DelegatePerTargetObjectIntroductionInterceptor (Spring Framework 5.2.12.RELEASE API)

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 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.
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 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 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
```
@Nullable
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
    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 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.
    Throws:
    Throwable