Package org.qiunet.utils.async

Class LazyLoader<T>

java.lang.Object

org.qiunet.utils.async.LazyLoader<T>

public class LazyLoader<T>
extends Object

延迟加载的对象. 并非马上就有. get时候. 没有再加载.

Author:

qiunet 2020-09-23 22:47

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LazyLoader.Listener<T>

Constructor Summary

Constructors

Constructor	Description
LazyLoader(Supplier<T> supplier)

Method Summary

Modifier and Type	Method	Description
void	addCompleteListener(LazyLoader.Listener<T> listener)	添加 loader 有值时候的监听 可以重复添加
T	get()	获取值.
boolean	isNotNull()	是否不为null
boolean	isNull()	是否为null
void	reset(boolean cleanListener)	重置loader

Methods inherited from class java.lang.Object

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

Constructor Details

LazyLoader

public LazyLoader(Supplier<T> supplier)

Method Details

get

public T get()

获取值. 如果为空. 会使用构造函数两面的 Supplier load 一个. 值不为null, 下次直接读取报错的值.

Returns:

addCompleteListener

public void addCompleteListener(LazyLoader.Listener<T> listener)

添加 loader 有值时候的监听 可以重复添加

Parameters:

listener - 监听

reset

public void reset(boolean cleanListener)

重置loader

isNull

public boolean isNull()

是否为null

Returns:

isNotNull

public boolean isNotNull()

是否不为null

Returns: