javax.mail.event
类 MessageCountEvent

java.lang.Object
  java.util.EventObject
      javax.mail.event.MailEvent
          javax.mail.event.MessageCountEvent

所有已实现的接口：

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 2060 http://www.ietf.org/rfc/rfc2060.txt for details. A client may want "poll" the folder by occasionally calling the getMessageCount or isConnected methods to solicit any such notifications.

作者：

John Mani

另请参见：

序列化表格

字段摘要

static 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 int	REMOVED The messages were removed from their folder
protected int	type The event type.

从类 java.util.EventObject 继承的字段

source

构造方法摘要

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

方法摘要

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.

从类 java.util.EventObject 继承的方法

getSource, toString

从类 java.lang.Object 继承的方法

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

字段详细信息

ADDED

public static final int ADDED

The messages were added to their folder

另请参见：

常量字段值

REMOVED

public static final int REMOVED

The messages were removed from their folder

另请参见：

常量字段值

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.

构造方法详细信息

MessageCountEvent

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

Constructor.

参数：

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

方法详细信息

getType

public int getType()

Return the type of this event.

返回：

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

getMessages

public Message[] getMessages()

Return the array of messages added or removed.

返回：

array of messages

dispatch

public void dispatch(Object listener)

Invokes the appropriate MessageCountListener method.

指定者：

类 MailEvent 中的 dispatch