FolderEvent (JavaMail API documentation)
Date: 2019-08-31

javax.mail.event

## Class FolderEvent

- java.lang.Object
- - java.util.EventObject
  - - javax.mail.event.MailEvent
    - - javax.mail.event.FolderEvent

- All Implemented Interfaces:
    java.io.Serializable

      public class FolderEvent
      extends MailEvent

  This class models Folder existence events. FolderEvents are delivered to FolderListeners registered on the affected Folder as well as the containing Store.

  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).

  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static int` | `CREATED` The folder was created.
    `static int` | `DELETED` The folder was deleted.
    `protected Folder` | `folder` The folder the event occurred on.
    `protected Folder` | `newFolder` The folder that represents the new name, in case of a RENAMED event.
    `static int` | `RENAMED` The folder was renamed.
    `protected int` | `type` The event type.

    - ### Fields inherited from class java.util.EventObject

      `source`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `FolderEvent(java.lang.Object source, Folder oldFolder, Folder newFolder, int type)` Constructor.
    `FolderEvent(java.lang.Object source, Folder folder, int type)` Constructor.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `dispatch(java.lang.Object listener)` Invokes the appropriate FolderListener method
    `Folder` | `getFolder()` Return the affected folder.
    `Folder` | `getNewFolder()` 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.
    `int` | `getType()` Return the type of this event.

    - ### Methods inherited from class java.util.EventObject

      `getSource, toString`

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### CREATED

          public static final int CREATED

      The folder was created.
      See Also:
        Constant Field Values

    - #### DELETED

          public static final int DELETED

      The folder was deleted.
      See Also:
        Constant Field Values

    - #### RENAMED

          public static final int RENAMED

      The folder was renamed.
      See Also:
        Constant Field Values

    - #### type

          protected int type

      The event type.

    - #### folder

          protected transient Folder folder

      The folder the event occurred on.

    - #### newFolder

          protected transient Folder newFolder

      The folder that represents the new name, in case of a RENAMED event.
      Since:
        JavaMail 1.1

  - ### Constructor Detail

    - #### FolderEvent

          public FolderEvent(java.lang.Object source,
                             Folder folder,
                             int type)

      Constructor.

      Parameters:
        `source` - The source of the event
        `folder` - The affected folder
        `type` - The event type

    - #### FolderEvent

          public FolderEvent(java.lang.Object source,
                             Folder oldFolder,
                             Folder newFolder,
                             int type)

      Constructor. Use for RENAMED events.
      Parameters:
        `source` - The source of the event
        `oldFolder` - The folder that is renamed
        `newFolder` - The folder that represents the new name
        `type` - The event type
      Since:
        JavaMail 1.1

  - ### Method Detail

    - #### getType

          public int getType()

      Return the type of this event.
      Returns:
        type

    - #### getFolder

          public Folder getFolder()

      Return the affected folder.
      Returns:
        the affected folder
      See Also:
        `getNewFolder()`

    - #### getNewFolder

          public Folder getNewFolder()

      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.

      The `getFolder()` method returns the folder that is renamed.

      Returns:
        Folder representing the new name.
      Since:
        JavaMail 1.1
      See Also:
        `getFolder()`

    - #### dispatch

          public void dispatch(java.lang.Object listener)

      Invokes the appropriate FolderListener method
      Specified by:
        `dispatch` in class `MailEvent`

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