org.apache.commons.vfs2.provider.ram

Class RamFileSystem

java.lang.Object

org.apache.commons.vfs2.provider.AbstractVfsComponent

org.apache.commons.vfs2.provider.AbstractFileSystem

org.apache.commons.vfs2.provider.ram.RamFileSystem

All Implemented Interfaces:

java.io.Serializable, FileSystem, VfsComponent

public class RamFileSystem
extends AbstractFileSystem
implements java.io.Serializable

A RAM File System.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private static int	BUFFER_SIZE
private java.util.Map<FileName,RamFileData>	cache Cache of RAM File Data
private static long	serialVersionUID serialVersionUID format is YYYYMMDD for the date of the last binary change.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RamFileSystem(FileName rootName, FileSystemOptions fileSystemOptions)

Method Summary

Modifier and Type	Method and Description
protected void	addCapabilities(java.util.Collection<Capability> caps) Adds the capabilities of this file system.
void	attach(RamFileObject fo)
void	close() Close the RAMFileSystem.
protected FileObject	createFile(AbstractFileName name) Creates a file object.
(package private) void	delete(RamFileObject file) Delete a file
void	importTree(java.io.File file) Import a Tree.
(package private) java.lang.String[]	listChildren(FileName name)
(package private) void	rename(RamFileObject from, RamFileObject to)
(package private) void	save(RamFileObject file) Saves a file
(package private) long	size()
(package private) void	toRamFileObject(FileObject fo, FileObject root) Import the given file with the name relative to the given root

Methods inherited from class org.apache.commons.vfs2.provider.AbstractFileSystem

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

Methods inherited from class org.apache.commons.vfs2.provider.AbstractVfsComponent

getContext, getLogger, setContext, setLogger

Methods inherited from class java.lang.Object

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

Field Detail

BUFFER_SIZE

private static final int BUFFER_SIZE

See Also:

Constant Field Values

serialVersionUID

private static final long serialVersionUID

serialVersionUID format is YYYYMMDD for the date of the last binary change.

See Also:

Constant Field Values

cache

private final java.util.Map<FileName,RamFileData> cache

Cache of RAM File Data

Constructor Detail

RamFileSystem

protected RamFileSystem(FileName rootName,
                        FileSystemOptions fileSystemOptions)

Parameters:

rootName - The root file name.

fileSystemOptions - The FileSystem options.

Method Detail

createFile

protected FileObject createFile(AbstractFileName name)
                         throws java.lang.Exception

Description copied from class: AbstractFileSystem

Creates a file object.

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

Specified by:

createFile in class AbstractFileSystem

Parameters:

name - name referencing the new file.

Returns:

new created FileObject.

Throws:

java.lang.Exception - might throw an Exception, which is then wrapped in FileSystemException.

addCapabilities

protected void addCapabilities(java.util.Collection<Capability> caps)

Description copied from class: AbstractFileSystem

Adds the capabilities of this file system.

Specified by:

addCapabilities in class AbstractFileSystem

Parameters:

caps - collections of Capabilities, can be immutable.

listChildren

java.lang.String[] listChildren(FileName name)

Parameters:

name - The name of the file.

Returns:

children The names of the children.

delete

void delete(RamFileObject file)
     throws FileSystemException

Delete a file

Parameters:

file -

Throws:

FileSystemException

save

void save(RamFileObject file)
   throws FileSystemException

Saves a file

Parameters:

file -

Throws:

FileSystemException

rename

void rename(RamFileObject from,
            RamFileObject to)
     throws FileSystemException

Parameters:

from - The original file.

to - The new file.

Throws:

FileSystemException - if an error occurs.

attach

public void attach(RamFileObject fo)

importTree

public void importTree(java.io.File file)
                throws FileSystemException

Import a Tree.

Parameters:

file - The File

Throws:

FileSystemException - if an error occurs.

toRamFileObject

void toRamFileObject(FileObject fo,
                     FileObject root)
              throws FileSystemException

Import the given file with the name relative to the given root

Parameters:

fo -

root -

Throws:

FileSystemException

size

long size()

Returns:

Returns the size of the FileSystem

close

public void close()

Close the RAMFileSystem.

Specified by:

close in interface VfsComponent

Overrides:

close in class AbstractFileSystem