Class Overview
DigestOutputStream is a FilterOutputStream which maintains an
associated message digest.
Summary
| Public Methods |
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MessageDigest
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getMessageDigest()
Returns the message digest for this stream.
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void
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on(boolean on)
Enables or disables the digest function (default is on).
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void
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setMessageDigest(MessageDigest digest)
Sets the message digest which this stream will use.
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String
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toString()
Returns a string containing a concise, human-readable description of this
DigestOutputStream including the digest.
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void
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write(int b)
Writes the specified int to the stream.
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void
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write(byte[] b, int off, int len)
Writes len bytes into the stream, starting from the specified
offset.
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[Expand]
Inherited Methods |
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From class java.io.FilterOutputStream
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void
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close()
Closes this stream.
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void
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flush()
Ensures that all pending data is sent out to the target stream.
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void
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write(byte[] buffer)
Writes the entire contents of the byte array buffer to this
stream.
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void
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write(int oneByte)
Writes one byte to the target stream.
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void
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write(byte[] buffer, int offset, int length)
Writes count bytes from the byte array buffer starting at
offset to the target stream.
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From class java.io.OutputStream
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void
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close()
Closes this stream.
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void
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flush()
Flushes this stream.
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void
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write(byte[] buffer)
Writes the entire contents of the byte array buffer to this
stream.
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abstract
void
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write(int oneByte)
Writes a single byte to this stream.
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void
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write(byte[] buffer, int offset, int count)
Writes count bytes from the byte array buffer starting at
position offset to this stream.
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From class java.lang.Object
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Object
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clone()
Creates and returns a copy of this Object.
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boolean
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equals(Object o)
Compares this instance with the specified object and indicates if they
are equal.
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void
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finalize()
Is called before the object's memory is being reclaimed by the VM.
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final
Class<? extends Object>
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getClass()
Returns the unique instance of Class which represents this
object's class. |
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int
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hashCode()
Returns an integer hash code for this object.
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final
void
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notify()
Causes a thread which is waiting on this object's monitor (by means of
calling one of the wait() methods) to be woken up.
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final
void
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notifyAll()
Causes all threads which are waiting on this object's monitor (by means
of calling one of the wait() methods) to be woken up.
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String
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toString()
Returns a string containing a concise, human-readable description of this
object.
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final
void
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wait(long millis, int nanos)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait(long millis)
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object or until the
specified timeout expires.
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final
void
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wait()
Causes the calling thread to wait until another thread calls the notify() or notifyAll() method of this object.
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From interface java.io.Closeable
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abstract
void
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close()
Closes the object and release any system resources it holds.
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From interface java.io.Flushable
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abstract
void
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flush()
Flushes the object by writing out any buffered data to the underlying
output.
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Fields
The message digest for this stream.
Public Constructors
Constructs a new instance of this DigestOutputStream, using the
given stream and the digest.
Parameters
| stream
| the output stream. |
| digest
| the message digest.
|
Public Methods
public
MessageDigest
getMessageDigest
()
Returns the message digest for this stream.
Returns
- the message digest for this stream.
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. |
public
void
setMessageDigest
(MessageDigest digest)
Sets the message digest which this stream will use.
Parameters
| digest
| the message digest which this stream will use.
|
public
String
toString
()
Returns a string containing a concise, human-readable description of this
DigestOutputStream including the digest.
Returns
- a printable representation for this
DigestOutputStream.
public
void
write
(int b)
Writes the specified int to the stream. Updates the digest if
this function is on(boolean).
Parameters
| b
| the byte to be written. |
Throws
| IOException
| if writing to the stream causes a IOException
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public
void
write
(byte[] b, int off, int len)
Writes len bytes into the stream, starting from the specified
offset. Updates the digest if this function is on(boolean).
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.
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