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SingletonTargetSource (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.aop.target
Class SingletonTargetSource

java.lang.Object
  org.springframework.aop.target.SingletonTargetSource

All Implemented Interfaces:

Serializable, TargetClassAware, TargetSource

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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 Spring 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.

Author:

Rod Johnson, Juergen Hoeller

See Also:

AdvisedSupport.setTarget(Object), Serialized Form

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Constructor Summary
SingletonTargetSource(Object target)           Create a new SingletonTargetSource for the given target.

 

Method Summary
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 target class behind the implementing object (typically a proxy configuration or an actual proxy).
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.
String	toString()

 

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

 

Constructor Detail

SingletonTargetSource

public SingletonTargetSource(Object target)

Create a new SingletonTargetSource for the given target.

Parameters:

target - the target object

Method Detail

getTargetClass

public Class getTargetClass()

Description copied from interface: TargetClassAware

Return the target class behind the implementing object (typically a proxy configuration or an actual proxy).

Specified by:

getTargetClass in interface TargetClassAware

Specified by:

getTargetClass in interface TargetSource

Returns:

the target Class, or null if not known

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getTarget

public Object getTarget()

Description copied from interface: TargetSource

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

Specified by:

getTarget in interface TargetSource

Returns:

the target object, which contains the joinpoint

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releaseTarget

public void releaseTarget(Object target)

Description copied from interface: TargetSource

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

Specified by:

releaseTarget in interface TargetSource

Parameters:

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

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isStatic

public boolean isStatic()

Description copied from interface: 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().

Specified by:

isStatic in interface TargetSource

Returns:

true if the target is immutable

See Also:

TargetSource.getTarget()

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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.

Overrides:

equals in class Object

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hashCode

public int hashCode()

SingletonTargetSource uses the hash code of the target object.

Overrides:

hashCode in class Object

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toString

public String toString()

Overrides:

toString in class Object

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