Package org.eclipse.aether.util

Class ChecksumUtils

  • public final class ChecksumUtils
extends java.lang.Object
    A utility class to assist in the verification and generation of checksums.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private ChecksumUtils()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static java.util.Map<java.lang.String,​java.lang.Object> calc​(byte[] dataBytes, java.util.Collection<java.lang.String> algos)  
      static java.util.Map<java.lang.String,​java.lang.Object> calc​(java.io.File dataFile, java.util.Collection<java.lang.String> algos)
      Calculates checksums for the specified file.
      private static java.util.Map<java.lang.String,​java.lang.Object> calc​(java.io.InputStream data, java.util.Collection<java.lang.String> algos)  
      static java.lang.String read​(java.io.File checksumFile)
      Extracts the checksum from the specified file.
      static java.lang.String toHexString​(byte[] bytes)
      Creates a hexadecimal representation of the specified bytes.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ChecksumUtils

        private ChecksumUtils()

    • Method Detail

      • read

        public static java.lang.String read​(java.io.File checksumFile)
                             throws java.io.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:
        java.io.IOException - If the checksum does not exist or could not be read for other reasons.

      • calc

        public static java.util.Map<java.lang.String,​java.lang.Object> calc​(java.io.File dataFile,
                                                                          java.util.Collection<java.lang.String> algos)
                                                                   throws java.io.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 occurred while trying to calculate it, never null.
        Throws:
        java.io.IOException - If the data file could not be read.

      • calc

        public static java.util.Map<java.lang.String,​java.lang.Object> calc​(byte[] dataBytes,
                                                                          java.util.Collection<java.lang.String> algos)
                                                                   throws java.io.IOException
        Throws:
        java.io.IOException

      • calc

        private static java.util.Map<java.lang.String,​java.lang.Object> calc​(java.io.InputStream data,
                                                                           java.util.Collection<java.lang.String> algos)
                                                                    throws java.io.IOException
        Throws:
        java.io.IOException

      • toHexString

        public static java.lang.String toHexString​(byte[] bytes)
        Creates a hexadecimal representation of the specified bytes. Each byte is converted into a two-digit hex number and appended to the result with no separator between consecutive bytes.
        Parameters:
        bytes - The bytes to represent in hex notation, may be be null.
        Returns:
        The hexadecimal representation of the input or null if the input was null.