接口 ConstructorInterceptor
- 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"); } } }
- 作者:
- Rod Johnson
方法概要
所有方法 实例方法 抽象方法 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 construction 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 construction of a new object. Polite implementations would certainly like to invokeJoinpoint.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