jxl.util
Class Base64.InputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          jxl.util.Base64.InputStream

All Implemented Interfaces:

java.io.Closeable

Enclosing class:

Base64

public static class Base64.InputStream
extends java.io.FilterInputStream

A Base64.InputStream will read data from another java.io.InputStream, given in the constructor, and encode/decode to/from Base64 notation on the fly.

Since:

1.3

See Also:

Base64

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Base64.InputStream(java.io.InputStream in)
Constructs a Base64.InputStream in DECODE mode.

Base64.InputStream(java.io.InputStream in, int options)
Constructs a Base64.InputStream in either ENCODE or DECODE mode.

Method Summary

int	read() Reads enough of the input stream to convert to/from Base64 and returns the next byte.
int	read(byte[] dest, int off, int len) Calls read() repeatedly until the end of stream is reached or len bytes are read.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

Base64.InputStream

public Base64.InputStream(java.io.InputStream in)

Constructs a Base64.InputStream in DECODE mode.

Parameters:

in - the java.io.InputStream from which to read data.

Since:

1.3

Base64.InputStream

public Base64.InputStream(java.io.InputStream in,
                          int options)

Constructs a Base64.InputStream in either ENCODE or DECODE mode.

Valid options:

   ENCODE or DECODE: Encode or Decode as data is read.
   DONT_BREAK_LINES: don't break lines at 76 characters
     (only meaningful when encoding)
     Note: Technically, this makes your encoding non-compliant.
 

Example: new Base64.InputStream( in, Base64.DECODE )

Parameters:

in - the java.io.InputStream from which to read data.

options - Specified options

Since:

2.0

See Also:

Base64.ENCODE, Base64.DECODE, Base64.DONT_BREAK_LINES

Method Detail

read

public int read()
         throws java.io.IOException

Reads enough of the input stream to convert to/from Base64 and returns the next byte.

Overrides:

read in class java.io.FilterInputStream

Returns:

next byte

Throws:

java.io.IOException

Since:

1.3

read

public int read(byte[] dest,
                int off,
                int len)
         throws java.io.IOException

Calls read() repeatedly until the end of stream is reached or len bytes are read. Returns number of bytes read into array or -1 if end of stream is encountered.

Overrides:

read in class java.io.FilterInputStream

Parameters:

dest - array to hold values

off - offset for array

len - max number of bytes to read into array

Returns:

bytes read into array or -1 if end of stream is encountered.

Throws:

java.io.IOException

Since:

1.3