org.springframework.aop.framework
Class AdvisedSupport

java.lang.Object
  org.springframework.aop.framework.ProxyConfig
      org.springframework.aop.framework.AdvisedSupport

All Implemented Interfaces:

Serializable, Advised, TargetClassAware

Direct Known Subclasses:

ProxyCreatorSupport

public class AdvisedSupport
extends ProxyConfig
implements Advised

Base class for AOP proxy configuration managers. These are not themselves AOP proxies, but subclasses of this class are normally factories from which AOP proxy instances are obtained directly.

This class frees subclasses of the housekeeping of Advices and Advisors, but doesn't actually implement proxy creation methods, which are provided by subclasses.

This class is serializable; subclasses need not be. This class is used to hold snapshots of proxies.

Author:

Rod Johnson, Juergen Hoeller

See Also:

AopProxy, Serialized Form

Field Summary

static TargetSource

EMPTY_TARGET_SOURCE Canonical TargetSource when there's no target, and behavior is supplied by the advisors.

Constructor Summary

AdvisedSupport()
No-arg constructor for use as a JavaBean.

AdvisedSupport(Class[] interfaces)
Create a AdvisedSupport instance with the given parameters.

Method Summary

void	addAdvice(Advice advice) Add the given AOP Alliance advice to the tail of the advice (interceptor) chain.
void	addAdvice(int pos, Advice advice) Cannot add introductions this way unless the advice implements IntroductionInfo.
void	addAdvisor(Advisor advisor) Add an advisor at the end of the advisor chain.
void	addAdvisor(int pos, Advisor advisor) Add an Advisor at the specified position in the chain.
void	addAllAdvisors(Advisor[] advisors) Add all of the given advisors to this proxy configuration.
void	addInterface(Class intf) Add a new proxied interface.
protected void	adviceChanged() Invoked when advice has changed.
boolean	adviceIncluded(Advice advice) Is the given advice included in any advisor within this proxy configuration?
protected void	copyConfigurationFrom(AdvisedSupport other) Call this method on a new instance created by the no-arg constructor to create an independent copy of the configuration from the given object.
protected void	copyConfigurationFrom(AdvisedSupport other, TargetSource targetSource, List advisors) Copy the AOP configuration from the given AdvisedSupport object, but allow substitution of a fresh TargetSource and a given interceptor chain.
int	countAdvicesOfType(Class adviceClass) Count advices of the given class.
AdvisorChainFactory	getAdvisorChainFactory() Return the advisor chain factory to use (never null).
Advisor[]	getAdvisors() Return the advisors applying to this proxy.
protected List	getAdvisorsInternal() Allows uncontrolled access to the List of Advisors.
List	getInterceptorsAndDynamicInterceptionAdvice(Method method, Class targetClass) Determine a list of MethodInterceptor objects for the given method, bsaed on this configuration.
Class[]	getProxiedInterfaces() Return the interfaces proxied by the AOP proxy.
Class	getTargetClass() Return the target class behind the implementing object (typically a proxy configuration or an actual proxy).
TargetSource	getTargetSource() Return the TargetSource used by this Advised object.
int	indexOf(Advice advice) Return the index (from 0) of the given AOP Alliance Advice, or -1 if no such advice is an advice for this proxy.
int	indexOf(Advisor advisor) Return the index (from 0) of the given advisor, or -1 if no such advisor applies to this proxy.
boolean	isInterfaceProxied(Class intf) Determine whether the given interface is proxied.
boolean	removeAdvice(Advice advice) Remove the Advisor containing the given advice.
boolean	removeAdvisor(Advisor advisor) Remove the given advisor.
void	removeAdvisor(int index) Remove the advisor at the given index.
boolean	removeInterface(Class intf) Remove a proxied interface.
boolean	replaceAdvisor(Advisor a, Advisor b) Replace the given advisor.
void	setAdvisorChainFactory(AdvisorChainFactory advisorChainFactory) Set the advisor chain factory to use.
void	setInterfaces(Class[] interfaces) Set the interfaces to be proxied.
void	setTarget(Object target) Set the given object as target.
void	setTargetClass(Class targetClass) Set a target class to be proxied, indicating that the proxy should be castable to the given class.
void	setTargetSource(TargetSource targetSource) Change the TargetSource used by this Advised object.
String	toProxyConfigString() As toString() will normally be delegated to the target, this returns the equivalent for the AOP proxy.
String	toString() For debugging/diagnostic use.
protected void	updateAdvisorArray() Bring the array up to date with the list.
protected Object	writeReplace() Serializes a copy of the state of this class, ignoring subclass state.

Methods inherited from class org.springframework.aop.framework.ProxyConfig

copyFrom, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setExposeProxy, setFrozen, setOpaque, setOptimize, setProxyTargetClass

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.springframework.aop.framework.Advised

isExposeProxy, isFrozen, isProxyTargetClass, setExposeProxy

Field Detail

EMPTY_TARGET_SOURCE

public static final TargetSource EMPTY_TARGET_SOURCE

Canonical TargetSource when there's no target, and behavior is supplied by the advisors.

