oracle.security.crypto.core

Class CoderInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

oracle.security.crypto.core.CoderInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class CoderInputStream
extends java.io.FilterInputStream

An input stream that encodes or decodes data passing through it.

To specify the Coder object that is used by the input stream to encode or decode the data, use the setCoder() method.

After filling a buffer of block size, the Coder object is used to encode or decode the buffer. The setMode() method is used to specify encoding or decoding mode (the default mode is decode.)

An IOException is thrown if there is not enough data to fill the buffer.

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	buf The buffer which stores the data.
protected Coder	coder The Coder used by this stream.
protected int	count The number of bytes in the buffer.
static int	DECODE_MODE The DECODE mode.
static int	ENCODE_MODE The ENCODE mode.
protected int	mode the current mode

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
CoderInputStream(java.io.InputStream is, Coder c) Create a new CoderInputStream with the buffer size equal to the Coder block size.

Method Summary

Methods

Modifier and Type	Method and Description
int	available() Return the number of bytes that can be read without blocking.
Coder	getCoder() Get the Coder used in this stream.
int	getMode() Get the current mode.
int	read() Read one byte of data.
int	read(byte[] b, int off, int len) Reads into an array of bytes.
void	setMode(int m) Set the mode of the stream.

Methods inherited from class java.io.FilterInputStream

close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

DECODE_MODE

public static final int DECODE_MODE

The DECODE mode.

See Also:

Constant Field Values

ENCODE_MODE

public static final int ENCODE_MODE

The ENCODE mode.

See Also:

Constant Field Values

mode

protected int mode

the current mode

coder

protected Coder coder

The Coder used by this stream.

buf

protected byte[] buf

The buffer which stores the data.

count

protected int count

The number of bytes in the buffer.

Constructor Detail

CoderInputStream

public CoderInputStream(java.io.InputStream is,
                Coder c)

Create a new CoderInputStream with the buffer size equal to the Coder block size.

Method Detail

getCoder

public Coder getCoder()

Get the Coder used in this stream.

getMode

public int getMode()

Get the current mode.

setMode

public void setMode(int m)

Set the mode of the stream.

read

public int read()
         throws java.io.IOException

Read one byte of data. Blocks if no data is available.

Overrides:

read in class java.io.FilterInputStream

Returns:

the byte read, or -1 if end of stream reached.

Throws:

java.io.IOException

read

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

Reads into an array of bytes. Blocks if no data is available.

Overrides:

read in class java.io.FilterInputStream

Parameters:

b - the buffer which the data is read into

off - start offset of data

len - maximum number of bytes read

Returns:

the number of bytes read, or -1 if end of stream reached.

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

Return the number of bytes that can be read without blocking.

Overrides:

available in class java.io.FilterInputStream

Throws:

java.io.IOException