java.lang.Object | +--java.io.OutputStream | +--java.io.FilterOutputStream | +--java.security.DigestOutputStream
Untamed: 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
write methods.
It is possible to turn this stream on or off (see
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.
MessageDigest,
DigestInputStreamDigestOutputStream(OutputStream stream,
MessageDigest digest)
void
setMessageDigest(MessageDigest digest)
String
toString()
void
write(byte[] b,
int off,
int len)
void
write(int b)
private boolean on
protected MessageDigest digest
public DigestOutputStream(OutputStream stream, MessageDigest digest)
stream - the output stream.digest - the message digest to associate with this stream.public MessageDigest getMessageDigest()
setMessageDigest(java.security.MessageDigest)public void setMessageDigest(MessageDigest digest)
digest - the message digest to be associated with this stream.getMessageDigest()public void write(int b) throws IOException
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.
write in class FilterOutputStreamb - the byte to be used for updating and writing to the
output stream.
IOExceptionMessageDigest.update(byte)public void write(byte[] b, int off, int len) throws IOException
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.
write in class FilterOutputStreamb - the array containing the subarray to be used for updating
and writing to the output stream.off - the offset into b of the first byte to
be updated and written.len - the number of bytes of data to be updated and written
from b, starting at offset off.
IOExceptionMessageDigest.update(byte[], int, int)public void on(boolean on)
write methods results in an
update on the message digest. But when it is off, the message
digest is not updated.
on - true to turn the digest function on, false to turn it
off.public String toString()