edu.vt.middleware.crypt.io
Class Base64FilterInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          edu.vt.middleware.crypt.io.AbstractEncodingFilterInputStream
              edu.vt.middleware.crypt.io.Base64FilterInputStream

All Implemented Interfaces:

Closeable

public class Base64FilterInputStream
extends AbstractEncodingFilterInputStream

Converts an input stream of base-64 encoded character bytes into raw bytes.

Version:

$Revision: 2745 $

Author:

Middleware Services

Field Summary

static int	LINE_LENGTH_64 Wrap lines at 64 characters.
static int	LINE_LENGTH_76 Wrap lines at 76 characters.

Fields inherited from class edu.vt.middleware.crypt.io.AbstractEncodingFilterInputStream

byteBuffer, CHUNK_SIZE, decodeBuffer, position

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Base64FilterInputStream(InputStream in)
Creates a base-64 filter input stream around the given input stream.

Base64FilterInputStream(InputStream in, int charsPerLine)
Creates a base-64 filter input stream around the given input stream.

Method Summary

protected void	fillBuffer() Reads characters from the input reader and decodes them to fill AbstractEncodingFilterInputStream.decodeBuffer.
protected int	getDecodeBufferCapacity() Gets the encoder that decodes encoded character data in the input stream to raw bytes.

Methods inherited from class edu.vt.middleware.crypt.io.AbstractEncodingFilterInputStream

read, read, read

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

LINE_LENGTH_64

public static final int LINE_LENGTH_64

Wrap lines at 64 characters.

See Also:

Constant Field Values

LINE_LENGTH_76

public static final int LINE_LENGTH_76

Wrap lines at 76 characters.

See Also:

Constant Field Values

Constructor Detail

Base64FilterInputStream

public Base64FilterInputStream(InputStream in)

Creates a base-64 filter input stream around the given input stream.

Parameters:

in - Input stream to wrap.

Base64FilterInputStream

public Base64FilterInputStream(InputStream in,
                               int charsPerLine)

Creates a base-64 filter input stream around the given input stream.

Parameters:

in - Input stream to wrap.

charsPerLine - Number of characters per line of encoded input. Must be one of LINE_LENGTH_64, LINE_LENGTH_76, or 0 to indicate no wrapping.

Method Detail

getDecodeBufferCapacity

protected int getDecodeBufferCapacity()

Gets the encoder that decodes encoded character data in the input stream to raw bytes.

Specified by:

getDecodeBufferCapacity in class AbstractEncodingFilterInputStream

Returns:

Encoder instance.

fillBuffer

protected void fillBuffer()
                   throws IOException

Reads characters from the input reader and decodes them to fill AbstractEncodingFilterInputStream.decodeBuffer.

Specified by:

fillBuffer in class AbstractEncodingFilterInputStream

Throws:

IOException - On read errors.