gnu.mail.util

Class QInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

gnu.mail.util.QPInputStream

gnu.mail.util.QInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class QInputStream
extends QPInputStream

Provides RFC 2047 "B" transfer encoding. See section 4.2:

The "Q" encoding is similar to the "Quoted-Printable" content- transfer-encoding defined in RFC 2045. It is designed to allow text containing mostly ASCII characters to be decipherable on an ASCII terminal without decoding.

1. Any 8-bit value may be represented by a "=" followed by two hexadecimal digits. For example, if the character set in use were ISO-8859-1, the "=" character would thus be encoded as "=3D", and a SPACE by "=20". (Upper case should be used for hexadecimal digits "A" through "F".)
2. The 8-bit hexadecimal value 20(e.g., ISO-8859-1 SPACE) may be represented as "_"(underscore, ASCII 95.). (This character may not pass through some internetwork mail gateways, but its use will greatly enhance readability of "Q" encoded data with mail readers that do not support this encoding.) Note that the "_" always represents hexadecimal 20, even if the SPACE character occupies a different code position in the character set in use.
3. 8-bit values which correspond to printable ASCII characters other than "=", "?", and "_"(underscore), MAY be represented as those characters. (But see section 5 for restrictions.) In particular, SPACE and TAB MUST NOT be represented as themselves within encoded words.

Field Summary

Fields inherited from class gnu.mail.util.QPInputStream

spaceCount

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
QInputStream(java.io.InputStream in) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
int	read() Read a character.

Methods inherited from class gnu.mail.util.QPInputStream

available, markSupported, read

Methods inherited from class java.io.FilterInputStream

close, mark, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

QInputStream

public QInputStream(java.io.InputStream in)

Constructor.

Parameters:

in - the underlying input stream.

Method Detail

read

public int read()
         throws java.io.IOException

Read a character.

Overrides:

read in class QPInputStream

Throws:

java.io.IOException