de.unkrig.commons.io.pipe
Class AbstractRingBuffer

java.lang.Object
  de.unkrig.commons.io.pipe.AbstractPipe
      de.unkrig.commons.io.pipe.AbstractRingBuffer

All Implemented Interfaces:

Pipe, java.io.Closeable

public abstract class AbstractRingBuffer
extends AbstractPipe

Implementation of a pipe by a ring buffer.

Constructor Summary

AbstractRingBuffer(long capacity)

Method Summary

abstract void	get(long pos, byte[] buf, int off, int len) Transfers len bytes from the backing store to buf[off]....
boolean	isEmpty()
boolean	isFull()
abstract void	put(byte[] buf, int off, int len, long pos) Transfers len bytes from buf[off]... to the backing store.
int	read(byte[] buf, int off, int len)
int	write(byte[] buf, int off, int len)

Methods inherited from class de.unkrig.commons.io.pipe.AbstractPipe

finalize

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.unkrig.commons.io.pipe.Pipe

close

Constructor Detail

AbstractRingBuffer

public AbstractRingBuffer(long capacity)

Method Detail

get

public abstract void get(long pos,
                         byte[] buf,
                         int off,
                         int len)
                  throws java.io.IOException

Transfers len bytes from the backing store to buf[off]....

Parameters:

pos - 0...capacity

off - 0...buf.length

len - 0...min(capacity - pos, buf.length - off

Throws:

java.io.IOException

See Also:

AbstractRingBuffer(long)

put

public abstract void put(byte[] buf,
                         int off,
                         int len,
                         long pos)
                  throws java.io.IOException

Transfers len bytes from buf[off]... to the backing store.

Parameters:

off - 0...buf.length

len - 0...min(capacity - pos, buf.length - off

pos - 0...capacity

Throws:

java.io.IOException

See Also:

AbstractRingBuffer(long)

read

public final int read(byte[] buf,
                      int off,
                      int len)
               throws java.io.IOException

Returns:

The number of bytes read; 0 iff the pipe is empty

Throws:

java.io.IOException

write

public final int write(byte[] buf,
                       int off,
                       int len)
                throws java.io.IOException

Returns:

The number of bytes written; 0 iff the pipe is full

Throws:

java.io.IOException

isEmpty

public final boolean isEmpty()

Returns:

Whether the next invocation of Pipe.read(byte[], int, int) will return 0

isFull

public final boolean isFull()

Returns:

Whether the next invocation of Pipe.write(byte[], int, int) will return 0