javax.crypto
Class CipherInputStream

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          javax.crypto.CipherInputStream

All Implemented Interfaces:

Closeable

public class CipherInputStream
extends FilterInputStream

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

protected	CipherInputStream(InputStream is)
	CipherInputStream(InputStream is, Cipher c)

Method Summary

int	available() Returns a int representing the number of bytes that are available before this FilterInputStream will block.
void	close() Close this FilterInputStream.
boolean	markSupported() Returns a boolean indicating whether or not this FilterInputStream supports mark() and reset().
int	read() Reads a single byte from this FilterInputStream and returns the result as an int.
int	read(byte[] b) Reads bytes from this FilterInputStream and stores them in byte array buffer.
int	read(byte[] b, int off, int len) Reads at most count bytes from this FilterInputStream and stores them in byte array buffer starting at offset.
long	skip(long n) Skips count number of bytes in this InputStream.

Methods inherited from class java.io.FilterInputStream

mark, reset

Methods inherited from class java.lang.Object

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

Constructor Detail

CipherInputStream

public CipherInputStream(InputStream is,
                         Cipher c)

CipherInputStream

protected CipherInputStream(InputStream is)

Method Detail

read

public int read()
         throws IOException

Description copied from class: FilterInputStream

Reads a single byte from this FilterInputStream and returns the result as an int. The low-order byte is returned or -1 of the end of stream was encountered. This implementation returns a byte from the target stream.

Overrides:

read in class FilterInputStream

Returns:

the byte read or -1 if end of stream.

Throws:

IOException - If the stream is already closed or another IOException occurs.

read

public int read(byte[] b)
         throws IOException

Description copied from class: FilterInputStream

Reads bytes from this FilterInputStream and stores them in byte array buffer. Answer the number of bytes actually read or -1 if no bytes were read and end of stream was encountered. This implementation reads bytes from the target stream.

Overrides:

read in class FilterInputStream

Parameters:

b - the byte array in which to store the read bytes.

Returns:

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

Throws:

IOException - If the stream is already closed or another IOException occurs.

read

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

Description copied from class: FilterInputStream

Reads at most count bytes from this FilterInputStream and stores them in byte array buffer starting at offset. Answer the number of bytes actually read or -1 if no bytes were read and end of stream was encountered. This implementation reads bytes from the target stream.

Overrides:

read in class FilterInputStream

Parameters:

b - the byte array in which to store the read bytes.

off - the offset in buffer to store the read bytes.

len - the maximum number of bytes to store in buffer.

Returns:

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

Throws:

IOException - If the stream is already closed or another IOException occurs.

skip

public long skip(long n)
          throws IOException

Description copied from class: FilterInputStream

Skips count number of bytes in this InputStream. Subsequent read()'s will not return these bytes unless reset() is used. This implementation skips count number of bytes in the target stream.

Overrides:

skip in class FilterInputStream

Parameters:

n - the number of bytes to skip.

Returns:

the number of bytes actually skipped.

Throws:

IOException - If the stream is already closed or another IOException occurs.

available

public int available()
              throws IOException

Description copied from class: FilterInputStream

Returns a int representing the number of bytes that are available before this FilterInputStream will block. This method returns the number of bytes available in the target stream.

Overrides:

available in class FilterInputStream

Returns:

the number of bytes available before blocking.

Throws:

IOException - If an error occurs in this stream.

close

public void close()
           throws IOException

Description copied from class: FilterInputStream

Close this FilterInputStream. This implementation closes the target stream.

Specified by:

close in interface Closeable

Overrides:

close in class FilterInputStream

Throws:

IOException - If an error occurs attempting to close this stream.

markSupported

public boolean markSupported()

Description copied from class: FilterInputStream

Returns a boolean indicating whether or not this FilterInputStream supports mark() and reset(). This implementation returns whether or not the target stream supports marking.

Overrides:

markSupported in class FilterInputStream

Returns:

true if mark() and reset() are supported, false otherwise.