public Class CheckedOutputStream

Class Inheritance

Imports

java.io.FilterOutputStream, .OutputStream, .IOException

An output stream that also maintains a checksum of the data being written. The checksum can then be used to verify the integrity of the output data.

Author: David Connelly
Since: 1.1
See Also: Checksum

Field Summary

Modifier and Type	Field and Description
private Checksum	cksum

Inherited from java.io.FilterOutputStream:: out

Constructor Summary

Access	Constructor and Description
public	CheckedOutputStream(OutputStream the output stream out, Checksum the checksum cksum) Creates an output stream with the specified Checksum.

Method Summary

Modifier and Type	Method and Description
public Checksum	Returns: the Checksum getChecksum() Returns the Checksum for this output stream.
public void	write(int the byte to be written b) Overrides java.io.FilterOutputStream.write. Writes a byte.
public void	write(byte[] the data to be written b, int the start offset of the data off, int the number of bytes to be written len) Overrides java.io.FilterOutputStream.write. Writes an array of bytes.

Inherited from java.io.FilterOutputStream:: close flush write

Field Detail

cksum	back to summary
private Checksum cksum

Constructor Detail

CheckedOutputStream	back to summary
public CheckedOutputStream(OutputStream out, Checksum cksum) Creates an output stream with the specified Checksum. Parameters out:OutputStream the output stream cksum:Checksum the checksum

CheckedOutputStream

back to summary

public CheckedOutputStream(OutputStream out, Checksum cksum)

Creates an output stream with the specified Checksum.

Parameters

out:OutputStream: the output stream
cksum:Checksum: the checksum

Method Detail

getChecksum	back to summary
public Checksum getChecksum() Returns the Checksum for this output stream. Returns:Checksum the Checksum

getChecksum

back to summary

public Checksum getChecksum()

Returns the Checksum for this output stream.

Returns:Checksum: the Checksum

write	back to summary
public void write(int b) throws IOException Overrides java.io.FilterOutputStream.write. Writes a byte. Will block until the byte is actually written. Parameters b:int the byte to be written Exceptions IOException: if an I/O error has occurred

write

back to summary

public void write(int b) throws IOException

Overrides java.io.FilterOutputStream.write.

Writes a byte. Will block until the byte is actually written.

Parameters

b:int: the byte to be written

Exceptions

IOException:: if an I/O error has occurred

write	back to summary
public void write(byte[] b, int off, int len) throws IOException Overrides java.io.FilterOutputStream.write. Writes an array of bytes. Will block until the bytes are actually written. Parameters b:byte[] the data to be written off:int the start offset of the data len:int the number of bytes to be written Exceptions IOException: if an I/O error has occurred

write

back to summary

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

Overrides java.io.FilterOutputStream.write.

Writes an array of bytes. Will block until the bytes are actually written.

Parameters

b:byte[]: the data to be written
off:int: the start offset of the data
len:int: the number of bytes to be written

Exceptions

IOException:: if an I/O error has occurred