Class PGPLiteralDataGenerator


  • public class PGPLiteralDataGenerator
    extends java.lang.Object
    Generator for producing literal data packets.

    A PGPLiteralData is used by invoking one of the open functions to create an OutputStream that raw data can be supplied to for encoding:

    A PGPLiteralDataGenerator is usually used to wrap the OutputStream obtained from a PGPEncryptedDataGenerator or a PGPCompressedDataGenerator.

    Once literal data has been written to the constructed OutputStream, writing of the object stream is completed by closing the OutputStream obtained from the open() method, or equivalently invoking close() on this generator.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static char BINARY
      Format tag for binary literal data
      static java.lang.String CONSOLE
      The special name indicating a "for your eyes only" packet.
      static java.util.Date NOW
      The special time for a modification time of "now" or the present time.
      static char TEXT
      Format tag for textual literal data
      static char UTF8
      Format tag for UTF-8 encoded textual literal data
    • Constructor Summary

      Constructors 
      Constructor Description
      PGPLiteralDataGenerator()
      Constructs a generator for literal data objects.
      PGPLiteralDataGenerator​(boolean oldFormat)
      Constructs a generator for literal data objects, specifying to use new or old (PGP 2.6.x compatible) format.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void close()
      Close the literal data packet - this is equivalent to calling close on the stream returned by the open() method.
      java.io.OutputStream open​(java.io.OutputStream out, char format, java.io.File file)
      Open a literal data packet for the passed in File object, returning an output stream for saving the file contents.
      java.io.OutputStream open​(java.io.OutputStream out, char format, java.lang.String name, long length, java.util.Date modificationTime)
      Open a literal data packet, returning a stream to store the data inside the packet.
      java.io.OutputStream open​(java.io.OutputStream out, char format, java.lang.String name, java.util.Date modificationTime, byte[] buffer)
      Open a literal data packet, returning a stream to store the data inside the packet as an indefinite-length stream.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • BINARY

        public static final char BINARY
        Format tag for binary literal data
        See Also:
        Constant Field Values
      • TEXT

        public static final char TEXT
        Format tag for textual literal data
        See Also:
        Constant Field Values
      • UTF8

        public static final char UTF8
        Format tag for UTF-8 encoded textual literal data
        See Also:
        Constant Field Values
      • CONSOLE

        public static final java.lang.String CONSOLE
        The special name indicating a "for your eyes only" packet.
        See Also:
        Constant Field Values
      • NOW

        public static final java.util.Date NOW
        The special time for a modification time of "now" or the present time.
    • Constructor Detail

      • PGPLiteralDataGenerator

        public PGPLiteralDataGenerator()
        Constructs a generator for literal data objects.
      • PGPLiteralDataGenerator

        public PGPLiteralDataGenerator​(boolean oldFormat)
        Constructs a generator for literal data objects, specifying to use new or old (PGP 2.6.x compatible) format.

        This can be used for compatibility with PGP 2.6.x.

        Parameters:
        oldFormat - true to use PGP 2.6.x compatible format.
    • Method Detail

      • open

        public java.io.OutputStream open​(java.io.OutputStream out,
                                         char format,
                                         java.lang.String name,
                                         long length,
                                         java.util.Date modificationTime)
                                  throws java.io.IOException
        Open a literal data packet, returning a stream to store the data inside the packet.

        The stream created can be closed off by either calling close() on the stream or close() on the generator. Closing the returned stream does not close off the OutputStream parameter out.

        Parameters:
        out - the underlying output stream to write the literal data packet to.
        format - the format of the literal data that will be written to the output stream (one of BINARY, TEXT or UTF8).
        name - the name of the "file" to encode in the literal data object.
        length - the length of the data that will be written.
        modificationTime - the time of last modification we want stored.
        Throws:
        java.io.IOException
      • open

        public java.io.OutputStream open​(java.io.OutputStream out,
                                         char format,
                                         java.lang.String name,
                                         java.util.Date modificationTime,
                                         byte[] buffer)
                                  throws java.io.IOException
        Open a literal data packet, returning a stream to store the data inside the packet as an indefinite-length stream. The stream is written out as a series of partial packets with a chunk size determined by the size of the passed in buffer.

        The stream created can be closed off by either calling close() on the stream or close() on the generator. Closing the returned stream does not close off the OutputStream parameter out.

        Note: if the buffer is not a power of 2 in length only the largest power of 2 bytes worth of the buffer will be used.

        Parameters:
        out - the underlying output stream to write the literal data packet to.
        format - the format of the literal data that will be written to the output stream (one of BINARY, TEXT or UTF8).
        name - the name of the "file" to encode in the literal data object.
        modificationTime - the time of last modification we want stored (will be stored to second level precision).
        buffer - a buffer to use to buffer and write partial packets. The returned stream takes ownership of the buffer.
        Returns:
        the output stream to write data to.
        Throws:
        java.io.IOException - if an error occurs writing stream header information to the provider output stream.
        java.lang.IllegalStateException - if this generator already has an open OutputStream.
      • open

        public java.io.OutputStream open​(java.io.OutputStream out,
                                         char format,
                                         java.io.File file)
                                  throws java.io.IOException
        Open a literal data packet for the passed in File object, returning an output stream for saving the file contents.

        This method configures the generator to store the file contents in a single literal data packet, taking the filename and modification time from the file, but does not store the actual file data.

        The stream created can be closed off by either calling close() on the stream or close() on the generator. Closing the returned stream does not close off the OutputStream parameter out.

        Parameters:
        out - the underlying output stream to write the literal data packet to.
        format - the format of the literal data that will be written to the output stream (one of BINARY, TEXT or UTF8).
        file - the file to determine the length and filename from.
        Returns:
        the output stream to write data to.
        Throws:
        java.io.IOException - if an error occurs writing stream header information to the provider output stream.
        java.lang.IllegalStateException - if this generator already has an open OutputStream.
      • close

        public void close()
                   throws java.io.IOException
        Close the literal data packet - this is equivalent to calling close on the stream returned by the open() method.
        Throws:
        java.io.IOException