Module jakarta.mail
Package com.sun.mail.util

Class QPDecoderStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable
    Direct Known Subclasses:
    QDecoderStream
    public class QPDecoderStream
extends java.io.FilterInputStream
    This class implements a QP Decoder. It is implemented as a FilterInputStream, so one can just wrap this class around any input stream and read bytes from this filter. The decoding is done as the bytes are read out.
    Author:
    John Mani

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected byte[] ba  
      protected int spaces  

      • Fields inherited from class java.io.FilterInputStream

        in

    • Constructor Summary

      Constructors 
      Constructor Description
      QPDecoderStream​(java.io.InputStream in)
      Create a Quoted Printable decoder that decodes the specified input stream.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()
      Returns the number of bytes that can be read from this input stream without blocking.
      boolean markSupported()
      Tests if this input stream supports marks.
      int read()
      Read the next decoded byte from this input stream.
      int read​(byte[] buf, int off, int len)
      Reads up to len decoded bytes of data from this input stream into an array of bytes.
      long skip​(long n)
      Skips over and discards n bytes of data from this stream.

      • Methods inherited from class java.io.FilterInputStream

        close, mark, read, reset

      • Methods inherited from class java.io.InputStream

        nullInputStream, readAllBytes, readNBytes, readNBytes, transferTo

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • ba

        protected byte[] ba

      • spaces

        protected int spaces

    • Constructor Detail

      • QPDecoderStream

        public QPDecoderStream​(java.io.InputStream in)
        Create a Quoted Printable decoder that decodes the specified input stream.
        Parameters:
        in - the input stream

    • Method Detail

      • read

        public int read()
         throws java.io.IOException
        Read the next decoded byte from this input stream. The byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.
        Overrides:
        read in class java.io.FilterInputStream
        Returns:
        the next byte of data, or -1 if the end of the stream is reached.
        Throws:
        java.io.IOException - if an I/O error occurs.

      • read

        public int read​(byte[] buf,
                int off,
                int len)
         throws java.io.IOException
        Reads up to len decoded bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

        Overrides:
        read in class java.io.FilterInputStream
        Parameters:
        buf - the buffer into which the data is read.
        off - the start offset of the data.
        len - the maximum number of bytes read.
        Returns:
        the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.
        Throws:
        java.io.IOException - if an I/O error occurs.

      • skip

        public long skip​(long n)
          throws java.io.IOException
        Skips over and discards n bytes of data from this stream.
        Overrides:
        skip in class java.io.FilterInputStream
        Throws:
        java.io.IOException

      • markSupported

        public boolean markSupported()
        Tests if this input stream supports marks. Currently this class does not support marks
        Overrides:
        markSupported in class java.io.FilterInputStream

      • available

        public int available()
              throws java.io.IOException
        Returns the number of bytes that can be read from this input stream without blocking. The QP algorithm does not permit a priori knowledge of the number of bytes after decoding, so this method just invokes the available method of the original input stream.
        Overrides:
        available in class java.io.FilterInputStream
        Throws:
        java.io.IOException