org.parboiled.common

Class Base64

java.lang.Object

org.parboiled.common.Base64

public class Base64
extends Object

Constructor Summary

Constructors

Constructor and Description
Base64(String alphabet)

Method Summary

Methods

Modifier and Type	Method and Description
static Base64	custom()
byte[]	decode(byte[] sArr) Decodes a BASE64 encoded byte array.
byte[]	decode(char[] sArr) Decodes a BASE64 encoded char array.
byte[]	decode(String str) Decodes a BASE64 encoded String.
byte[]	decodeFast(byte[] sArr) Decodes a BASE64 encoded byte array that is known to be resonably well formatted.
byte[]	decodeFast(char[] sArr) Decodes a BASE64 encoded char array that is known to be resonably well formatted.
byte[]	decodeFast(String s) Decodes a BASE64 encoded string that is known to be resonably well formatted.
byte[]	encodeToByte(byte[] sArr, boolean lineSep) Encodes a raw byte array into a BASE64 byte[] representation i accordance with RFC 2045.
char[]	encodeToChar(byte[] sArr, boolean lineSep) Encodes a raw byte array into a BASE64 char[] representation i accordance with RFC 2045.
String	encodeToString(byte[] sArr, boolean lineSep) Encodes a raw byte array into a BASE64 String representation in accordance with RFC 2045.
char[]	getAlphabet()
static Base64	rfc2045()

Methods inherited from class java.lang.Object

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

Constructor Detail

Base64

public Base64(String alphabet)

Method Detail

custom

public static Base64 custom()

rfc2045

public static Base64 rfc2045()

decode

public final byte[] decode(char[] sArr)

Decodes a BASE64 encoded char array. All illegal characters will be ignored and can handle both arrays with and without line separators.

Parameters:

sArr - The source array. null or length 0 will return an empty array.

Returns:

The decoded array of bytes. May be of length 0. Will be null if the legal characters (including '=') isn't divideable by 4. (I.e. definitely corrupted).

decode

public final byte[] decode(byte[] sArr)

Decodes a BASE64 encoded byte array. All illegal characters will be ignored and can handle both arrays with and without line separators.

Parameters:

sArr - The source array. Length 0 will return an empty array. null will throw an exception.

Returns:

The decoded array of bytes. May be of length 0. Will be null if the legal characters (including '=') isn't divideable by 4. (I.e. definitely corrupted).

decode

public final byte[] decode(String str)

Decodes a BASE64 encoded String. All illegal characters will be ignored and can handle both strings with and without line separators.
Note! It can be up to about 2x the speed to call decode(str.toCharArray()) instead. That will create a temporary array though. This version will use str.charAt(i) to iterate the string.

Parameters:

str - The source string. null or length 0 will return an empty array.

Returns:

The decoded array of bytes. May be of length 0. Will be null if the legal characters (including '=') isn't divideable by 4. (I.e. definitely corrupted).

decodeFast

public final byte[] decodeFast(char[] sArr)

Decodes a BASE64 encoded char array that is known to be resonably well formatted. The method is about twice as fast as decode(char[]). The preconditions are:
+ The array must have a line length of 76 chars OR no line separators at all (one line).
+ Line separator must be "\r\n", as specified in RFC 2045 + The array must not contain illegal characters within the encoded string
+ The array CAN have illegal characters at the beginning and end, those will be dealt with appropriately.

Parameters:

sArr - The source array. Length 0 will return an empty array. null will throw an exception.

Returns:

The decoded array of bytes. May be of length 0.

decodeFast

public final byte[] decodeFast(byte[] sArr)

Decodes a BASE64 encoded byte array that is known to be resonably well formatted. The method is about twice as fast as decode(byte[]). The preconditions are:
+ The array must have a line length of 76 chars OR no line separators at all (one line).
+ Line separator must be "\r\n", as specified in RFC 2045 + The array must not contain illegal characters within the encoded string
+ The array CAN have illegal characters at the beginning and end, those will be dealt with appropriately.

Parameters:

sArr - The source array. Length 0 will return an empty array. null will throw an exception.

Returns:

The decoded array of bytes. May be of length 0.

decodeFast

public final byte[] decodeFast(String s)

Decodes a BASE64 encoded string that is known to be resonably well formatted. The method is about twice as fast as decode(String). The preconditions are:
+ The array must have a line length of 76 chars OR no line separators at all (one line).
+ Line separator must be "\r\n", as specified in RFC 2045 + The array must not contain illegal characters within the encoded string
+ The array CAN have illegal characters at the beginning and end, those will be dealt with appropriately.

Parameters:

s - The source string. Length 0 will return an empty array. null will throw an exception.

Returns:

The decoded array of bytes. May be of length 0.

encodeToByte

public final byte[] encodeToByte(byte[] sArr,
                  boolean lineSep)

Encodes a raw byte array into a BASE64 byte[] representation i accordance with RFC 2045.

Parameters:

sArr - The bytes to convert. If null or length 0 an empty array will be returned.

lineSep - Optional "\r\n" after 76 characters, unless end of file.
No line separator will be in breach of RFC 2045 which specifies max 76 per line but will be a little faster.

Returns:

A BASE64 encoded array. Never null.

encodeToString

public final String encodeToString(byte[] sArr,
                    boolean lineSep)

Encodes a raw byte array into a BASE64 String representation in accordance with RFC 2045.

Parameters:

sArr - The bytes to convert. If null or length 0 an empty array will be returned.

lineSep - Optional "\r\n" after 76 characters, unless end of file.
No line separator will be in breach of RFC 2045 which specifies max 76 per line but will be a little faster.

Returns:

A BASE64 encoded array. Never null.

encodeToChar

public final char[] encodeToChar(byte[] sArr,
                  boolean lineSep)

Encodes a raw byte array into a BASE64 char[] representation i accordance with RFC 2045.

Parameters:

sArr - The bytes to convert. If null or length 0 an empty array will be returned.

lineSep - Optional "\r\n" after 76 characters, unless end of file.
No line separator will be in breach of RFC 2045 which specifies max 76 per line but will be a little faster.

Returns:

A BASE64 encoded array. Never null.

getAlphabet

public char[] getAlphabet()