Package org.springframework.aop.support
Class DelegatePerTargetObjectIntroductionInterceptor
- java.lang.Object
- org.springframework.aop.support.IntroductionInfoSupport
- org.springframework.aop.support.DelegatePerTargetObjectIntroductionInterceptor
- All Implemented Interfaces:
Serializable
,Advice
,Interceptor
,MethodInterceptor
,DynamicIntroductionAdvice
,IntroductionInfo
,IntroductionInterceptor
public class DelegatePerTargetObjectIntroductionInterceptor extends IntroductionInfoSupport implements IntroductionInterceptor
Convenient implementation of theIntroductionInterceptor
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.- Since:
- 2.0
- Author:
- Adrian Colyer, Juergen Hoeller
- See Also:
IntroductionInfoSupport.suppressInterface(java.lang.Class<?>)
,DelegatingIntroductionInterceptor
, Serialized Form
Field Summary
Fields inherited from class org.springframework.aop.support.IntroductionInfoSupport
publishedInterfaces
Constructor Summary
Constructors Constructor Description DelegatePerTargetObjectIntroductionInterceptor(Class<?> defaultImplType, Class<?> interfaceType)
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected Object
doProceed(MethodInvocation mi)
Proceed with the suppliedMethodInterceptor
.Object
invoke(MethodInvocation mi)
Subclasses may need to override this if they want to perform custom behaviour in around advice.Methods inherited from class org.springframework.aop.support.IntroductionInfoSupport
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
implementsInterface
Constructor Detail
DelegatePerTargetObjectIntroductionInterceptor
public DelegatePerTargetObjectIntroductionInterceptor(Class<?> defaultImplType, Class<?> interfaceType)
Method Detail
invoke
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 interfaceMethodInterceptor
- Parameters:
mi
- the method invocation joinpoint- Returns:
- the result of the call to
Joinpoint.proceed()
; might be intercepted by the interceptor - Throws:
Throwable
- if the interceptors or the target object throws an exception
doProceed
protected Object doProceed(MethodInvocation mi) throws Throwable
Proceed with the suppliedMethodInterceptor
. 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 forMethodInvocations
on the introduced interfaces.- Throws:
Throwable