程序包 infra.aop.target

类 SingletonTargetSource

java.lang.Object

infra.aop.target.SingletonTargetSource

所有已实现的接口:

TargetClassAware, TargetSource, Serializable

public class SingletonTargetSource
extends Object
implements TargetSource, Serializable

Implementation of the TargetSource interface that holds a given object. This is the default implementation of the TargetSource interface, as used by the AOP framework. There is usually no need to create objects of this class in application code.

This class is serializable. However, the actual serializability of a SingletonTargetSource will depend on whether the target is serializable.

作者:

Rod Johnson, Juergen Hoeller, TODAY 2021/2/1 20:18

另请参阅:

• AdvisedSupport.setTarget(Object)
• 序列化表格

字段概要

字段

修饰符和类型	字段	说明
private static final long	serialVersionUID
private final Object	target	Target cached and invoked using reflection.

构造器概要

构造器

构造器	说明
SingletonTargetSource(Object target)	Create a new SingletonTargetSource for the given target.

方法概要

修饰符和类型	方法	说明
boolean	equals(Object other)	Two invoker interceptors are equal if they have the same target or if the targets or the targets are equal.
Object	getTarget()	Return a target instance.
Class<?>	getTargetClass()	Return the type of targets returned by this TargetSource.
int	hashCode()	SingletonTargetSource uses the hash code of the target object.
boolean	isStatic()	Will all calls to TargetSource.getTarget() return the same object?
void	releaseTarget(Object target)	Release the given target object obtained from the TargetSource.getTarget() method, if any.
String	toString()

从类继承的方法 java.lang.Object

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

字段详细资料

serialVersionUID

private static final long serialVersionUID

另请参阅:

• 常量字段值

target

private final Object target

Target cached and invoked using reflection.

构造器详细资料

SingletonTargetSource

public SingletonTargetSource(Object target)

Create a new SingletonTargetSource for the given target.

参数:

target - the target object

方法详细资料

getTargetClass

public Class<?> getTargetClass()

从接口复制的说明: TargetSource

Return the type of targets returned by this TargetSource.

Can return null, although certain usages of a TargetSource might just work with a predetermined target class.

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

getTarget

public Object getTarget()

从接口复制的说明: TargetSource

Return a target instance. Invoked immediately before the AOP framework calls the "target" of an AOP method invocation.

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

releaseTarget

public void releaseTarget(Object target)

从接口复制的说明: TargetSource

Release the given target object obtained from the TargetSource.getTarget() method, if any.

The default implementation is empty.

指定者:

releaseTarget 在接口中 TargetSource

参数:

target - object obtained from a call to TargetSource.getTarget()

isStatic

public boolean isStatic()

从接口复制的说明: TargetSource

Will all calls to TargetSource.getTarget() return the same object?

In that case, there will be no need to invoke TargetSource.releaseTarget(Object), and the AOP framework can cache the return value of TargetSource.getTarget().

The default implementation returns false.

指定者:

isStatic 在接口中 TargetSource

返回:

true if the target is immutable

另请参阅:

• TargetSource.getTarget()

equals

public boolean equals(Object other)

Two invoker interceptors are equal if they have the same target or if the targets or the targets are equal.

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

SingletonTargetSource uses the hash code of the target object.

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object