org.opensaml.artifact
Class Util

java.lang.Object
  org.opensaml.artifact.Util

public final class Util
extends Object

An artifact utility class.

Author:

Tom Scavo

Method Summary

static byte[]	concat(byte[] left_bytes, byte[] right_bytes) Concatenate two byte arrays.
static byte[]	generateSourceId(MessageDigest md, String s) Generate a sourceId from the given string using the given MessageDigest object.
static byte[]	generateSourceId(String s) Generate a sourceId from the given string.
static byte[]	generateSourceId(URI providerId) A convenience method to generate a sourceId from the given providerId.

Methods inherited from class java.lang.Object

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

Method Detail

generateSourceId

public static byte[] generateSourceId(MessageDigest md,
                                      String s)

Generate a sourceId from the given string using the given MessageDigest object.

Parameters:

md - a MessageDigest object

s - an arbitrary string

Returns:

the SHA-1 hash of the string or null if either argument is null

See Also:

MessageDigest

generateSourceId

public static byte[] generateSourceId(String s)
                               throws NoSuchAlgorithmException

Generate a sourceId from the given string. Instantiate a local MessageDigest object as needed.

Parameters:

s - an arbitrary string

Returns:

the SHA-1 hash of the string

Throws:

NoSuchAlgorithmException - if the Java implementation does not support the "SHA-1" hash algorithm.

See Also:

MessageDigest

generateSourceId

public static byte[] generateSourceId(URI providerId)
                               throws NoSuchAlgorithmException

A convenience method to generate a sourceId from the given providerId. The URI is simply converted to a string before it is hashed.

Parameters:

providerId - the providerId of the artifact issuer

Returns:

the SHA-1 hash of the providerId or null if the argument is null

Throws:

NoSuchAlgorithmException - if the Java implementation does not support the "SHA-1" hash algorithm.

See Also:

MessageDigest

concat

public static byte[] concat(byte[] left_bytes,
                            byte[] right_bytes)

Concatenate two byte arrays.

Parameters:

left_bytes - An array of bytes.

right_bytes - Another array of bytes.

Returns:

Yet another byte array, the concatenation of the given byte arrays.