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

Superclass 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

See Also:

AopProxy, Serialized Form

Field Summary

(package private) AdvisorChainFactory	advisorChainFactory
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 to allow use as a JavaBean.

AdvisedSupport(Class[] interfaces)
Create a DefaultProxyConfig 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 newInterface) Add a new proxied interface.
void	addListener(AdvisedSupportListener listener)
boolean	adviceIncluded(Advice advice) Is this advice included in any advisor?
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 other.
protected void	copyConfigurationFrom(AdvisedSupport other, TargetSource ts, List pAdvisors) Take interfaces and ProxyConfig configuration from the other AdvisedSupport, but allow substitution of a fresh TargetSource and interceptor chain
int	countAdvicesOfType(Class interceptorClass) Count advices of the given class
protected AopProxy	createAopProxy() Subclasses should call this to get a new AOP proxy.
AdvisorChainFactory	getAdvisorChainFactory()
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) Return whether this interface is proxied.
protected Object	readResolve() Used to initialize transient state.
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)
boolean	replaceAdvisor(Advisor a, Advisor b) Replace the given advisor.
void	setAdvisorChainFactory(AdvisorChainFactory advisorChainFactory)
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() Serialize 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

Constructor Detail

AdvisedSupport

public AdvisedSupport()

No arg constructor to allow use as a JavaBean.

AdvisedSupport

public AdvisedSupport(Class[] interfaces)

Create a DefaultProxyConfig with the given parameters.

Parameters:

interfaces - the proxied interfaces

Method Detail

addListener

public void addListener(AdvisedSupportListener listener)

removeListener

public void removeListener(AdvisedSupportListener listener)

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)

getAdvisorChainFactory

public AdvisorChainFactory getAdvisorChainFactory()

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 other.

Parameters:

other - AdvisedSupport to copy configuration from

copyConfigurationFrom

protected void copyConfigurationFrom(AdvisedSupport other,
                                     TargetSource ts,
                                     List pAdvisors)

Take interfaces and ProxyConfig configuration from the other AdvisedSupport, but allow substitution of a fresh TargetSource and interceptor chain

Parameters:

other - other AdvisedSupport object to take interfaces and ProxyConfig superclass configuration from

ts - new TargetSource

pAdvisors - new Advisor chain

setInterfaces

public void setInterfaces(Class[] interfaces)

Set the interfaces to be proxied.

addInterface

public void addInterface(Class newInterface)

Add a new proxied interface.

Parameters:

newInterface - additional interface to proxy

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

Returns:

the interfaces proxied by the AOP proxy

removeInterface

public boolean removeInterface(Class intf)

Remove a proxied interface. Does nothing if it isn't proxied.

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.

Specified by:

addAdvice in interface Advised

Parameters:

advice - advice to add to the tail of the chain

Throws:

AopConfigException

See Also:

Advised.addAdvice(int, Advice), DefaultPointcutAdvisor

isInterfaceProxied

public boolean isInterfaceProxied(Class intf)

Description copied from interface: Advised

Return whether this interface is proxied.

Specified by:

isInterfaceProxied in interface Advised

Parameters:

intf - interface to test

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

removeAdvice

public final boolean removeAdvice(Advice advice)
                           throws AopConfigException

Remove the Advisor containing the given advice

Specified by:

removeAdvice in interface Advised

Parameters:

advice - advice to remove

Returns:

whether the Advice was found and removed (false if there was no such advice)

Throws:

AopConfigException

indexOf

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

Parameters:

advice - AOP Alliance advice to search for

Returns:

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

indexOf

public int indexOf(Advisor advisor)

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 - advisor to search for

Returns:

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

removeAdvisor

public final boolean removeAdvisor(Advisor advisor)

Description copied from interface: Advised

Remove the given advisor.

Specified by:

removeAdvisor in interface Advised

Parameters:

advisor - 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

addAdvisor

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

Throws:

AopConfigException

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 - advisor to add at the specified position in the chain

Throws:

AopConfigException

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 - Advisor to add to the end of the chain

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. Cannot return null, but may return the empty array.

replaceAdvisor

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

Replace the given advisor.

NB: 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 - advisor to replace

b - 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

adviceIncluded

public final boolean adviceIncluded(Advice advice)

Is this advice included in any advisor?

Parameters:

advice - advice to check inclusion of

Returns:

whether this advice instance could be run in an invocation

countAdvicesOfType

public final int countAdvicesOfType(Class interceptorClass)

Count advices of the given class

Parameters:

interceptorClass - class of the interceptor to check

Returns:

the count of the interceptors of this class or subclasses

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

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

Throws:

ObjectStreamException

readResolve

protected Object readResolve()
                      throws ObjectStreamException

Used to initialize transient state.

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