java.lang.Object
- org.apache.commons.codec.net.BCodec

All Implemented Interfaces:

Decoder, Encoder, StringDecoder, StringEncoder
```
public class BCodec
extends Object
implements StringEncoder, StringDecoder
```
Identical to the Base64 encoding defined by RFC 1521 and allows a character set to be specified.
RFC 1522 describes techniques to allow the encoding of non-ASCII text in various portions of a RFC 822 [2] message header, in a manner which is unlikely to confuse existing message handling software.

This class is immutable and thread-safe.

Since:

1.3

See Also:

MIME (Multipurpose Internet Mail Extensions) Part Two: Message Header Extensions for Non-ASCII Text

Field Summary

Fields
Modifier and Type Field Description

protected static String POSTFIX
Prefix.

protected static String PREFIX
Postfix.

protected static char SEP
Separator.

Constructor Summary

Constructors
Constructor	Description
`BCodec()`	Default constructor.
`BCodec(String charsetName)`	Constructor which allows for the selection of a default Charset
`BCodec(Charset charset)`	Constructor which allows for the selection of a default Charset
`BCodec(Charset charset, CodecPolicy decodingPolicy)`	Constructor which allows for the selection of a default Charset.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`decode(Object value)`	Decodes a Base64 object into its original form.
`String`	`decode(String value)`	Decodes a Base64 string into its original form.
`protected String`	`decodeText(String text)`	Applies an RFC 1522 compliant decoding scheme to the given string of text.
`protected byte[]`	`doDecoding(byte[] bytes)`	Decodes an array of bytes using the defined encoding scheme.
`protected byte[]`	`doEncoding(byte[] bytes)`	Encodes an array of bytes using the defined encoding scheme.
`Object`	`encode(Object value)`	Encodes an object into its Base64 form using the default Charset.
`String`	`encode(String strSource)`	Encodes a string into its Base64 form using the default Charset.
`String`	`encode(String strSource, String sourceCharset)`	Encodes a string into its Base64 form using the specified Charset.
`String`	`encode(String strSource, Charset sourceCharset)`	Encodes a string into its Base64 form using the specified Charset.
`protected String`	`encodeText(String text, String charsetName)`	Applies an RFC 1522 compliant encoding scheme to the given string of text with the given charset.
`protected String`	`encodeText(String text, Charset charset)`	Applies an RFC 1522 compliant encoding scheme to the given string of text with the given charset.
`Charset`	`getCharset()`	Gets the default Charset name used for string decoding and encoding.
`String`	`getDefaultCharset()`	Gets the default Charset name used for string decoding and encoding.
`protected String`	`getEncoding()`	Returns the codec name (referred to as encoding in the RFC 1522).
`boolean`	`isStrictDecoding()`	Returns true if decoding behavior is strict.

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

- Field Detail
  - SEP
```
protected static final char SEP
```
    Separator.
    
    See Also:
    
    Constant Field Values
  - POSTFIX
```
protected static final String POSTFIX
```
    Prefix.
    
    See Also:
    
    Constant Field Values
  - PREFIX
```
protected static final String PREFIX
```
    Postfix.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - BCodec
```
public BCodec()
```
    Default constructor.
  - BCodec
```
public BCodec(Charset charset)
```
    Constructor which allows for the selection of a default Charset
    
    Parameters:
    
    charset - the default string Charset to use.
    
    Since:
    
    1.7
    
    See Also:
    
    Standard charsets
  - BCodec
```
public BCodec(Charset charset,
              CodecPolicy decodingPolicy)
```
    Constructor which allows for the selection of a default Charset.
    
    Parameters:
    
    charset - the default string Charset to use.
    
    decodingPolicy - The decoding policy.
    
    Since:
    
    1.15
    
    See Also:
    
    Standard charsets
  - BCodec
```
public BCodec(String charsetName)
```
    Constructor which allows for the selection of a default Charset
    
    Parameters:
    
    charsetName - the default Charset to use.
    
    Throws:
    
    UnsupportedCharsetException - If the named Charset is unavailable
    
    Since:
    
    1.7 throws UnsupportedCharsetException if the named Charset is unavailable
    
    See Also:
    
    Standard charsets
- Method Detail
  - isStrictDecoding
```
public boolean isStrictDecoding()
```
    Returns true if decoding behavior is strict. Decoding will raise a DecoderException if trailing bits are not part of a valid Base64 encoding.
    The default is false for lenient encoding. Decoding will compose trailing bits into 8-bit bytes and discard the remainder.
    
    Returns:
    
    true if using strict decoding
    
    Since:
    
    1.15
  - getEncoding
```
protected String getEncoding()
```
    Returns the codec name (referred to as encoding in the RFC 1522).
    
    Returns:
    
    name of the codec
  - doEncoding
```
protected byte[] doEncoding(byte[] bytes)
```
    Encodes an array of bytes using the defined encoding scheme.
    
    Parameters:
    
    bytes - Data to be encoded
    
    Returns:
    
    A byte array containing the encoded data
  - doDecoding
```
protected byte[] doDecoding(byte[] bytes)
```
    Decodes an array of bytes using the defined encoding scheme.
    
    Parameters:
    
    bytes - Data to be decoded
    
    Returns:
    
    a byte array that contains decoded data
  - encode
```
public String encode(String strSource,
                     Charset sourceCharset)
              throws EncoderException
```
    Encodes a string into its Base64 form using the specified Charset. Unsafe characters are escaped.
    
