ContentDigest (Fedora Repository Kernel API 6.0.0-alpha-1 API)

java.lang.Object
- org.fcrepo.kernel.api.utils.ContentDigest

```
public final class ContentDigest
extends Object
```
Digest helpers to convert digests (checksums) into URI strings (based loosely on Magnet URIs)

Since:

Mar 6, 2013

Author:

Chris Beer

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class ContentDigest.DIGEST_ALGORITHM

Field Summary

Fields
Modifier and Type Field Description

static String DEFAULT_ALGORITHM

static ContentDigest.DIGEST_ALGORITHM DEFAULT_DIGEST_ALGORITHM

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static URI`	`asURI(String algorithm, byte[] data)`	Convert a MessageDigest algorithm and checksum byte-array data to a URN
`static URI`	`asURI(String algorithm, String value)`	Convert a MessageDigest algorithm and checksum value to a URN
`static String`	`getAlgorithm(URI digestUri)`	Given a digest URI, get the corresponding MessageDigest algorithm
`static URI`	`missingChecksum()`	Placeholder checksum value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_DIGEST_ALGORITHM
```
public static final ContentDigest.DIGEST_ALGORITHM DEFAULT_DIGEST_ALGORITHM
```
  - DEFAULT_ALGORITHM
```
public static final String DEFAULT_ALGORITHM
```
- Method Detail
  - asURI
```
public static URI asURI(String algorithm,
                        String value)
```
    Convert a MessageDigest algorithm and checksum value to a URN
    
    Parameters:
    
    algorithm - the message digest algorithm
    
    value - the checksum value
    
    Returns:
    
    URI
  - asURI
```
public static URI asURI(String algorithm,
                        byte[] data)
```
    Convert a MessageDigest algorithm and checksum byte-array data to a URN
    
    Parameters:
    
    algorithm - the message digest algorithm
    
    data - the checksum byte-array data
    
    Returns:
    
    URI
  - getAlgorithm
```
public static String getAlgorithm(URI digestUri)
```
    Given a digest URI, get the corresponding MessageDigest algorithm
    
    Parameters:
    
    digestUri - the digest uri
    
    Returns:
    
    MessageDigest algorithm
  - missingChecksum
```
public static URI missingChecksum()
```
    Placeholder checksum value.
    
    Returns:
    
    URI