程序包 infra.aop.target

类 EmptyTargetSource

java.lang.Object

infra.aop.target.EmptyTargetSource

所有已实现的接口:

TargetClassAware, TargetSource, Serializable

public final class EmptyTargetSource
extends Object
implements TargetSource, Serializable

Canonical TargetSource when there is no target (or just the target class known), and behavior is supplied by interfaces and advisors only.

作者:

Rod Johnson, Juergen Hoeller, TODAY 2021/2/1 20:25

另请参阅:

• 序列化表格

字段概要

字段

修饰符和类型	字段	说明
static final EmptyTargetSource	INSTANCE	The canonical (Singleton) instance of this EmptyTargetSource.
private final boolean	isStatic
private static final long	serialVersionUID
private final Class<?>	targetClass

构造器概要

构造器

限定符	构造器	说明
private	EmptyTargetSource(Class<?> targetClass, boolean isStatic)	Create a new instance of the EmptyTargetSource class.

方法概要

修饰符和类型	方法	说明
boolean	equals(Object other)
static EmptyTargetSource	forClass(Class<?> targetClass)	Return an EmptyTargetSource for the given target Class.
static EmptyTargetSource	forClass(Class<?> targetClass, boolean isStatic)	Return an EmptyTargetSource for the given target Class.
Object	getTarget()	Always returns null.
Class<?>	getTargetClass()	Always returns the specified target Class, or null if none.
int	hashCode()
boolean	isStatic()	Always returns true.
private Object	readResolve()	Returns the canonical instance on deserialization in case of no target class, thus protecting the Singleton pattern.
String	toString()

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 infra.aop.TargetSource

releaseTarget

字段详细资料

serialVersionUID

private static final long serialVersionUID

另请参阅:

• 常量字段值

targetClass

private final Class<?> targetClass

isStatic

private final boolean isStatic

INSTANCE

public static final EmptyTargetSource INSTANCE

The canonical (Singleton) instance of this EmptyTargetSource.

构造器详细资料

EmptyTargetSource

private EmptyTargetSource(Class<?> targetClass,
 boolean isStatic)

Create a new instance of the EmptyTargetSource class.

This constructor is private to enforce the Singleton pattern / factory method pattern.

参数:

targetClass - the target class to expose (may be null)

isStatic - whether the TargetSource is marked as static

方法详细资料

getTargetClass

public Class<?> getTargetClass()

Always returns the specified target Class, or null if none.

指定者:

getTargetClass 在接口中 TargetClassAware

指定者:

getTargetClass 在接口中 TargetSource

返回:

the type of targets returned by this TargetSource

isStatic

public boolean isStatic()

Always returns true.

指定者:

isStatic 在接口中 TargetSource

返回:

true if the target is immutable

另请参阅:

• TargetSource.getTarget()

getTarget

public Object getTarget()

Always returns null.

指定者:

getTarget 在接口中 TargetSource

返回:

the target object which contains the join-point, or null if there is no actual target instance

readResolve

private Object readResolve()

Returns the canonical instance on deserialization in case of no target class, thus protecting the Singleton pattern.

equals

public boolean equals(Object other)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object

forClass

public static EmptyTargetSource forClass(Class<?> targetClass)

Return an EmptyTargetSource for the given target Class.

参数:

targetClass - the target Class (may be null)

另请参阅:

• getTargetClass()

forClass

public static EmptyTargetSource forClass(Class<?> targetClass,
 boolean isStatic)

Return an EmptyTargetSource for the given target Class.

参数:

targetClass - the target Class (may be null)

isStatic - whether the TargetSource should be marked as static

另请参阅:

• getTargetClass()