public final class ChecksumUtils
extends java.lang.Object
Modifier | Constructor and Description |
---|---|
private |
ChecksumUtils() |
Modifier and Type | Method and 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.
|
public static java.lang.String read(java.io.File checksumFile) throws java.io.IOException
checksumFile
- The path to the checksum file, must not be null
.null
.java.io.IOException
- If the checksum does not exist or could not be read for other reasons.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
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
.null
.java.io.IOException
- If the data file could not be read.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
java.io.IOException
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
java.io.IOException
public static java.lang.String toHexString(byte[] bytes)
bytes
- The bytes to represent in hex notation, may be be null
.null
if the input was null
.