com.x5.util

Class Base64

java.lang.Object

com.x5.util.Base64

public class Base64
extends java.lang.Object

Encodes and decodes to and from Base64 notation.

Change Log:

• v1.3.6 - Fixed OutputStream.flush() so that 'position' is reset.
• v1.3.5 - Added flag to turn on and off line breaks. Fixed bug in input stream where last buffer being read, if not completely full, was not returned.
• v1.3.4 - Fixed when "improperly padded stream" error was thrown at the wrong time.
• v1.3.3 - Fixed I/O streams which were totally messed up.

I am placing this code in the Public Domain. Do with it as you will. This software comes with no guarantees or warranties but with plenty of well-wishing instead! Please visit http://iharder.net/xmlizable periodically to check for updates or to contribute improvements.

Version:

1.3.4

Author:

Robert Harder, rob@iharder.net

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Base64.InputStream A Base64.InputStream will read data from another InputStream, given in the constructor, and encode/decode to/from Base64 notation on the fly.
static class	Base64.OutputStream A Base64.OutputStream will write data to another OutputStream, given in the constructor, and encode/decode to/from Base64 notation on the fly.

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	DECODE Specify decoding (value is false).
static boolean	ENCODE Specify encoding (value is true).

Method Summary

Modifier and Type	Method and Description
static byte[]	decode(byte[] source, int off, int len) Decodes Base64 content in byte array format and returns the decoded byte array.
static byte[]	decode(java.lang.String s) Decodes data from Base64 notation.
static java.lang.Object	decodeToObject(java.lang.String encodedObject) Attempts to decode Base64 data and deserialize a Java Object within.
static java.lang.String	decodeToString(java.lang.String s) Decodes data from Base64 notation and returns it as a string.
static java.lang.String	encodeBytes(byte[] source) Encodes a byte array into Base64 notation.
static java.lang.String	encodeBytes(byte[] source, boolean breakLines) Encodes a byte array into Base64 notation.
static java.lang.String	encodeBytes(byte[] source, int off, int len) Encodes a byte array into Base64 notation.
static java.lang.String	encodeBytes(byte[] source, int off, int len, boolean breakLines) Encodes a byte array into Base64 notation.
static java.lang.String	encodeObject(java.io.Serializable serializableObject) Serializes an object and returns the Base64-encoded version of that serialized object.
static java.lang.String	encodeObject(java.io.Serializable serializableObject, boolean breakLines) Serializes an object and returns the Base64-encoded version of that serialized object.
static java.lang.String	encodeString(java.lang.String s) Encodes a string in Base64 notation with line breaks after every 75 Base64 characters.
static java.lang.String	encodeString(java.lang.String s, boolean breakLines) Encodes a string in Base64 notation with line breaks after every 75 Base64 characters.

Methods inherited from class java.lang.Object

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

Field Detail

ENCODE

public static final boolean ENCODE

Specify encoding (value is true).

See Also:

Constant Field Values

DECODE

public static final boolean DECODE

Specify decoding (value is false).

See Also:

Constant Field Values

Method Detail

encodeObject

public static java.lang.String encodeObject(java.io.Serializable serializableObject)

Serializes an object and returns the Base64-encoded version of that serialized object. If the object cannot be serialized or there is another error, the method will return null.

Parameters:

serializableObject - The object to encode

Returns:

The Base64-encoded object

Since:

1.4

encodeObject

public static java.lang.String encodeObject(java.io.Serializable serializableObject,
                                            boolean breakLines)

Serializes an object and returns the Base64-encoded version of that serialized object. If the object cannot be serialized or there is another error, the method will return null.

Parameters:

serializableObject - The object to encode

breakLines - Break lines at 80 characters or less.

Returns:

The Base64-encoded object

Since:

1.4

encodeBytes

public static java.lang.String encodeBytes(byte[] source)

Encodes a byte array into Base64 notation. Equivalen to calling encodeBytes( source, 0, source.length )

Parameters:

source - The data to convert

Since:

1.4

encodeBytes

public static java.lang.String encodeBytes(byte[] source,
                                           boolean breakLines)

Encodes a byte array into Base64 notation. Equivalen to calling encodeBytes( source, 0, source.length )

Parameters:

source - The data to convert

breakLines - Break lines at 80 characters or less.

Since:

1.4

encodeBytes

public static java.lang.String encodeBytes(byte[] source,
                                           int off,
                                           int len)

Encodes a byte array into Base64 notation.

Parameters:

source - The data to convert

off - Offset in array where conversion should begin

len - Length of data to convert

Since:

1.4

encodeBytes

public static java.lang.String encodeBytes(byte[] source,
                                           int off,
                                           int len,
                                           boolean breakLines)

Encodes a byte array into Base64 notation.

Parameters:

source - The data to convert

off - Offset in array where conversion should begin

len - Length of data to convert

breakLines - Break lines at 80 characters or less.

Since:

1.4

encodeString

public static java.lang.String encodeString(java.lang.String s)

Encodes a string in Base64 notation with line breaks after every 75 Base64 characters.

Parameters:

s - the string to encode

Returns:

the encoded string

Since:

1.3

encodeString

public static java.lang.String encodeString(java.lang.String s,
                                            boolean breakLines)

Encodes a string in Base64 notation with line breaks after every 75 Base64 characters.

Parameters:

s - the string to encode

breakLines - Break lines at 80 characters or less.

Returns:

the encoded string

Since:

1.3

decode

public static byte[] decode(java.lang.String s)

Decodes data from Base64 notation.

Parameters:

s - the string to decode

Returns:

the decoded data

Since:

1.4

decodeToString

public static java.lang.String decodeToString(java.lang.String s)

Decodes data from Base64 notation and returns it as a string. Equivlaent to calling new String( decode( s ) )

Parameters:

s - the strind to decode

Returns:

The data as a string

Since:

1.4

decodeToObject

public static java.lang.Object decodeToObject(java.lang.String encodedObject)

Attempts to decode Base64 data and deserialize a Java Object within. Returns null if there was an error.

Parameters:

encodedObject - The Base64 data to decode

Returns:

The decoded and deserialized object

Since:

1.4

decode

public static byte[] decode(byte[] source,
                            int off,
                            int len)

Decodes Base64 content in byte array format and returns the decoded byte array.

Parameters:

source - The Base64 encoded data

off - The offset of where to begin decoding

len - The length of characters to decode

Returns:

decoded data

Since:

1.3