Package org.eclipse.aether.util
Class ChecksumUtils
- java.lang.Object
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- org.eclipse.aether.util.ChecksumUtils
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public final class ChecksumUtils extends java.lang.Object
A utility class to assist in the verification and generation of checksums.
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Constructor Summary
Constructors Modifier Constructor Description private
ChecksumUtils()
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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.
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Method Detail
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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 benull
.- 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.
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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 benull
.algos
- The names of checksum algorithms (cf.MessageDigest.getInstance(String)
to use, must not benull
.- 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.
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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
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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
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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 benull
.- Returns:
- The hexadecimal representation of the input or
null
if the input wasnull
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