IT. Expert System.

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class DigestOutputStream
extends FilterOutputStream

• Field Summary

  Fields

  Modifier and Type	Field and Description
  protected MessageDigest	digest The message digest for this stream.

  • Fields inherited from class java.io.FilterOutputStream

    out

• Constructor Summary

  Constructors

  Constructor and Description
  DigestOutputStream(OutputStream stream, MessageDigest digest) Constructs a new instance of this DigestOutputStream, using the given stream and the digest.

• Method Summary

  Methods

  Modifier and Type	Method and Description
  MessageDigest	getMessageDigest() Returns the message digest for this stream.
  void	on(boolean on) Enables or disables the digest function (default is on).
  void	setMessageDigest(MessageDigest digest) Sets the message digest which this stream will use.
  String	toString() Returns a string containing a concise, human-readable description of this DigestOutputStream including the digest.
  void	write(byte[] b, int off, int len) Writes len bytes into the stream, starting from the specified offset.
  void	write(int b) Writes the specified int to the stream.

  • Methods inherited from class java.io.FilterOutputStream

    close, flush

  • Methods inherited from class java.io.OutputStream

    write

  • Methods inherited from class java.lang.Object

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

• Field Detail

  • digest

    protected MessageDigest digest

    The message digest for this stream.

• Constructor Detail

  • DigestOutputStream

    public DigestOutputStream(OutputStream stream,
                      MessageDigest digest)

    Constructs a new instance of this DigestOutputStream, using the given stream and the digest.

    Parameters:

    stream - the output stream.

    digest - the message digest.

• Method Detail

  • getMessageDigest

    public MessageDigest getMessageDigest()

    Returns the message digest for this stream.

    Returns:

    the message digest for this stream.

  • setMessageDigest

    public void setMessageDigest(MessageDigest digest)

    Sets the message digest which this stream will use.

    Parameters:

    digest - the message digest which this stream will use.

  • write

    public void write(int b)
               throws IOException

    Writes the specified int to the stream. Updates the digest if this function is on(boolean).

    Overrides:

    write in class FilterOutputStream

    Parameters:

    b - the byte to be written.

    Throws:

    IOException - if writing to the stream causes a IOException

  • write

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

    Writes len bytes into the stream, starting from the specified offset. Updates the digest if this function is on(boolean).

    Overrides:

    write in class FilterOutputStream

    Parameters:

    b - the buffer to write to.

    off - the index of the first byte in b to write.

    len - the number of bytes in b to write.

    Throws:

    IOException - if writing to the stream causes an IOException.

  • on

    public void on(boolean on)

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

    Parameters:

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

    See Also:

    MessageDigest

  • toString

    public String toString()

    Returns a string containing a concise, human-readable description of this DigestOutputStream including the digest.

    Overrides:

    toString in class Object

    Returns:

    a printable representation for this DigestOutputStream.