file.

Parameters:

checksumFile - The path to the checksum file, must not be null.

Returns:

The checksum stored in the file, never null.

Throws:

IOException - If the checksum does not exist or could not be read for other reasons.

calc

public static Map<String,Object> calc(File dataFile,
                                      Collection<String> algos)
                               throws IOException

Calculates checksums for the specified file.

Parameters:

dataFile - The file for which to calculate checksums, must not be null.

algos - The names of checksum algorithms (cf. MessageDigest.getInstance(String) to use, must not be null.

Returns:

The calculated checksums, indexed by algorithm name, or the exception that occured while trying to calculate it, never null.

Throws:

IOException - If the data file could not be read.