Message.RecipientType (Java EE 5)

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javax.mail Class Message.RecipientType

java.lang.Object
  javax.mail.Message.RecipientType

All Implemented Interfaces:: Serializable

Direct Known Subclasses:: MimeMessage.RecipientType

Enclosing class:: Message

public static class Message.RecipientType
extends Object
implements Serializable

Implements: java.io.Serializable

Contained within: Message

Extended by: MimeMessage.RecipientType

此内部类定义了 Message 类所允许的接收方类型。目前已定义的类型有 TO、CC 和 BCC。注意，此类只有一个受保护的构造方法，因此新的 Recipient 类型被限制为此类或其子类。这有效实现了所允许 Recipient 类型的枚举。以下代码示例显示了如何使用此类从消息中获取 "TO" 接收方。

Message msg = folder.getMessages(1);
Address[] a = m.getRecipients(Message.RecipientType.TO);

英文文档：

This inner class defines the types of recipients allowed by the Message class. The currently defined types are TO, CC and BCC. Note that this class only has a protected constructor, thereby restricting new Recipient types to either this class or subclasses. This effectively implements an enumeration of the allowed Recipient types. The following code sample shows how to use this class to obtain the "TO" recipients from a message.

 Message msg = folder.getMessages(1);
 Address[] a = m.getRecipients(Message.RecipientType.TO);

See Also:: Message.getRecipients(javax.mail.Message.RecipientType), Message.setRecipients(javax.mail.Message.RecipientType, javax.mail.Address[]), Message.addRecipients(javax.mail.Message.RecipientType, javax.mail.Address[]), Serialized Form

Field Summary
`static Message.RecipientType`	`BCC` The "Bcc" (blind carbon copy) recipients.
`static Message.RecipientType`	`CC` The "Cc" (carbon copy) recipients.
`static Message.RecipientType`	`TO` The "To" (primary) recipients.
`protected String`	`type` The type of recipient, usually the name of a corresponding Internet standard header.

Constructor Summary
`protected`	`Message.RecipientType(String type)` Constructor for use by subclasses.

Method Summary
`protected Object`	`readResolve()` When deserializing a RecipientType, we need to make sure to return only one of the known static final instances defined in this class.
`String`	`toString()`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Field Detail

英文文档：

public static final Message.RecipientType TO

The "To" (primary) recipients.

英文文档：

public static final Message.RecipientType CC

The "Cc" (carbon copy) recipients.

英文文档：

BCC

public static final Message.RecipientType BCC

The "Bcc" (blind carbon copy) recipients.

英文文档：

type

protected String type

The type of recipient, usually the name of a corresponding Internet standard header.

Constructor Detail

protected Message.RecipientType(String type)
子类使用的构造方法。

英文文档：
Message.RecipientType

protected Message.RecipientType(String type)

Constructor for use by subclasses.

Method Detail

protected Object readResolve() throws java.io.ObjectStreamException
反序列化 RecipientType 时，我们需要确保仅返回此类中定义的已知静态最终实例之一。子类必须实现自己的 `readResolve` 方法，以便在调用此超类方法前检查已知的实例。

英文文档：
readResolve

protected Object readResolve()
                      throws ObjectStreamException

When deserializing a RecipientType, we need to make sure to return only one of the known static final instances defined in this class. Subclasses must implement their own readResolve method that checks for their known instances before calling this super method.