Package org.eclipse.aether.util

Class StringDigestUtil

java.lang.Object

org.eclipse.aether.util.StringDigestUtil

public final class StringDigestUtil
extends Object

A simple digester utility for Strings. Uses MessageDigest for requested algorithm. Supports one-pass or several rounds of updates, and as result emits hex encoded String.

Since:

1.9.0

Constructor Summary

Constructors

Constructor	Description
StringDigestUtil(String alg)	Constructs instance with given algorithm.

Method Summary

Modifier and Type	Method	Description
String	digest()	Returns the digest of all strings passed via update(String) as hex string.
static byte[]	fromHexString(String hexString)	Creates a byte array out of hexadecimal representation of the specified bytes.
static StringDigestUtil	sha1()	Helper method to create StringDigestUtil using SHA-1 digest algorithm.
static String	sha1(String string)	Helper method to calculate SHA-1 digest and hex encode it.
static String	toHexString(byte[] bytes)	Creates a hexadecimal representation of the specified bytes.
StringDigestUtil	update(String data)	Updates instance with passed in string.

Methods inherited from class java.lang.Object

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

Constructor Details

StringDigestUtil

public StringDigestUtil(String alg)

Constructs instance with given algorithm.

See Also:

• sha1()
• sha1(String)

Method Details

update

public StringDigestUtil update(String data)

Updates instance with passed in string.

digest

public String digest()

Returns the digest of all strings passed via update(String) as hex string. There is no state preserved and due implementation of MessageDigest.digest(), same applies here: this instance "resets" itself. Hence, the digest hex encoded string is returned only once.

See Also:

• MessageDigest.digest()

sha1

public static StringDigestUtil sha1()

Helper method to create StringDigestUtil using SHA-1 digest algorithm.

sha1

public static String sha1(String string)

Helper method to calculate SHA-1 digest and hex encode it.

toHexString

public static 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 null

Returns:

the hexadecimal representation of the input or null if the input was null

Since:

2.0.0

fromHexString

public static byte[] fromHexString(String hexString)

Creates a byte array out of hexadecimal representation of the specified bytes. If input string is null, null is returned. Input value must have even length (due hex encoding = 2 chars one byte).

Parameters:

hexString - the hexString to convert to byte array, may be null

Returns:

the byte array of the input or null if the input was null

Since:

2.0.0