    Parameters:
    
    strSource - string to convert to Base64 form
    
    sourceCharset - the Charset for value
    
    Returns:
    
    Base64 string
    
    Throws:
    
    EncoderException - thrown if a failure condition is encountered during the encoding process.
    
    Since:
    
    1.7
  - encode
```
public String encode(String strSource,
                     String sourceCharset)
              throws EncoderException
```
    Encodes a string into its Base64 form using the specified Charset. Unsafe characters are escaped.
    
    Parameters:
    
    strSource - string to convert to Base64 form
    
    sourceCharset - the Charset for value
    
    Returns:
    
    Base64 string
    
    Throws:
    
    EncoderException - thrown if a failure condition is encountered during the encoding process.
  - encode
```
public String encode(String strSource)
              throws EncoderException
```
    Encodes a string into its Base64 form using the default Charset. Unsafe characters are escaped.
    
    Specified by:
    
    encode in interface StringEncoder
    
    Parameters:
    
    strSource - string to convert to Base64 form
    
    Returns:
    
    Base64 string
    
    Throws:
    
    EncoderException - thrown if a failure condition is encountered during the encoding process.
  - decode
```
public String decode(String value)
              throws DecoderException
```
    Decodes a Base64 string into its original form. Escaped characters are converted back to their original representation.
    
    Specified by:
    
    decode in interface StringDecoder
    
    Parameters:
    
    value - Base64 string to convert into its original form
    
    Returns:
    
    original string
    
    Throws:
    
    DecoderException - A decoder exception is thrown if a failure condition is encountered during the decode process.
  - encode
```
public Object encode(Object value)
              throws EncoderException
```
    Encodes an object into its Base64 form using the default Charset. Unsafe characters are escaped.
    
    Specified by:
    
    encode in interface Encoder
    
    Parameters:
    
    value - object to convert to Base64 form
    
    Returns:
    
    Base64 object
    
    Throws:
    
    EncoderException - thrown if a failure condition is encountered during the encoding process.
  - decode
```
public Object decode(Object value)
              throws DecoderException
```
    Decodes a Base64 object into its original form. Escaped characters are converted back to their original representation.
    
    Specified by:
    
    decode in interface Decoder
    
    Parameters:
    
    value - Base64 object to convert into its original form
    
    Returns:
    
    original object
    
    Throws:
    
    DecoderException - Thrown if the argument is not a String. Thrown if a failure condition is encountered during the decode process.
  - getCharset
```
public Charset getCharset()
```
    Gets the default Charset name used for string decoding and encoding.
    
    Returns:
    
    the default Charset name
    
    Since:
    
    1.7
  - getDefaultCharset
```
public String getDefaultCharset()
```
    Gets the default Charset name used for string decoding and encoding.
    
    Returns:
    
    the default Charset name
  - encodeText
```
protected String encodeText(String text,
                            Charset charset)
                     throws EncoderException
```
    Applies an RFC 1522 compliant encoding scheme to the given string of text with the given charset.
    This method constructs the "encoded-word" header common to all the RFC 1522 codecs and then invokes doEncoding(byte []) method of a concrete class to perform the specific encoding.
    
    Parameters:
    
    text - a string to encode
    
    charset - a charset to be used
    
    Returns:
    
    RFC 1522 compliant "encoded-word"
    
    Throws:
    
    EncoderException - thrown if there is an error condition during the Encoding process.
    
    See Also:
    
    Standard charsets
  - encodeText
```
protected String encodeText(String text,
                            String charsetName)
                     throws EncoderException,
                            UnsupportedEncodingException
```
    Applies an RFC 1522 compliant encoding scheme to the given string of text with the given charset.
    This method constructs the "encoded-word" header common to all the RFC 1522 codecs and then invokes doEncoding(byte []) method of a concrete class to perform the specific encoding.
    
    Parameters:
    
    text - a string to encode
    
    charsetName - the charset to use
    
    Returns:
    
    RFC 1522 compliant "encoded-word"
    
    Throws:
    
    EncoderException - thrown if there is an error condition during the Encoding process.
    
    UnsupportedEncodingException - if charset is not available
    
    See Also:
    
    Standard charsets
  - decodeText
```
protected String decodeText(String text)
                     throws DecoderException,
                            UnsupportedEncodingException
```
    Applies an RFC 1522 compliant decoding scheme to the given string of text.
    This method processes the "encoded-word" header common to all the RFC 1522 codecs and then invokes doEncoding(byte []) method of a concrete class to perform the specific decoding.
    
    Parameters:
    
    text - a string to decode
    
    Returns:
    
    A new decoded String or null if the input is null.
    
    Throws:
    
    DecoderException - thrown if there is an error condition during the decoding process.
    
    UnsupportedEncodingException - thrown if charset specified in the "encoded-word" header is not supported

Modifier and Type	Field	Description
`protected static String`	`POSTFIX`	Prefix.
`protected static String`	`PREFIX`	Postfix.
`protected static char`	`SEP`	Separator.

Class BCodec

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SEP

POSTFIX

PREFIX

Constructor Detail

BCodec

BCodec

BCodec

BCodec

Method Detail

isStrictDecoding

getEncoding

doEncoding

doDecoding

encode

encode

encode

decode

encode

decode

getCharset

getDefaultCharset

encodeText

encodeText

decodeText