Package jakarta.mail.event

Class MessageCountEvent

java.lang.Object

java.util.EventObject

jakarta.mail.event.MailEvent

jakarta.mail.event.MessageCountEvent

All Implemented Interfaces:

Serializable

public class MessageCountEvent
extends MailEvent

This class notifies changes in the number of messages in a folder.

Note that some folder types may only deliver MessageCountEvents at certain times or after certain operations. IMAP in particular will only notify the client of MessageCountEvents when a client issues a new command. Refer to RFC 3501 for details. A client may want to "poll" the folder by occasionally calling the getMessageCount or isOpen methods to solicit any such notifications.

Author:

John Mani

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ADDED	The messages were added to their folder
protected Message[]	msgs	The messages.
protected boolean	removed	If true, this event is the result of an explicit expunge by this client, and the messages in this folder have been renumbered to account for this.
static final int	REMOVED	The messages were removed from their folder
protected int	type	The event type.

Fields inherited from class java.util.EventObject

source

Constructor Summary

Constructors

Constructor	Description
MessageCountEvent(Folder folder, int type, boolean removed, Message[] msgs)	Constructor.

Method Summary

Modifier and Type	Method	Description
void	dispatch(Object listener)	Invokes the appropriate MessageCountListener method.
Message[]	getMessages()	Return the array of messages added or removed.
int	getType()	Return the type of this event.
boolean	isRemoved()	Indicates whether this event is the result of an explicit expunge by this client, or due to an expunge from external sources.

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 Details

ADDED

public static final int ADDED

The messages were added to their folder

See Also:

• Constant Field Values

REMOVED

public static final int REMOVED

The messages were removed from their folder

See Also:

• Constant Field Values

type

protected int type

The event type.

removed

protected boolean removed

If true, this event is the result of an explicit expunge by this client, and the messages in this folder have been renumbered to account for this. If false, this event is the result of an expunge by external sources.

msgs

protected transient Message[] msgs

The messages.

Constructor Details

MessageCountEvent

public MessageCountEvent(Folder folder,
 int type,
 boolean removed,
 Message[] msgs)

Constructor.

Parameters:

folder - The containing folder

type - The event type

removed - If true, this event is the result of an explicit expunge by this client, and the messages in this folder have been renumbered to account for this. If false, this event is the result of an expunge by external sources.

msgs - The messages added/removed

Method Details

getType

public int getType()

Return the type of this event.

Returns:

type

isRemoved

public boolean isRemoved()

Indicates whether this event is the result of an explicit expunge by this client, or due to an expunge from external sources. If true, this event is due to an explicit expunge and hence all remaining messages in this folder have been renumbered. If false, this event is due to an external expunge.

Note that this method is valid only if the type of this event is REMOVED

Returns:

true if the message has been removed

getMessages

public Message[] getMessages()

Return the array of messages added or removed.

Returns:

array of messages

dispatch

public void dispatch(Object listener)

Invokes the appropriate MessageCountListener method.

Specified by:

dispatch in class MailEvent

Parameters:

listener - the listener to invoke on