public class WeakRefFileListener extends Object implements FileListener
Modifier | Constructor and Description |
---|---|
protected |
WeakRefFileListener(FileObject file,
FileListener listener)
Constructs a new instance.
|
Modifier and Type | Method and Description |
---|---|
void |
fileChanged(FileChangeEvent event)
Called when a file is changed.
|
void |
fileCreated(FileChangeEvent event)
Called when a file is created.
|
void |
fileDeleted(FileChangeEvent event)
Called when a file is deleted.
|
protected FileListener |
getListener()
Gets the wrapped listener.
|
static void |
installListener(FileObject file,
FileListener listener)
Install the
listener at the given file . |
protected WeakRefFileListener(FileObject file, FileListener listener)
file
- the file object.listener
- the file listener.public static void installListener(FileObject file, FileListener listener)
listener
at the given file
.
This installs a wrapper with a weak reference, so the listener can be collected. The reference to the listener is removed when the first event can't be delivered.
Warning: you cannot remove the listener with
fs.removeListener(file, listener)
as you do'nt have the wrapper
instance at hand.
Method is used by DelegateFileObject
,
as used for VirtualFileSystem
.
file
- The FileObject to listen on.listener
- The FileListenerpublic void fileChanged(FileChangeEvent event) throws Exception
This will only happen if you monitor the file using FileMonitor
.
fileChanged
in interface FileListener
event
- The FileChangeEvent.Exception
- if an error occurs.public void fileCreated(FileChangeEvent event) throws Exception
fileCreated
in interface FileListener
event
- The FileChangeEvent.Exception
- if an error occurs.public void fileDeleted(FileChangeEvent event) throws Exception
fileDeleted
in interface FileListener
event
- The FileChangeEvent.Exception
- if an error occurs.protected FileListener getListener() throws Exception
Exception
- if an error occurs.Copyright © 2002–2025 The Apache Software Foundation. All rights reserved.