Package org.jboss.shrinkwrap.api.nio.file

Class SeekableInMemoryByteChannel

java.lang.Object

org.jboss.shrinkwrap.api.nio.file.SeekableInMemoryByteChannel

All Implemented Interfaces:

Closeable, AutoCloseable, ByteChannel, Channel, ReadableByteChannel, SeekableByteChannel, WritableByteChannel

public class SeekableInMemoryByteChannel
extends Object
implements SeekableByteChannel

SeekableByteChannel implementation backed by an auto-resizing byte array; thread-safe. Can hold a maxiumum of Integer.MAX_VALUE bytes.

Field Summary

Fields

Modifier and Type	Field	Description
private byte[]	contents	Internal buffer for contents; guarded by "this"
private boolean	open	Whether or not this SeekableByteChannel is open; volatile instead of sync is acceptable because this field participates in no compound computations or invariants with other instance members.
private int	position	Current position; guarded by "this"

Constructor Summary

Constructors

Constructor	Description
SeekableInMemoryByteChannel()	Creates a new instance with 0 size and 0 position, and open.

Method Summary

Modifier and Type	Method	Description
private void	checkClosed()	Throws a ClosedChannelException if this SeekableByteChannel is closed.
void	close()
private byte[]	concat(byte[] input1, byte[] input2, int position)	Creates a new array which is the concatenated result of the two inputs, at the designated position (to be filled with 0x00) in the case of a gap).
(package private) InputStream	getContents()	Obtain a copy of the contents of this Channel as an InputStream
boolean	isOpen()
long	position()
SeekableByteChannel	position(long newPosition)
int	read(ByteBuffer destination)
long	size()
SeekableByteChannel	truncate(long size)
int	write(ByteBuffer source)

Methods inherited from class java.lang.Object

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

Field Details

position

private int position

Current position; guarded by "this"

open

private volatile boolean open

Whether or not this SeekableByteChannel is open; volatile instead of sync is acceptable because this field participates in no compound computations or invariants with other instance members.

contents

private byte[] contents

Internal buffer for contents; guarded by "this"

Constructor Details

SeekableInMemoryByteChannel

public SeekableInMemoryByteChannel()

Creates a new instance with 0 size and 0 position, and open.

Method Details

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

See Also:

• Channel.isOpen()

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Channel

Specified by:

close in interface Closeable

Throws:

IOException

See Also:

• Channel.close()

read

public int read(ByteBuffer destination)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Specified by:

read in interface SeekableByteChannel

Throws:

IOException

See Also:

• SeekableByteChannel.read(java.nio.ByteBuffer)

write

public int write(ByteBuffer source)
          throws IOException

Specified by:

write in interface SeekableByteChannel

Specified by:

write in interface WritableByteChannel

Throws:

IOException

See Also:

• SeekableByteChannel.write(java.nio.ByteBuffer)

concat

private byte[] concat(byte[] input1,
 byte[] input2,
 int position)

Creates a new array which is the concatenated result of the two inputs, at the designated position (to be filled with 0x00) in the case of a gap).

Parameters:

input1 -

input2 -

position -

Returns:

position

public long position()
              throws IOException

Specified by:

position in interface SeekableByteChannel

Throws:

IOException

See Also:

• SeekableByteChannel.position()

position

public SeekableByteChannel position(long newPosition)
                             throws IOException

Specified by:

position in interface SeekableByteChannel

Throws:

IOException

See Also:

• SeekableByteChannel.position(long)

size

public long size()
          throws IOException

Specified by:

size in interface SeekableByteChannel

Throws:

IOException

See Also:

• SeekableByteChannel.size()

truncate

public SeekableByteChannel truncate(long size)
                             throws IOException

Specified by:

truncate in interface SeekableByteChannel

Throws:

IOException

See Also:

• SeekableByteChannel.truncate(long)

getContents

InputStream getContents()

Obtain a copy of the contents of this Channel as an InputStream

Returns:

checkClosed

private void checkClosed()
                  throws ClosedChannelException

Throws a ClosedChannelException if this SeekableByteChannel is closed.

Throws:

ClosedChannelException