dk.apaq.vfs.impl.layered
Class LayeredFileSystem

java.lang.Object
  dk.apaq.vfs.impl.layered.LayeredFileSystem

All Implemented Interfaces:

FileSystem, Serializable

public class LayeredFileSystem
extends Object
implements FileSystem

Author:

michael

See Also:

Serialized Form

Field Summary

Fields inherited from interface dk.apaq.vfs.FileSystem

FSInfo_Description, FSInfo_HasFreeSpaceInformation, FSInfo_HasSizeInformation, FSInfo_Name, FSInfo_Version

Constructor Summary

LayeredFileSystem(FileSystem layerForFilesystem)

Method Summary

void	addLayer(Path injectPath, Directory directory)
void	close()
long	getFreeSpace() Retrieves the free space available.
Map	getInfo() Retrieves a list of information about the filesystem.
protected List<Directory>	getLayers(Path path)
String	getName() Retrieves the name of the filesystem.
Node	getNode(String path)
Directory	getRoot() Retrieves the root directory of the filesystem.
long	getSize() Retrieves the size of the filesystem in bytes.

Methods inherited from class java.lang.Object

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

Constructor Detail

LayeredFileSystem

public LayeredFileSystem(FileSystem layerForFilesystem)

Method Detail

addLayer

public void addLayer(Path injectPath,
                     Directory directory)

getLayers

protected List<Directory> getLayers(Path path)

getName

public String getName()

Description copied from interface: FileSystem

Retrieves the name of the filesystem.

Specified by:

getName in interface FileSystem

Returns:

The name.

getInfo

public Map getInfo()

Description copied from interface: FileSystem

Retrieves a list of information about the filesystem.

Specified by:

getInfo in interface FileSystem

Returns:

A map hold key/pair information about the filesystem. Default keys are available as static variables on the FileSystem interface.

getRoot

public Directory getRoot()
                  throws FileNotFoundException

Description copied from interface: FileSystem

Retrieves the root directory of the filesystem.

Specified by:

getRoot in interface FileSystem

Returns:

The root directory.

Throws:

FileNotFoundException - Thrown if the root directory could not be found.

getSize

public long getSize()

Description copied from interface: FileSystem

Retrieves the size of the filesystem in bytes.

Specified by:

getSize in interface FileSystem

Returns:

The size of the filesystem or -1 if not supported. The filesystem should report if it supports this call via the infomap retrieveable by getInfo(). The key to use for retrieveal is FSInfo_HasSizeInformation

getFreeSpace

public long getFreeSpace()

Description copied from interface: FileSystem

Retrieves the free space available.

Specified by:

getFreeSpace in interface FileSystem

Returns:

The free space avaliable in bytes or -1 if not supported. The filesystem should report if it supports this call via the infomap retrieveable by getInfo(). The key to use for retrieveal is FSInfo_HasFreeSpaceInformation.

getNode

public Node getNode(String path)
             throws FileNotFoundException

Specified by:

getNode in interface FileSystem

Throws:

FileNotFoundException

close

public void close()
           throws IOException

Specified by:

close in interface FileSystem

Throws:

IOException