java.util.zip

Class CheckedOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.util.zip.CheckedOutputStream

public class CheckedOutputStream
extends FilterOutputStream

OutputStream that computes a checksum of data being written using a supplied Checksum object.

Author:

Tom Tromey

See Also:

Checksum

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
CheckedOutputStream(OutputStream out, Checksum cksum) Creates a new CheckInputStream on top of the supplied OutputStream using the supplied Checksum.

Method Summary

Modifier and Type	Method and Description
Checksum	getChecksum() Returns the Checksum object used.
void	write(byte[] buf, int off, int len) Writes the byte array to the OutputStream and updates the Checksum.
void	write(int bval) Writes one byte to the OutputStream and updates the Checksum.

Methods inherited from class java.io.FilterOutputStream

close, flush, write

Methods inherited from class java.io.OutputStream

finalize

Methods inherited from class java.lang.Object

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

Constructor Detail

CheckedOutputStream

public CheckedOutputStream(OutputStream out,
                           Checksum cksum)

Creates a new CheckInputStream on top of the supplied OutputStream using the supplied Checksum.

Method Detail

getChecksum

public Checksum getChecksum()

Returns the Checksum object used. To get the data checksum computed so far call getChecksum.getValue().

write

public void write(int bval)
           throws IOException

Writes one byte to the OutputStream and updates the Checksum.

Overrides:

write in class FilterOutputStream

Parameters:

bval - The byte to write, passed as an int.

Throws:

IOException - If an error occurs

write

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

Writes the byte array to the OutputStream and updates the Checksum.

Overrides:

write in class FilterOutputStream

Parameters:

buf - The byte array to write bytes from

off - The index into the array to start writing bytes from

len - The number of bytes to write

Throws:

IOException - If an error occurs