The Spring Framework
Class DelegatePerTargetObjectIntroductionInterceptor

  extended by
      extended by
All Implemented Interfaces:
Serializable, Advice, Interceptor, MethodInterceptor, DynamicIntroductionAdvice, IntroductionInfo, IntroductionInterceptor

public class DelegatePerTargetObjectIntroductionInterceptor
extends IntroductionInfoSupport
implements IntroductionInterceptor

Convenient implementation of the IntroductionInterceptor interface.

This differs from DelegatingIntroductionInterceptor in that a single instance of this class can be used to advise multiple target objects, and each target object will have its own delegate (whereas DelegatingIntroductionInterceptor shares the same delegate, and hence the same state across all targets).

The suppressInterface method can be used to suppress interfaces implemented by the delegate class but which should not be introduced to the owning AOP proxy.

An instance of this class is serializable if the delegates are.

Note: There are some implementation similarities between this class and DelegatingIntroductionInterceptor that suggest a possible refactoring to extract a common ancestor class in the future.

Adrian Colyer, Juergen Hoeller
See Also:
IntroductionInfoSupport.suppressInterface(java.lang.Class), DelegatingIntroductionInterceptor, Serialized Form

Field Summary
Fields inherited from class
logger, publishedInterfaces
Constructor Summary
DelegatePerTargetObjectIntroductionInterceptor(Class defaultImplType, Class interfaceType)
Method Summary
protected  Object doProceed(MethodInvocation mi)
          Proceed with the supplied MethodInterceptor.
 Object invoke(MethodInvocation mi)
          Subclasses may need to override this if they want to perform custom behaviour in around advice.
Methods inherited from class
getInterfaces, implementInterfacesOnObject, implementsInterface, isMethodOnIntroducedInterface, suppressInterface
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.springframework.aop.DynamicIntroductionAdvice

Constructor Detail


public DelegatePerTargetObjectIntroductionInterceptor(Class defaultImplType,
                                                      Class interfaceType)
Method Detail


public Object invoke(MethodInvocation mi)
              throws Throwable
Subclasses may need to override this if they want to perform custom behaviour in around advice. However, subclasses should invoke this method, which handles introduced interfaces and forwarding to the target.

Specified by:
invoke in interface MethodInterceptor


protected Object doProceed(MethodInvocation mi)
                    throws Throwable
Proceed with the supplied MethodInterceptor. Subclasses can override this method to intercept method invocations on the target object which is useful when an introduction needs to monitor the object that it is introduced into. This method is never called for MethodInvocations on the introduced interfaces.


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