Constructor Detail

AdvisedSupport

public AdvisedSupport()

No-arg constructor for use as a JavaBean.

AdvisedSupport

public AdvisedSupport(Class[] interfaces)

Create a AdvisedSupport instance with the given parameters.

Parameters:

interfaces - the proxied interfaces

Method Detail

setTarget

public void setTarget(Object target)

Set the given object as target. Will create a SingletonTargetSource for the object.

See Also:

setTargetSource(org.springframework.aop.TargetSource), SingletonTargetSource

setTargetSource

public void setTargetSource(TargetSource targetSource)

Description copied from interface: Advised

Change the TargetSource used by this Advised object. Only works if the configuration isn't frozen.

Specified by:

setTargetSource in interface Advised

Parameters:

targetSource - new TargetSource to use

getTargetSource

public TargetSource getTargetSource()

Description copied from interface: Advised

Return the TargetSource used by this Advised object.

Specified by:

getTargetSource in interface Advised

setTargetClass

public void setTargetClass(Class targetClass)

Set a target class to be proxied, indicating that the proxy should be castable to the given class.

Internally, an EmptyTargetSource for the given target class will be used. The kind of proxy needed will be determined on actual creation of the proxy.

This is a replacement for setting a "targetSource" or "target", for the case where we want a proxy based on a target class (which can be an interface or a concrete class) without having a fully capable TargetSource available.

See Also:

setTargetSource(org.springframework.aop.TargetSource), setTarget(java.lang.Object)

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

Returns:

the target Class, or null if not known

setAdvisorChainFactory

public void setAdvisorChainFactory(AdvisorChainFactory advisorChainFactory)

Set the advisor chain factory to use.

Default is a DefaultAdvisorChainFactory.

getAdvisorChainFactory

public AdvisorChainFactory getAdvisorChainFactory()

Return the advisor chain factory to use (never null).

setInterfaces

public void setInterfaces(Class[] interfaces)

Set the interfaces to be proxied.

addInterface

public void addInterface(Class intf)

Add a new proxied interface.

Parameters:

intf - the additional interface to proxy

removeInterface

public boolean removeInterface(Class intf)

Remove a proxied interface.

Does nothing if the given interface isn't proxied.

Parameters:

intf - the interface to remove from the proxy

Returns:

true if the interface was removed; false if the interface was not found and hence could not be removed

getProxiedInterfaces

public Class[] getProxiedInterfaces()

Description copied from interface: Advised

Return the interfaces proxied by the AOP proxy. Will not include the target class, which may also be proxied.

Specified by:

getProxiedInterfaces in interface Advised

isInterfaceProxied

public boolean isInterfaceProxied(Class intf)

Description copied from interface: Advised

Determine whether the given interface is proxied.

Specified by:

isInterfaceProxied in interface Advised

Parameters:

intf - the interface to check

getAdvisors

public final Advisor[] getAdvisors()

Description copied from interface: Advised

Return the advisors applying to this proxy.

Specified by:

getAdvisors in interface Advised

Returns:

a list of Advisors applying to this proxy (never null)

addAdvisor

public void addAdvisor(Advisor advisor)

Description copied from interface: Advised

Add an advisor at the end of the advisor chain.

The Advisor may be an IntroductionAdvisor, in which new interfaces will be available when a proxy is next obtained from the relevant factory.

Specified by:

addAdvisor in interface Advised

Parameters:

advisor - the advisor to add to the end of the chain

addAdvisor

public void addAdvisor(int pos,
                       Advisor advisor)
                throws AopConfigException

Description copied from interface: Advised

Add an Advisor at the specified position in the chain.

Specified by:

addAdvisor in interface Advised

Parameters:

pos - position in chain (0 is head). Must be valid.

advisor - the advisor to add at the specified position in the chain

Throws:

AopConfigException - in case of invalid advice

removeAdvisor

public boolean removeAdvisor(Advisor advisor)

Description copied from interface: Advised

Remove the given advisor.

Specified by:

removeAdvisor in interface Advised

Parameters:

advisor - the advisor to remove

Returns:

true if the advisor was removed; false if the advisor was not found and hence could not be removed

removeAdvisor

public void removeAdvisor(int index)
                   throws AopConfigException

Description copied from interface: Advised

Remove the advisor at the given index.

Specified by:

removeAdvisor in interface Advised

Parameters:

index - index of advisor to remove

Throws:

AopConfigException - if the index is invalid

indexOf

public int indexOf(Advisor advisor)

Description copied from interface: Advised

Return the index (from 0) of the given advisor, or -1 if no such advisor applies to this proxy.

The return value of this method can be used to index into the advisors array.

Specified by:

indexOf in interface Advised

Parameters:

advisor - the advisor to search for

Returns:

index from 0 of this advisor, or -1 if there's no such advisor

replaceAdvisor

public boolean replaceAdvisor(Advisor a,
                              Advisor b)
                       throws AopConfigException

Description copied from interface: Advised

Replace the given advisor.

