freenet.support.io

Class PrependLengthOutputStream

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

freenet.support.io.PrependLengthOutputStream

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class PrependLengthOutputStream
extends java.io.FilterOutputStream

Write to a temporary Bucket. On close, if not abort()'ed, write length and then copy the data. Does not close the underlying Bucket.

Field Summary

Fields inherited from class java.io.FilterOutputStream

out

Method Summary

Modifier and Type	Method and Description
boolean	abort() Abort the stream.
void	close()
static PrependLengthOutputStream	create(java.io.OutputStream out, BucketFactory bf, int offset, boolean closeUnderlying) Create a stream which writes to temporary space and then on a non-aborted close() will write the length (minus the offset) followed by the data.
void	write(byte[] buf)
void	write(byte[] buf, int offset, int length)

Methods inherited from class java.io.FilterOutputStream

flush, write

Methods inherited from class java.lang.Object

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

Method Detail

create

public static PrependLengthOutputStream create(java.io.OutputStream out,
                                               BucketFactory bf,
                                               int offset,
                                               boolean closeUnderlying)
                                        throws java.io.IOException

Create a stream which writes to temporary space and then on a non-aborted close() will write the length (minus the offset) followed by the data.

Throws:

java.io.IOException

write

public void write(byte[] buf,
                  int offset,
                  int length)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

write

public void write(byte[] buf)
           throws java.io.IOException

Overrides:

write in class java.io.FilterOutputStream

Throws:

java.io.IOException

abort

public boolean abort()
              throws java.io.IOException

Abort the stream. Will write a length of 0 when close()'ed.

Returns:

False if the stream has already been closed.

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.FilterOutputStream

Throws:

java.io.IOException