所有超级接口:: Advice, Interceptor

public interface ConstructorInterceptor extends Interceptor

Intercepts the construction of a new object.

The user should implement the construct(ConstructorInvocation) method to modify the original behavior. E.g. the following class implements a singleton interceptor (allows only one unique instance for the intercepted class):

 class DebuggingInterceptor implements ConstructorInterceptor {
     Object instance = null;

     Object construct(ConstructorInvocation i) throws Throwable {
         if (instance == null) {
             return instance = i.proceed();
         }
         else {
             throw new Exception("singleton does not allow multiple instance");
         }
     }
 }

方法概要

修饰符和类型

方法

说明

Object

construct(ConstructorInvocation invocation)

Implement this method to perform extra treatments before and after the consrution of a new object.

方法详细资料
- construct
  
  Object construct(ConstructorInvocation invocation) throws Throwable
  
  Implement this method to perform extra treatments before and after the consrution of a new object. Polite implementations would certainly like to invoke Joinpoint.proceed().
  
  参数:
  
  invocation - the construction joinpoint
  
  返回:
  
  the newly created object, which is also the result of the call to Joinpoint.proceed(), might be replaced by the interceptor.
  
  抛出:
  
  Throwable - if the interceptors or the target-object throws an exception.

接口 ConstructorInterceptor

方法概要

方法详细资料

construct