Note: If the advisor is an IntroductionAdvisor and the replacement is not or implements different interfaces, the proxy will need to be re-obtained or the old interfaces won't be supported and the new interface won't be implemented.

Specified by:

replaceAdvisor in interface Advised

Parameters:

a - the advisor to replace

b - the advisor to replace it with

Returns:

whether it was replaced. If the advisor wasn't found in the list of advisors, this method returns false and does nothing.

Throws:

AopConfigException - in case of invalid advice

addAllAdvisors

public void addAllAdvisors(Advisor[] advisors)

Add all of the given advisors to this proxy configuration.

Parameters:

advisors - the advisors to register

updateAdvisorArray

protected final void updateAdvisorArray()

Bring the array up to date with the list.

getAdvisorsInternal

protected final List getAdvisorsInternal()

Allows uncontrolled access to the List of Advisors.

Use with care, and remember to refresh the advisor array and fire advice changed events when making any modifications.

addAdvice

public void addAdvice(Advice advice)
               throws AopConfigException

Description copied from interface: Advised

Add the given AOP Alliance advice to the tail of the advice (interceptor) chain.

This will be wrapped in a DefaultPointcutAdvisor with a pointcut that always applies, and returned from the getAdvisors() method in this wrapped form.

Note that the given advice will apply to all invocations on the proxy, even to the toString() method! Use appropriate advice implementations or specify appropriate pointcuts to apply to a narrower set of methods.

Specified by:

addAdvice in interface Advised

Parameters:

advice - advice to add to the tail of the chain

Throws:

AopConfigException - in case of invalid advice

See Also:

Advised.addAdvice(int, Advice), DefaultPointcutAdvisor

addAdvice

public void addAdvice(int pos,
                      Advice advice)
               throws AopConfigException

Cannot add introductions this way unless the advice implements IntroductionInfo.

Specified by:

addAdvice in interface Advised

Parameters:

pos - index from 0 (head)

advice - advice to add at the specified position in the advice chain

Throws:

AopConfigException - in case of invalid advice

removeAdvice

public boolean removeAdvice(Advice advice)
                     throws AopConfigException

Description copied from interface: Advised

Remove the Advisor containing the given advice.

Specified by:

removeAdvice in interface Advised

Parameters:

advice - the advice to remove

Returns:

true of the advice was found and removed; false if there was no such advice

Throws:

AopConfigException

indexOf

public int indexOf(Advice advice)

Description copied from interface: Advised

Return the index (from 0) of the given AOP Alliance Advice, or -1 if no such advice is an advice for this proxy.

The return value of this method can be used to index into the advisors array.

Specified by:

indexOf in interface Advised

Parameters:

advice - AOP Alliance advice to search for

Returns:

index from 0 of this advice, or -1 if there's no such advice

adviceIncluded

public boolean adviceIncluded(Advice advice)

Is the given advice included in any advisor within this proxy configuration?

Parameters:

advice - the advice to check inclusion of

Returns:

whether this advice instance is included

countAdvicesOfType

public int countAdvicesOfType(Class adviceClass)

Count advices of the given class.

Parameters:

adviceClass - the advice class to check

Returns:

the count of the interceptors of this class or subclasses

getInterceptorsAndDynamicInterceptionAdvice

public List getInterceptorsAndDynamicInterceptionAdvice(Method method,
                                                        Class targetClass)

Determine a list of MethodInterceptor objects for the given method, bsaed on this configuration.

Parameters:

method - the proxied method

targetClass - the target class

Returns:

List of MethodInterceptors (may also include InterceptorAndDynamicMethodMatchers)

adviceChanged

protected void adviceChanged()

Invoked when advice has changed.

copyConfigurationFrom

protected void copyConfigurationFrom(AdvisedSupport other)

Call this method on a new instance created by the no-arg constructor to create an independent copy of the configuration from the given object.

Parameters:

other - the AdvisedSupport object to copy configuration from

copyConfigurationFrom

protected void copyConfigurationFrom(AdvisedSupport other,
                                     TargetSource targetSource,
                                     List advisors)

Copy the AOP configuration from the given AdvisedSupport object, but allow substitution of a fresh TargetSource and a given interceptor chain.

Parameters:

other - the AdvisedSupport object to take proxy configuration from

targetSource - the new TargetSource

advisors - the Advisors for the chain

writeReplace

protected Object writeReplace()

Serializes a copy of the state of this class, ignoring subclass state.

toProxyConfigString

public String toProxyConfigString()

Description copied from interface: Advised

As toString() will normally be delegated to the target, this returns the equivalent for the AOP proxy.

Specified by:

toProxyConfigString in interface Advised

Returns:

a string description of the proxy configuration

toString

public String toString()

For debugging/diagnostic use.

Overrides:

toString in class ProxyConfig