java.security
Class DigestOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          java.security.DigestOutputStream

All Implemented Interfaces:

Closeable, Flushable

public class DigestOutputStream
extends FilterOutputStream

Field Summary

protected MessageDigest

digest

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

DigestOutputStream(OutputStream stream, MessageDigest digest)

Method Summary

MessageDigest	getMessageDigest() Returns the MessageDigest which the receiver uses when computing the hash.
void	on(boolean on) Enables or disables the digest function (default is on).
void	setMessageDigest(MessageDigest digest) Sets the MessageDigest which the receiver will use when computing the hash.
String	toString() Returns a string containing a concise, human-readable description of the receiver.
void	write(byte[] b, int off, int len) Writes count bytes from the byte array buffer starting at offset to this FilterOutputStream.
void	write(int b) Writes the specified byte oneByte to this FilterOutputStream.

Methods inherited from class java.io.FilterOutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Field Detail

digest

protected MessageDigest digest

Constructor Detail

DigestOutputStream

public DigestOutputStream(OutputStream stream,
                          MessageDigest digest)

Method Detail

getMessageDigest

public MessageDigest getMessageDigest()

Returns the MessageDigest which the receiver uses when computing the hash.

Returns:

MessageDigest the digest the receiver uses when computing the hash.

setMessageDigest

public void setMessageDigest(MessageDigest digest)

Sets the MessageDigest which the receiver will use when computing the hash.

Parameters:

digest - MessageDigest the digest to use when computing the hash.

See Also:

MessageDigest, on(boolean)

write

public void write(int b)
           throws IOException

Description copied from class: FilterOutputStream

Writes the specified byte oneByte to this FilterOutputStream. Only the low order byte of oneByte is written. This implementation writes the byte to the target OutputStream.

Overrides:

write in class FilterOutputStream

Parameters:

b - the byte to be written

Throws:

IOException - If an error occurs attempting to write to this FilterOutputStream.

write

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

Description copied from class: FilterOutputStream

Writes count bytes from the byte array buffer starting at offset to this FilterOutputStream. This implementation writes the buffer to the target OutputStream.

Overrides:

write in class FilterOutputStream

Parameters:

b - the buffer to be written

off - offset in buffer to get bytes

len - number of bytes in buffer to write

Throws:

IOException - If an error occurs attempting to write to this FilterOutputStream.

on

public void on(boolean on)

Enables or disables the digest function (default is on).

Parameters:

on - boolean true if the digest should be computed, and false otherwise.

See Also:

MessageDigest

toString

public String toString()

Returns a string containing a concise, human-readable description of the receiver.

Overrides:

toString in class Object

Returns:

String a printable representation for the receiver.