Class FileMem

java.lang.Object

java.nio.channels.spi.AbstractInterruptibleChannel

java.nio.channels.FileChannel

org.h2.store.fs.FileBase

org.h2.store.fs.FileBaseDefault

org.h2.store.fs.mem.FileMem

All Implemented Interfaces:

Closeable, AutoCloseable, ByteChannel, Channel, GatheringByteChannel, InterruptibleChannel, ReadableByteChannel, ScatteringByteChannel, SeekableByteChannel, WritableByteChannel

class FileMem
extends FileBaseDefault

This class represents an in-memory file.

Nested Class Summary

Nested classes/interfaces inherited from class FileChannel

FileChannel.MapMode

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	closed
(package private) final FileMemData	data	The file data.
private final boolean	readOnly

Constructor Summary

Constructors

Constructor	Description
FileMem(FileMemData data, boolean readOnly)

Method Summary

Modifier and Type	Method	Description
void	force(boolean metaData)
void	implCloseChannel()
protected void	implTruncate(long newLength)	The truncate implementation.
int	read(ByteBuffer dst, long position)
long	size()
String	toString()
FileLock	tryLock(long position, long size, boolean shared)
int	write(ByteBuffer src, long position)

Methods inherited from class FileBaseDefault

position, position, read, truncate, write

Methods inherited from class FileBase

lock, map, read, transferFrom, transferTo, write

Methods inherited from class FileChannel

lock, map, open, open, read, tryLock, write

Methods inherited from class AbstractInterruptibleChannel

begin, close, end, isOpen

Methods inherited from class Object

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

Methods inherited from interface Channel

isOpen

Field Details

data

final FileMemData data

The file data.

readOnly

private final boolean readOnly

closed

private volatile boolean closed

Constructor Details

FileMem

FileMem(FileMemData data,
 boolean readOnly)

Method Details

size

public long size()

Specified by:

size in interface SeekableByteChannel

Specified by:

size in class FileChannel

implTruncate

protected void implTruncate(long newLength)
                     throws IOException

Description copied from class: FileBaseDefault

The truncate implementation.

Specified by:

implTruncate in class FileBaseDefault

Parameters:

newLength - the new size

Throws:

IOException - on failure

write

public int write(ByteBuffer src,
 long position)
          throws IOException

Overrides:

write in class FileBase

Throws:

IOException

read

public int read(ByteBuffer dst,
 long position)
         throws IOException

Overrides:

read in class FileBase

Throws:

IOException

implCloseChannel

public void implCloseChannel()
                      throws IOException

Overrides:

implCloseChannel in class FileBase

Throws:

IOException

force

public void force(boolean metaData)
           throws IOException

Overrides:

force in class FileBase

Throws:

IOException

tryLock

public FileLock tryLock(long position,
 long size,
 boolean shared)
                 throws IOException

Overrides:

tryLock in class FileBase

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object