org.apache.commons.vfs.cache
Class OnCallRefreshFileObject

java.lang.Object
  org.apache.commons.vfs.impl.DecoratedFileObject
      org.apache.commons.vfs.cache.OnCallRefreshFileObject

All Implemented Interfaces:

FileObject

public class OnCallRefreshFileObject

extends DecoratedFileObject

This decorator refreshes the fileObject data on every call

Version:

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

Author:

Mario Ivankovits

Constructor Summary

OnCallRefreshFileObject(FileObject fileObject)

Method Summary

void	close() Closes this file, and its content.
void	copyFrom(FileObject srcFile, FileSelector selector) Copies another file, and all its descendents, to this file.
void	createFile() Creates this file, if it does not exist.
void	createFolder() Creates this folder, if it does not exist.
boolean	delete() Deletes this file.
int	delete(FileSelector selector) Deletes all descendents of this file that match a selector.
boolean	exists() Determines if this file exists.
FileObject[]	findFiles(FileSelector selector) Finds the set of matching descendents of this file, in depthwise order.
void	findFiles(FileSelector selector, boolean depthwise, List selected) Finds the set of matching descendents of this file.
FileObject	getChild(String name) Returns a child of this file.
FileObject[]	getChildren() Lists the children of this file.
FileContent	getContent() Returns this file's content.
FileType	getType() Returns this file's type.
boolean	isHidden() Determines if this file is hidden.
boolean	isReadable() Determines if this file can be read.
boolean	isWriteable() Determines if this file can be written to.
void	moveTo(FileObject destFile) Move this file.
FileObject	resolveFile(String path) Finds a file, relative to this file.
FileObject	resolveFile(String name, NameScope scope) Finds a file, relative to this file.

Methods inherited from class org.apache.commons.vfs.impl.DecoratedFileObject

canRenameTo, getDecoratedFileObject, getFileOperations, getFileSystem, getName, getParent, getURL, isAttached, isContentOpen, refresh, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

OnCallRefreshFileObject

public OnCallRefreshFileObject(FileObject fileObject)

Method Detail

close

public void close()
           throws FileSystemException

Description copied from interface: FileObject

Closes this file, and its content. This method is a hint to the implementation that it can release any resources associated with the file.

The file object can continue to be used after this method is called.

Specified by:

close in interface FileObject

Overrides:

close in class DecoratedFileObject

Throws:

FileSystemException

copyFrom

public void copyFrom(FileObject srcFile,
                     FileSelector selector)
              throws FileSystemException

Description copied from interface: FileObject

Copies another file, and all its descendents, to this file.

If this file does not exist, it is created. Its parent folder is also created, if necessary. If this file does exist, it is deleted first.

This method is not transactional. If it fails and throws an exception, this file will potentially only be partially copied.

Specified by:

copyFrom in interface FileObject

Overrides:

copyFrom in class DecoratedFileObject

Throws:

FileSystemException

createFile

public void createFile()
                throws FileSystemException

Description copied from interface: FileObject

Creates this file, if it does not exist. Also creates any ancestor folders which do not exist. This method does nothing if the file already exists and is a file.

Specified by:

createFile in interface FileObject

Overrides:

createFile in class DecoratedFileObject

Throws:

FileSystemException

createFolder

public void createFolder()
                  throws FileSystemException

Description copied from interface: FileObject

Creates this folder, if it does not exist. Also creates any ancestor folders which do not exist. This method does nothing if the folder already exists.

Specified by:

createFolder in interface FileObject

Overrides:

createFolder in class DecoratedFileObject

Throws:

FileSystemException

delete

public boolean delete()
               throws FileSystemException

Description copied from interface: FileObject

Deletes this file. Does nothing if this file does not exist of if it is a folder that has children. Does not delete any descendents of this file, use FileObject.delete(FileSelector) for that.

Specified by:

delete in interface FileObject

Overrides:

delete in class DecoratedFileObject

Throws:

FileSystemException

delete

public int delete(FileSelector selector)
           throws FileSystemException

Description copied from interface: FileObject

Deletes all descendents of this file that match a selector. Does nothing if this file does not exist.

