java.util.zip
Class CheckedOutputStream

java.lang.Object
  java.io.OutputStream
      java.io.FilterOutputStream
          java.util.zip.CheckedOutputStream

public class CheckedOutputStream

extends FilterOutputStream

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

See Also:

Checksum

Field Summary

private Checksum

cksum

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

CheckedOutputStream(OutputStream out, Checksum cksum)
Creates an output stream with the specified Checksum.

Method Summary

Checksum	getChecksum() Returns the Checksum for this output stream.
void	write(byte[] b, int off, int len) Writes an array of bytes.
void	write(int b) Writes a byte.

Methods inherited from class java.io.FilterOutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Field Detail

cksum

private Checksum cksum

Constructor Detail

CheckedOutputStream

public CheckedOutputStream(OutputStream out,
                           Checksum cksum)

Creates an output stream with the specified Checksum.

Parameters:

out - the output stream

cksum - the checksum

Method Detail

write

public void write(int b)
           throws IOException

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

Overrides:

write in class FilterOutputStream

Parameters:

b - the byte to be written

Throws:

IOException - if an I/O error has occurred

write

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

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

Overrides:

write in class FilterOutputStream

Parameters:

b - the data to be written

off - the start offset of the data

len - the number of bytes to be written

Throws:

IOException - if an I/O error has occurred

See Also:

FilterOutputStream.write(int)

getChecksum

public Checksum getChecksum()

Returns the Checksum for this output stream.

Returns:

the Checksum