程序包 ohos.agp.database

类 Publisher<T>

java.lang.Object

ohos.agp.database.Publisher<T>

类型参数:

T - Indicates the publisher type.

直接已知子类:

DataSetPublisher, PageSliderIndicator.IndicatorSelectionHandler

public abstract class Publisher<T>
extends Object

An abstract class used to register and deregister a subscriber.

This class provides a list of subscribers as well as three abstract interfaces for registering a subscriber, deregister a subscriber, and deregister all subscribers. You can call the child interfaces of the three abstract interfaces to manage subscriber registrations.

从以下版本开始:

3

字段概要

字段

限定符和类型	字段	说明
protected List<T>	mSubscribers	Indicates the subscriber list variable.

构造器概要

构造器

构造器	说明
Publisher()

方法概要

限定符和类型	方法	说明
void	registerSubscriber(T subscriber)	Registers subscribers with the subscriber list.
void	unregisterSubscriber(long subscriber)	Removes a subscriber from the subscriber list.
void	unregisterSubscriber(T subscriber)	Removes an subscriber from the subscriber list.

从类继承的方法 java.lang.Object

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

字段详细资料

mSubscribers

protected final List<T> mSubscribers

Indicates the subscriber list variable.

This variable is used to store registered subscribers for unified management. Its type is List, and its size is determined by Java implementation.

构造器详细资料

Publisher

public Publisher()

方法详细资料

registerSubscriber

public void registerSubscriber(T subscriber)

Registers subscribers with the subscriber list.

This method is used to register multiple subscribers of the same type so that the subscribers' interfaces can be called in an uniform manner to handle changes on observed objects.

参数:

subscriber - Indicates the subscriber variable.

unregisterSubscriber

public void unregisterSubscriber(T subscriber)

Removes an subscriber from the subscriber list.

This method is used to deregister an subscriber by removing it from the subscriber list. A deregistered subscriber cannot perceive changes made for its observed objects.

参数:

subscriber - Indicates the subscriber variable.

unregisterSubscriber

public void unregisterSubscriber(long subscriber)

Removes a subscriber from the subscriber list.

This method is used to deregister a subscriber by removing it from the subscriber list. A deregistered subscriber cannot perceive changes made for its observed objects.

参数:

subscriber - Indicates the subscriber native pointer.

从以下版本开始:

3