Package edu.wisc.library.ocfl.api.model

Class DigestAlgorithm

java.lang.Object

edu.wisc.library.ocfl.api.model.DigestAlgorithm

public class DigestAlgorithm
extends Object

Maps OCFL defined digest algorithms to their Java names. Java does not include built-in implementations for all of the algorithms, using a 3rd party provider, such as BouncyCastle, is necessary for some, such as blake2b. New algorithms should be registered in the DigestAlgorithmRegistry.

Field Summary

Fields

Modifier and Type	Field	Description
static DigestAlgorithm	blake2b160
static DigestAlgorithm	blake2b256
static DigestAlgorithm	blake2b384
static DigestAlgorithm	blake2b512
static DigestAlgorithm	md5
static DigestAlgorithm	sha1
static DigestAlgorithm	sha256
static DigestAlgorithm	sha512
static DigestAlgorithm	sha512_256

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
static DigestAlgorithm	fromOcflName(String ocflName)	Creates a DigestAlgorithm for the given OCFL name.
static DigestAlgorithm	fromOcflName(String ocflName, String javaStandardName)	Creates a DigestAlgorithm for the given OCFL name.
String	getJavaStandardName()	The Java name for the digest algorithm.
MessageDigest	getMessageDigest()	Returns a new MessageDigest
String	getOcflName()	The OCFL name for the digest algorithm.
int	hashCode()
boolean	hasJavaStandardName()	Indicates whether or not there is a Java mapping for the algorithm.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

md5

public static final DigestAlgorithm md5

sha1

public static final DigestAlgorithm sha1

sha256

public static final DigestAlgorithm sha256

sha512

public static final DigestAlgorithm sha512

blake2b512

public static final DigestAlgorithm blake2b512

blake2b160

public static final DigestAlgorithm blake2b160

blake2b256

public static final DigestAlgorithm blake2b256

blake2b384

public static final DigestAlgorithm blake2b384

sha512_256

public static final DigestAlgorithm sha512_256

Method Detail

fromOcflName

public static DigestAlgorithm fromOcflName(String ocflName)

Creates a DigestAlgorithm for the given OCFL name. If the name is not mapped in the DigestAlgorithmRegistry then a new object is created, but not automatically added to the registry. Newly created DigestAlgorithms are not automatically mapped to Java names.

Parameters:

ocflName - ocfl name of algorithm

Returns:

digest algorithm

fromOcflName

public static DigestAlgorithm fromOcflName(String ocflName,
                                           String javaStandardName)

Creates a DigestAlgorithm for the given OCFL name. If the name is not mapped in the DigestAlgorithmRegistry then a new object is created, but not automatically added to the registry.

Parameters:

ocflName - ocfl name of algorithm

javaStandardName - the name of the algorithm in Java

Returns:

digest algorithm

getOcflName

public String getOcflName()

The OCFL name for the digest algorithm.

Returns:

standardized ocfl name for the digest algorithm

getJavaStandardName

public String getJavaStandardName()

The Java name for the digest algorithm.

Returns:

name of the digest algorithm in Java or null

hasJavaStandardName

public boolean hasJavaStandardName()

Indicates whether or not there is a Java mapping for the algorithm.

Returns:

whether or not the digest algorithm has a Java name

getMessageDigest

public MessageDigest getMessageDigest()

Returns a new MessageDigest

Returns:

MessageDigest

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object