Package 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, Sam Brannen
See Also:

  • Field Details

    • 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 Details

    • AdvisedSupport

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

    • AdvisedSupport

      public AdvisedSupport(Class<?>... interfaces)
      Create an AdvisedSupport instance with the given parameters.
      Parameters:
      interfaces - the proxied interfaces

  • Method Details

    • setTarget

      public void setTarget(Object target)
      Set the given object as target.

      Will create a SingletonTargetSource for the object.

      See Also:

    • setTargetSource

      public void setTargetSource(@Nullable 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(@Nullable 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:

    • getTargetClass

      @Nullable 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

    • setPreFiltered

      public void setPreFiltered(boolean preFiltered)
      Description copied from interface: Advised
      Set whether this proxy configuration is pre-filtered so that it only contains applicable advisors (matching this proxy's target class).

      Default is "false". Set this to "true" if the advisors have been pre-filtered already, meaning that the ClassFilter check can be skipped when building the actual advisor chain for proxy invocations.

      Specified by:
      setPreFiltered in interface Advised
      See Also:

    • isPreFiltered

      public boolean isPreFiltered()
      Description copied from interface: Advised
      Return whether this proxy configuration is pre-filtered so that it only contains applicable advisors (matching this proxy's target class).
      Specified by:
      isPreFiltered in interface Advised

    • 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)

    • getAdvisorCount

      public int getAdvisorCount()
      Description copied from interface: Advised
      Return the number of advisors applying to this proxy.

      The default implementation delegates to getAdvisors().length.

      Specified by:
      getAdvisorCount in interface Advised

    • 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 - the 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

    • addAdvisors

      public void addAdvisors(Advisor... advisors)
      Add all the given advisors to this proxy configuration.
      Parameters:
      advisors - the advisors to register

    • addAdvisors

      public void addAdvisors(Collection<Advisor> advisors)
      Add all the given advisors to this proxy configuration.
      Parameters:
      advisors - the advisors to register

    • getAdvisorsInternal

      protected final List<Advisor> getAdvisorsInternal()
      Allows uncontrolled access to the List of Advisors.

      Use with care, and remember to 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 - the advice to add to the tail of the chain
      Throws:
      AopConfigException - in case of invalid advice
      See Also:

    • 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 - the 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 - the 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(@Nullable 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(@Nullable 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<Object> getInterceptorsAndDynamicInterceptionAdvice(Method method, @Nullable Class<?> targetClass)
      Determine a list of MethodInterceptor objects for the given method, based on this configuration.
      Parameters:
      method - the proxied method
      targetClass - the target class
      Returns:
      a 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<Advisor> 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

    • 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