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gnu.mail.util

Class Base64OutputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable
    Direct Known Subclasses:
    BOutputStream


    public class Base64OutputStream
    extends java.io.FilterOutputStream
    A Base64 content transfer encoding filter stream.

    From RFC 2045, section 6.8:

    The Base64 Content-Transfer-Encoding is designed to represent arbitrary sequences of octets in a form that need not be humanly readable. The encoding and decoding algorithms are simple, but the encoded data are consistently only about 33 percent larger than the unencoded data.

    • Field Summary

      • Fields inherited from class java.io.FilterOutputStream

        out
    • Constructor Summary

      Constructors
      Constructor and Description
      Base64OutputStream (java.io.OutputStream out)
      Default constructor.
      Base64OutputStream (java.io.OutputStream out, int lineLength)
      Constructor.
    • Method Summary

      Methods
      Modifier and Type Method and Description
      void close ()
      Closes this output stream and releases any system resources associated with this stream.
      void flush ()
      Flushes this output stream and forces any buffered output bytes to be written out.
      void write (byte[] b)
      Writes b.length bytes from the specified byte array to this output stream.
      void write (byte[] b, int off, int len)
      Writes len bytes from the specified byte array starting at offset off to this output stream.
      void write (int c)
      Writes the specified byte to this output stream.
      • Methods inherited from class java.lang.Object

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

      • Base64OutputStream

        public Base64OutputStream(java.io.OutputStream out)
        Default constructor. This constructs a Base64OutputStream with a line length of 76.
      • Base64OutputStream

        public Base64OutputStream(java.io.OutputStream out,
         int lineLength)
        Constructor.
        Parameters:
        out - the underlying output stream to encode
        lineLength - the line length
    • Method Detail

      • write

        public void write(int c)
         throws java.io.IOException
        Writes the specified byte to this output stream.
        Overrides:
        write in class java.io.FilterOutputStream
        Throws:
        java.io.IOException
      • write

        public void write(byte[] b)
         throws java.io.IOException
        Writes b.length bytes from the specified byte array to this output stream.
        Overrides:
        write in class java.io.FilterOutputStream
        Throws:
        java.io.IOException
      • write

        public void write(byte[] b,
         int off,
         int len)
         throws java.io.IOException
        Writes len bytes from the specified byte array starting at offset off to this output stream.
        Overrides:
        write in class java.io.FilterOutputStream
        Throws:
        java.io.IOException
      • flush

        public void flush()
         throws java.io.IOException
        Flushes this output stream and forces any buffered output bytes to be written out.
        Specified by:
        flush in interface java.io.Flushable
        Overrides:
        flush in class java.io.FilterOutputStream
        Throws:
        java.io.IOException
      • close

        public void close()
         throws java.io.IOException
        Closes this output stream and releases any system resources associated with this stream.
        Specified by:
        close in interface java.io.Closeable
        Specified by:
        close in interface java.lang.AutoCloseable
        Overrides:
        close in class java.io.FilterOutputStream
        Throws:
        java.io.IOException

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