Class MemoryCache

java.lang.Object

com.twelvemonkeys.imageio.stream.MemoryCache

All Implemented Interfaces:

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

final class MemoryCache
extends Object
implements Cache

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final int	BLOCK_SIZE
private final List<byte[]>	cache
private final ReadableByteChannel	channel
private long	length
private int	maxBlock
private static final byte[]	NULL_BLOCK
private long	position
private long	start

Constructor Summary

Constructors

Constructor	Description
MemoryCache(InputStream stream)
MemoryCache(ReadableByteChannel channel)

Method Summary

Modifier and Type	Method	Description
void	close()
(package private) byte[]	fetchBlock()
void	flushBefore(long pos)
boolean	isOpen()
long	position()
SeekableByteChannel	position(long newPosition)
int	read(ByteBuffer dest)
private int	readBlock(byte[] block)
long	size()
SeekableByteChannel	truncate(long size)
int	write(ByteBuffer src)

Methods inherited from class Object

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

Field Details

BLOCK_SIZE

static final int BLOCK_SIZE

See Also:

• Constant Field Values

NULL_BLOCK

private static final byte[] NULL_BLOCK

cache

private final List<byte[]> cache

channel

private final ReadableByteChannel channel

maxBlock

private int maxBlock

length

private long length

position

private long position

start

private long start

Constructor Details

MemoryCache

MemoryCache(InputStream stream)

MemoryCache

public MemoryCache(ReadableByteChannel channel)

Method Details

fetchBlock

byte[] fetchBlock()
           throws IOException

Throws:

IOException

readBlock

private int readBlock(byte[] block)
               throws IOException

Throws:

IOException

isOpen

public boolean isOpen()

Specified by:

isOpen in interface Channel

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

read

public int read(ByteBuffer dest)
         throws IOException

Specified by:

read in interface ReadableByteChannel

Specified by:

read in interface SeekableByteChannel

Throws:

IOException

position

public long position()
              throws IOException

Specified by:

position in interface SeekableByteChannel

Throws:

IOException

position

public SeekableByteChannel position(long newPosition)
                             throws IOException

Specified by:

position in interface SeekableByteChannel

Throws:

IOException

size

public long size()
          throws IOException

Specified by:

size in interface SeekableByteChannel

Throws:

IOException

write

public int write(ByteBuffer src)

Specified by:

write in interface SeekableByteChannel

Specified by:

write in interface WritableByteChannel

truncate

public SeekableByteChannel truncate(long size)

Specified by:

truncate in interface SeekableByteChannel

flushBefore

public void flushBefore(long pos)

Specified by:

flushBefore in interface Cache