com.db4o.io

Class IoAdapter

java.lang.Object

com.db4o.io.IoAdapter

Direct Known Subclasses:

CachedIoAdapter, NIOFileAdapter, RandomAccessFileAdapter, VanillaIoAdapter, Win32IoAdapter

Deprecated.

Use classes that implement Storage instead. The new functionality has been split: Storage is the factory class to open Bin adapters. Bin is the actual implementation of IO access.

public abstract class IoAdapter
extends java.lang.Object

Base class for database file adapters, both for file and memory databases.

Constructor Summary

Constructors

Constructor and Description
IoAdapter() Deprecated.

Method Summary

Methods

Modifier and Type	Method and Description
void	blockCopy(int oldAddress, int oldAddressOffset, int newAddress, int newAddressOffset, int length) Deprecated. copies a block within a file in block mode
void	blockSeek(int address) Deprecated. sets the read/write pointer in the file using block mode
void	blockSeek(int address, int offset) Deprecated. sets the read/write pointer in the file using block mode
int	blockSize() Deprecated. returns the block size currently used
void	blockSize(int blockSize) Deprecated. outside call to set the block size of this adapter
abstract void	close() Deprecated. implement to close the adapter
void	copy(long oldAddress, long newAddress, int length) Deprecated. copies a block within a file in absolute mode
IoAdapter	delegatedIoAdapter() Deprecated. Delegated IO Adapter
abstract void	delete(java.lang.String path) Deprecated. deletes the given path from whatever 'file system' is addressed
abstract boolean	exists(java.lang.String path) Deprecated. checks whether a file exists
abstract long	getLength() Deprecated. implement to return the absolute length of the file
abstract IoAdapter	open(java.lang.String path, boolean lockFile, long initialLength, boolean readOnly) Deprecated. implement to open the file
int	read(byte[] buffer) Deprecated. reads a buffer at the seeked address
abstract int	read(byte[] bytes, int length) Deprecated. implement to read a buffer at the seeked address
protected long	regularAddress(int blockAddress, int blockAddressOffset) Deprecated. converts address and address offset to an absolute address
abstract void	seek(long pos) Deprecated. implement to set the read/write pointer in the file, absolute mode
abstract void	sync() Deprecated. implement to flush the file contents to storage
void	write(byte[] bytes) Deprecated. writes a buffer to the seeked address
abstract void	write(byte[] buffer, int length) Deprecated. implement to write a buffer at the seeked address

Methods inherited from class java.lang.Object

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

Constructor Detail

IoAdapter

public IoAdapter()

Deprecated.

Method Detail

regularAddress

protected final long regularAddress(int blockAddress,
                  int blockAddressOffset)

Deprecated.

converts address and address offset to an absolute address

blockCopy

public void blockCopy(int oldAddress,
             int oldAddressOffset,
             int newAddress,
             int newAddressOffset,
             int length)
               throws Db4oIOException

Deprecated.

copies a block within a file in block mode

Throws:

Db4oIOException

blockSeek

public void blockSeek(int address)
               throws Db4oIOException

Deprecated.

sets the read/write pointer in the file using block mode

Throws:

Db4oIOException

blockSeek

public void blockSeek(int address,
             int offset)
               throws Db4oIOException

Deprecated.

sets the read/write pointer in the file using block mode

Throws:

Db4oIOException

blockSize

public void blockSize(int blockSize)

Deprecated.

outside call to set the block size of this adapter

close

public abstract void close()
                    throws Db4oIOException

Deprecated.

implement to close the adapter

Throws:

Db4oIOException

copy

public void copy(long oldAddress,
        long newAddress,
        int length)
          throws Db4oIOException

Deprecated.

copies a block within a file in absolute mode

Throws:

Db4oIOException

delete

public abstract void delete(java.lang.String path)

Deprecated.

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

exists

public abstract boolean exists(java.lang.String path)

Deprecated.

checks whether a file exists

getLength

public abstract long getLength()
                        throws Db4oIOException

Deprecated.

implement to return the absolute length of the file

Throws:

Db4oIOException

open

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

Deprecated.

implement to open the file

Throws:

Db4oIOException

read

public int read(byte[] buffer)
         throws Db4oIOException

Deprecated.

reads a buffer at the seeked address

Returns:

the number of bytes read and returned

Throws:

Db4oIOException

read

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

Deprecated.

implement to read a buffer at the seeked address

Throws:

Db4oIOException

seek

public abstract void seek(long pos)
                   throws Db4oIOException

Deprecated.

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

Throws:

Db4oIOException

sync

public abstract void sync()
                   throws Db4oIOException

Deprecated.

implement to flush the file contents to storage

Throws:

Db4oIOException

write

public void write(byte[] bytes)
           throws Db4oIOException

Deprecated.

writes a buffer to the seeked address

Throws:

Db4oIOException

write

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

Deprecated.

implement to write a buffer at the seeked address

Throws:

Db4oIOException

blockSize

public int blockSize()

Deprecated.

returns the block size currently used

delegatedIoAdapter

public IoAdapter delegatedIoAdapter()

Deprecated.

Delegated IO Adapter

Returns:

reference to itself