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gnu.mail.util

Class QOutputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

    public class QOutputStream
extends QPOutputStream
    Provides RFC 2047 "B" transfer decoding. 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 java.io.FilterOutputStream

        out

    • Constructor Summary

      Constructors
      Constructor and Description
      QOutputStream (java.io.OutputStream out, boolean word)
      Constructor.

    • Method Summary

      Methods
      Modifier and Type Method and Description
      static int encodedLength (byte[] bytes, boolean word)
      void write (int c)
      Write a character to the stream.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • QOutputStream

        public QOutputStream(java.io.OutputStream out,
 boolean word)
        Constructor. The word parameter is used to indicate whether the bytes passed to this stream are considered to be RFC 822 "word" tokens or "text" tokens.
        Parameters:
        out - the underlying output stream
        word - word mode if true, text mode otherwise

    • Method Detail

      • write

        public void write(int c)
 throws java.io.IOException
        Write a character to the stream.
        Overrides:
        write in class QPOutputStream
        Parameters:
        c - Byte to write to the stream
        Throws:
        java.io.IOException - IO Exception occurred

      • encodedLength

        public static int encodedLength(byte[] bytes,
 boolean word)

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