org.springframework.aop.framework
Class AdvisedSupport

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

All Implemented Interfaces:

Serializable, Advised

Direct Known Subclasses:

ProxyFactory, ProxyFactoryBean

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

(package private) AdvisorChainFactory	advisorChainFactory The AdvisorChainFactory to use
static TargetSource	EMPTY_TARGET_SOURCE Canonical TargetSource when there's no target, and behavior is supplied by the advisors.
(package private) TargetSource	targetSource Package-protected to allow direct access for efficiency

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

exposeProxy, logger

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	addAdvisor(int pos, IntroductionAdvisor advisor)
void	addInterface(Class intf) Add a new proxied interface.
void	addListener(AdvisedSupportListener listener) Add the given AdvisedSupportListener to this proxy configuration.
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.
protected AopProxy	createAopProxy() Subclasses should call this to get a new AOP proxy.
AdvisorChainFactory	getAdvisorChainFactory() Return the advisor chain factory to use (never null).
Advisor[]	getAdvisors() Return the advisors applying to this proxy.
Class[]	getProxiedInterfaces() Return the interfaces proxied by the AOP 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.
protected boolean	isActive() Subclasses can call this to check whether any AOP proxies have been created yet.
boolean	isInterfaceProxied(Class intf) Determine whether the given interface is proxied.
protected Object	readResolve() Initializes transient fields.
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.
void	removeListener(AdvisedSupportListener listener) Remove the given AdvisedSupportListener from this proxy configuration.
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	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 Object	writeReplace() Serializes a copy of the state of this class, ignoring subclass state.

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

copyFrom, getAopProxyFactory, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setAopProxyFactory, 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.

targetSource

TargetSource targetSource

Package-protected to allow direct access for efficiency

advisorChainFactory

transient AdvisorChainFactory advisorChainFactory

The AdvisorChainFactory to use

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

setAdvisorChainFactory

public void setAdvisorChainFactory(AdvisorChainFactory advisorChainFactory)

Set the advisor chain factory to use.

Default is a HashMapCachingAdvisorChainFactory.

getAdvisorChainFactory

public AdvisorChainFactory getAdvisorChainFactory()

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

addListener

public void addListener(AdvisedSupportListener listener)

Add the given AdvisedSupportListener to this proxy configuration.

Parameters:

listener - the listener to register

removeListener

public void removeListener(AdvisedSupportListener listener)

Remove the given AdvisedSupportListener from this proxy configuration.

Parameters:

listener - the listener to deregister

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

addAdvisor

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

Throws:

AopConfigException

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

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

createAopProxy

protected AopProxy createAopProxy()

Subclasses should call this to get a new AOP proxy. They should not create an AOP proxy with this as an argument.

isActive

protected final boolean isActive()

Subclasses can call this to check whether any AOP proxies have been created yet.

writeReplace

protected Object writeReplace()
                       throws ObjectStreamException

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

Throws:

ObjectStreamException

readResolve

protected Object readResolve()
                      throws ObjectStreamException

Initializes transient fields.

Throws:

ObjectStreamException

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