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package javax.mail.event;
import javax.mail.Folder;
/**
* This class models Folder <em>existence</em> events. FolderEvents are
* delivered to FolderListeners registered on the affected Folder as
* well as the containing Store. <p>
*
* Service providers vary widely in their ability to notify clients of
* these events. At a minimum, service providers must notify listeners
* registered on the same Store or Folder object on which the operation
* occurs. Service providers may also notify listeners when changes
* are made through operations on other objects in the same virtual
* machine, or by other clients in the same or other hosts. Such
* notifications are not required and are typically not supported
* by mail protocols (including IMAP).
*
* @author John Mani
* @author Bill Shannon
*/
public class FolderEvent extends MailEvent {
/** The folder was created. */
public static final int CREATED = 1;
/** The folder was deleted. */
public static final int DELETED = 2;
/** The folder was renamed. */
public static final int RENAMED = 3;
/**
* The event type.
*
* @serial
*/
protected int type;
/**
* The folder the event occurred on.
*/
transient protected Folder folder;
/**
* The folder that represents the new name, in case of a RENAMED event.
*
* @since JavaMail 1.1
*/
transient protected Folder newFolder;
private static final long serialVersionUID = 5278131310563694307L;
/**
* Constructor. <p>
*
* @param source The source of the event
* @param folder The affected folder
* @param type The event type
*/
public FolderEvent(Object source, Folder folder, int type) {
this(source, folder, folder, type);
}
/**
* Constructor. Use for RENAMED events.
*
* @param source The source of the event
* @param oldFolder The folder that is renamed
* @param newFolder The folder that represents the new name
* @param type The event type
* @since JavaMail 1.1
*/
public FolderEvent(Object source, Folder oldFolder,
Folder newFolder, int type) {
super(source);
this.folder = oldFolder;
this.newFolder = newFolder;
this.type = type;
}
/**
* Return the type of this event.
*
* @return type
*/
public int getType() {
return type;
}
/**
* Return the affected folder.
*
* @return the affected folder
* @see #getNewFolder
*/
public Folder getFolder() {
return folder;
}
/**
* If this event indicates that a folder is renamed, (i.e, the event type
* is RENAMED), then this method returns the Folder object representing the
* new name. <p>
*
* The <code>getFolder()</code> method returns the folder that is renamed.
*
* @return Folder representing the new name.
* @see #getFolder
* @since JavaMail 1.1
*/
public Folder getNewFolder() {
return newFolder;
}
/**
* Invokes the appropriate FolderListener method
*/
public void dispatch(Object listener) {
if (type == CREATED)
((FolderListener)listener).folderCreated(this);
else if (type == DELETED)
((FolderListener)listener).folderDeleted(this);
else if (type == RENAMED)
((FolderListener)listener).folderRenamed(this);
}
}