com.db4o.util.io

Class NIOFileAdapter

java.lang.Object

com.db4o.io.IoAdapter

com.db4o.util.io.NIOFileAdapter

public class NIOFileAdapter
extends IoAdapter

Constructor Summary

Constructors

Constructor and Description
NIOFileAdapter(int pageSize, int lruLimit)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() implement to close the adapter
void	delete(java.lang.String path) deletes the given path from whatever 'file system' is addressed
boolean	exists(java.lang.String path) checks whether a file exists
long	getLength() implement to return the absolute length of the file
void	lock()
IoAdapter	open(java.lang.String path, boolean lockFile, long initialLength, boolean readOnly) implement to open the file
int	read(byte[] bytes, int length) implement to read a buffer at the seeked address
void	seek(long position) implement to set the read/write pointer in the file, absolute mode
void	sync() implement to flush the file contents to storage
void	unlock()
void	write(byte[] bytes, int length) implement to write a buffer at the seeked address

Methods inherited from class com.db4o.io.IoAdapter

blockCopy, blockSeek, blockSeek, blockSize, blockSize, copy, delegatedIoAdapter, read, regularAddress, write

Methods inherited from class java.lang.Object

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

Constructor Detail

NIOFileAdapter

public NIOFileAdapter(int pageSize,
              int lruLimit)

Method Detail

seek

public void seek(long position)
          throws Db4oIOException

Description copied from class: IoAdapter

implement to set the read/write pointer in the file, absolute mode

Specified by:

seek in class IoAdapter

Throws:

Db4oIOException

close

public void close()
           throws Db4oIOException

Description copied from class: IoAdapter

implement to close the adapter

Specified by:

close in class IoAdapter

Throws:

Db4oIOException

delete

public void delete(java.lang.String path)

Description copied from class: IoAdapter

deletes the given path from whatever 'file system' is addressed

Specified by:

delete in class IoAdapter

exists

public boolean exists(java.lang.String path)

Description copied from class: IoAdapter

checks whether a file exists

Specified by:

exists in class IoAdapter

getLength

public long getLength()
               throws Db4oIOException

Description copied from class: IoAdapter

implement to return the absolute length of the file

Specified by:

getLength in class IoAdapter

Throws:

Db4oIOException

read

public int read(byte[] bytes,
       int length)
         throws Db4oIOException

Description copied from class: IoAdapter

implement to read a buffer at the seeked address

Specified by:

read in class IoAdapter

Throws:

Db4oIOException

write

public void write(byte[] bytes,
         int length)
           throws Db4oIOException

Description copied from class: IoAdapter

implement to write a buffer at the seeked address

Specified by:

write in class IoAdapter

Throws:

Db4oIOException

sync

public void sync()
          throws Db4oIOException

Description copied from class: IoAdapter

implement to flush the file contents to storage

Specified by:

sync in class IoAdapter

Throws:

Db4oIOException

unlock

public void unlock()

lock

public void lock()

open

public IoAdapter open(java.lang.String path,
             boolean lockFile,
             long initialLength,
             boolean readOnly)
               throws Db4oIOException

Description copied from class: IoAdapter

implement to open the file

Specified by:

open in class IoAdapter

Throws:

Db4oIOException