This method is not transactional. If it fails and throws an exception, this file will potentially only be partially deleted.

Specified by:

delete in interface FileObject

Overrides:

delete in class DecoratedFileObject

Throws:

FileSystemException

exists

public boolean exists()
               throws FileSystemException

Description copied from interface: FileObject

Determines if this file exists.

Specified by:

exists in interface FileObject

Overrides:

exists in class DecoratedFileObject

Throws:

FileSystemException

findFiles

public void findFiles(FileSelector selector,
                      boolean depthwise,
                      List selected)
               throws FileSystemException

Description copied from interface: FileObject

Finds the set of matching descendents of this file.

Specified by:

findFiles in interface FileObject

Overrides:

findFiles in class DecoratedFileObject

Throws:

FileSystemException

findFiles

public FileObject[] findFiles(FileSelector selector)
                       throws FileSystemException

Description copied from interface: FileObject

Finds the set of matching descendents of this file, in depthwise order.

Specified by:

findFiles in interface FileObject

Overrides:

findFiles in class DecoratedFileObject

Throws:

FileSystemException

getChild

public FileObject getChild(String name)
                    throws FileSystemException

Description copied from interface: FileObject

Returns a child of this file. Note that this method returns null when the child does not exist. This differs from FileObject.resolveFile( String, NameScope) which never returns null.

Specified by:

getChild in interface FileObject

Overrides:

getChild in class DecoratedFileObject

Throws:

FileSystemException

getChildren

public FileObject[] getChildren()
                         throws FileSystemException

Description copied from interface: FileObject

Lists the children of this file.

Specified by:

getChildren in interface FileObject

Overrides:

getChildren in class DecoratedFileObject

Throws:

FileSystemException

getContent

public FileContent getContent()
                       throws FileSystemException

Description copied from interface: FileObject

Returns this file's content. The FileContent returned by this method can be used to read and write the content of the file.

This method can be called if the file does not exist, and the returned FileContent can be used to create the file by writing its content.

Specified by:

getContent in interface FileObject

Overrides:

getContent in class DecoratedFileObject

Throws:

FileSystemException

getType

public FileType getType()
                 throws FileSystemException

Description copied from interface: FileObject

Returns this file's type.

Specified by:

getType in interface FileObject

Overrides:

getType in class DecoratedFileObject

Throws:

FileSystemException

isHidden

public boolean isHidden()
                 throws FileSystemException

Description copied from interface: FileObject

Determines if this file is hidden.

Specified by:

isHidden in interface FileObject

Overrides:

isHidden in class DecoratedFileObject

Throws:

FileSystemException

isReadable

public boolean isReadable()
                   throws FileSystemException

Description copied from interface: FileObject

Determines if this file can be read.

Specified by:

isReadable in interface FileObject

Overrides:

isReadable in class DecoratedFileObject

Throws:

FileSystemException

isWriteable

public boolean isWriteable()
                    throws FileSystemException

Description copied from interface: FileObject

Determines if this file can be written to.

Specified by:

isWriteable in interface FileObject

Overrides:

isWriteable in class DecoratedFileObject

Throws:

FileSystemException

moveTo

public void moveTo(FileObject destFile)
            throws FileSystemException

Description copied from interface: FileObject

Move this file.

If the destFile exists, it is deleted first

Specified by:

moveTo in interface FileObject

Overrides:

moveTo in class DecoratedFileObject

Throws:

FileSystemException

resolveFile

public FileObject resolveFile(String name,
                              NameScope scope)
                       throws FileSystemException

Description copied from interface: FileObject

Finds a file, relative to this file. Refer to NameScope for a description of how names are resolved in the different scopes.

Specified by:

resolveFile in interface FileObject

Overrides:

resolveFile in class DecoratedFileObject

Throws:

FileSystemException

resolveFile

public FileObject resolveFile(String path)
                       throws FileSystemException

Description copied from interface: FileObject

Finds a file, relative to this file. Equivalent to calling resolveFile( path, NameScope.FILE_SYSTEM ).

Specified by:

resolveFile in interface FileObject

Overrides:

resolveFile in class DecoratedFileObject

Throws:

FileSystemException