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Class cryptix.util.mime.TransferEncoding
java.lang.Object
|
+----cryptix.util.mime.TransferEncoding
- public abstract class TransferEncoding
- extends Object
This abstract class provides an API for encoding and decoding data according
to a MIME Content-Transfer-Encoding.
Note: The input to the encoding is always a sequence of bytes.
Strictly speaking the output is a sequence of characters, but since for
all MIME transfer encodings, these characters are from a subset of both
the Unicode and ASCII character repertoires, it is possible to represent
the output either as a String or as a byte array.
References:
- RFC 2045, Multipurpose Internet Mail Extensions (MIME) Part One,
Format of Internet Message Bodies,
http://www.imc.org/rfc2045
Copyright © 1995-1997
Systemics Ltd on behalf of the
Cryptix Development Team.
All rights reserved.
$Revision: 1.1.1.1 $
- Author:
- Jill Baker, David Hopwood
-
TransferEncoding()
-
-
decode(byte[])
- Decodes a byte array containing encoded ASCII.
-
decode(String)
- Decodes a encoded String.
-
encode(byte[])
- Encodes data as a String using this Content-Transfer-Encoding.
-
encodeAsByteArray(byte[])
- Encodes data as a byte array using this Content-Transfer-Encoding.
TransferEncoding
public TransferEncoding()
encode
public abstract String encode(byte data[])
- Encodes data as a String using this Content-Transfer-Encoding.
Line breaks in the output are represented as CR LF.
- Returns:
- the encoded string.
encodeAsByteArray
public byte[] encodeAsByteArray(byte data[])
- Encodes data as a byte array using this Content-Transfer-Encoding.
Each character of the output is mapped to its ASCII code point. Line
breaks in the output are represented as CR LF (codes 13 and 10).
- Returns:
- the encoded byte array.
decode
public byte[] decode(byte data[]) throws MIMEFormatException
- Decodes a byte array containing encoded ASCII. Characters with
ASCII code points <= 32 (this includes whitespace and newlines) are
ignored.
- Returns:
- the decoded data.
- Throws: MIMEFormatException
- if data contains invalid characters,
i.e. not codes 0-32 and the other codes allowed for this
encoding, or is otherwise formatted incorrectly.
decode
public abstract byte[] decode(String msg) throws MIMEFormatException
- Decodes a encoded String. Characters with ASCII code points <= 32
(this includes whitespace and newlines) are ignored.
- Returns:
- the decoded data.
- Throws: MIMEFormatException
- if data contains invalid characters,
i.e. not codes 0-32 and the other codes allowed for this
encoding, or is otherwise formatted incorrectly.
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