Package org.apache.commons.vfs.impl

Class VirtualFileSystem

java.lang.Object

org.apache.commons.vfs.provider.AbstractVfsComponent

org.apache.commons.vfs.provider.AbstractFileSystem

org.apache.commons.vfs.impl.VirtualFileSystem

All Implemented Interfaces:

FileSystem, VfsComponent

public class VirtualFileSystem
extends AbstractFileSystem

A logical file system, made up of set of junctions, or links, to files from other file systems.

Version:

$Revision: 480428 $ $Date: 2006-11-29 07:15:24 +0100 (Wed, 29 Nov 2006) $

Author:

Adam Murdoch

Constructor Summary

Constructors

Constructor	Description
VirtualFileSystem(FileName rootName, FileSystemOptions fileSystemOptions)

Method Summary

Modifier and Type	Method	Description
protected void	addCapabilities(Collection caps)	Adds the capabilities of this file system.
void	addJunction(String junctionPoint, FileObject targetFile)	Adds a junction to this file system.
protected FileObject	createFile(FileName name)	Creates a file object.
void	removeJunction(String junctionPoint)	Removes a junction from this file system.

Methods inherited from class org.apache.commons.vfs.provider.AbstractFileSystem

addListener, close, closeCommunicationLink, decorateFileObject, doCloseCommunicationLink, doReplicateFile, fireFileChanged, fireFileCreated, fireFileDeleted, getAttribute, getFileFromCache, getFileSystemManager, getFileSystemOptions, getLastModTimeAccuracy, getParentLayer, getRoot, getRootName, hasCapability, init, isOpen, isReleaseable, notifyAllStreamsClosed, putFileToCache, removeFileFromCache, removeListener, replicateFile, resolveFile, resolveFile, setAttribute

Methods inherited from class org.apache.commons.vfs.provider.AbstractVfsComponent

getContext, getLogger, setContext, setLogger

Methods inherited from class java.lang.Object

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

Constructor Details

VirtualFileSystem

public VirtualFileSystem(FileName rootName,
 FileSystemOptions fileSystemOptions)

Method Details

addCapabilities

protected void addCapabilities(Collection caps)

Adds the capabilities of this file system.

Specified by:

addCapabilities in class AbstractFileSystem

createFile

protected FileObject createFile(FileName name)
                         throws Exception

Creates a file object. This method is called only if the requested file is not cached.

Specified by:

createFile in class AbstractFileSystem

Throws:

Exception

addJunction

public void addJunction(String junctionPoint,
 FileObject targetFile)
                 throws FileSystemException

Adds a junction to this file system.

Specified by:

addJunction in interface FileSystem

Overrides:

addJunction in class AbstractFileSystem

Parameters:

junctionPoint - The point in this file system to add the junction.

targetFile - The file to link to.

Throws:

FileSystemException - If this file system does not support junctions, or the junction point or target file is invalid (the file system may not support nested junctions, for example).

removeJunction

public void removeJunction(String junctionPoint)
                    throws FileSystemException

Removes a junction from this file system.

Specified by:

removeJunction in interface FileSystem

Overrides:

removeJunction in class AbstractFileSystem

Parameters:

junctionPoint - The junction to remove.

Throws:

FileSystemException - On error removing the junction.