| java.lang.Object
 java.io.OutputStream
java.io.FilterOutputStream
java.security.DigestOutputStream
| DigestOutputStream | | public class DigestOutputStream extends FilterOutputStream (Code) | | A transparent stream that updates the associated message digest using
the bits going through the stream.
To complete the message digest computation, call one of the
digest methods on the associated message
digest after your calls to one of this digest ouput stream's
DigestOutputStream.write(int) write methods.
It is possible to turn this stream on or off (see
DigestOutputStream.on(boolean) on ). When it is on, a call to one of the
write methods results in
an update on the message digest. But when it is off, the message
digest is not updated. The default is for the stream to be on.
See Also: MessageDigest
See Also: DigestInputStream
version:
1.28 00/02/02
author:
Benjamin Renaud |
| Method Summary | |
| public MessageDigest | getMessageDigest()
Returns the message digest associated with this stream. | | public void | on(boolean on)
Turns the digest function on or off. | | public void | setMessageDigest(MessageDigest digest)
Associates the specified message digest with this stream. | | public String | toString()
Prints a string representation of this digest output stream and
its associated message digest object. | | public void | write(int b)
Updates the message digest (if the digest function is on) using
the specified byte, and in any case writes the byte
to the output stream. | | public void | write(byte[] b, int off, int len)
Updates the message digest (if the digest function is on) using
the specified subarray, and in any case writes the subarray to
the output stream. |
| DigestOutputStream | | public DigestOutputStream(OutputStream stream, MessageDigest digest)(Code) | | Creates a digest output stream, using the specified output stream
and message digest.
Parameters:
stream - the output stream.
Parameters:
digest - the message digest to associate with this stream. |
| on | | public void on(boolean on)(Code) | | Turns the digest function on or off. The default is on. When
it is on, a call to one of the write methods results in an
update on the message digest. But when it is off, the message
digest is not updated.
Parameters:
on - true to turn the digest function on, false to turn itoff. |
| toString | | public String toString()(Code) | | Prints a string representation of this digest output stream and
its associated message digest object.
|
| write | | public void write(int b) throws IOException(Code) | | Updates the message digest (if the digest function is on) using
the specified byte, and in any case writes the byte
to the output stream. That is, if the digest function is on
(see
DigestOutputStream.on(boolean) on ), this method calls
update on the message digest associated with this
stream, passing it the byte b. This method then
writes the byte to the output stream, blocking until the byte
is actually written.
Parameters:
b - the byte to be used for updating and writing to theoutput stream.
exception:
IOException - if an I/O error occurs.
See Also: MessageDigest.update(byte) |
| write | | public void write(byte[] b, int off, int len) throws IOException(Code) | | Updates the message digest (if the digest function is on) using
the specified subarray, and in any case writes the subarray to
the output stream. That is, if the digest function is on (see
DigestOutputStream.on(boolean) on ), this method calls update
on the message digest associated with this stream, passing it
the subarray specifications. This method then writes the subarray
bytes to the output stream, blocking until the bytes are actually
written.
Parameters:
b - the array containing the subarray to be used for updatingand writing to the output stream.
Parameters:
off - the offset into b of the first byte tobe updated and written.
Parameters:
len - the number of bytes of data to be updated and writtenfrom b, starting at offset off.
exception:
IOException - if an I/O error occurs.
See Also: MessageDigest.update(byte[]intint) |
|
|