NullFilesCache

java.lang.Object
- org.apache.commons.vfs.provider.AbstractVfsComponent
- - org.apache.commons.vfs.cache.AbstractFilesCache
  - - org.apache.commons.vfs.cache.NullFilesCache

All Implemented Interfaces:

FilesCache, VfsComponent
```
public class NullFilesCache
extends AbstractFilesCache
```
A FilesCache implementation.
This implementation never ever caches a single file.

Notice: if you use resolveFile(uri) multiple times with the same path, the system will always create a new instance. Changes on one instance of this file are not seen by the others.

Version:

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

Author:

Mario Ivankovits

Constructor Summary

Constructors
Constructor Description

NullFilesCache()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`clear(FileSystem filesystem)`	purge the entries corresponding to the filesystem
`void`	`close()`	Closes the provider.
`FileObject`	`getFile(FileSystem filesystem, FileName name)`	retrieve a file from the cache by its name
`void`	`putFile(FileObject file)`	add a fileobject to the cache
`void`	`removeFile(FileSystem filesystem, FileName name)`	removes a file from cache
`void`	`touchFile(FileObject file)`

Methods inherited from class org.apache.commons.vfs.provider.AbstractVfsComponent
getContext, getLogger, init, setContext, setLogger

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NullFilesCache
```
public NullFilesCache()
```
- Method Detail
  - putFile
```
public void putFile(FileObject file)
```
    Description copied from interface: FilesCache
    
    add a fileobject to the cache
    
    Parameters:
    
    file - the file
  - getFile
```
public FileObject getFile(FileSystem filesystem,
                          FileName name)
```
    Description copied from interface: FilesCache
    
    retrieve a file from the cache by its name
    
    name - the name
    
    Returns:
    
    the fileobject or null if file is not cached
  - clear
```
public void clear(FileSystem filesystem)
```
    Description copied from interface: FilesCache
    
    purge the entries corresponding to the filesystem
  - close
```
public void close()
```
    Description copied from class: AbstractVfsComponent
    
    Closes the provider. This implementation does nothing.
    
    Specified by:
    
    close in interface FilesCache
    
    Specified by:
    
    close in interface VfsComponent
    
    Overrides:
    
    close in class AbstractVfsComponent
  - removeFile
```
public void removeFile(FileSystem filesystem,
                       FileName name)
```
    Description copied from interface: FilesCache
    
    removes a file from cache
    
    Parameters:
    
    filesystem - filesystem
    
    name - filename
  - touchFile
```
public void touchFile(FileObject file)
```